83_FR_17862 83 FR 17783 - World Trade Center Health Program; Petition 018-Hypertension; Finding of Insufficient Evidence

83 FR 17783 - World Trade Center Health Program; Petition 018-Hypertension; Finding of Insufficient Evidence

DEPARTMENT OF HEALTH AND HUMAN SERVICES

Federal Register Volume 83, Issue 79 (April 24, 2018)

Page Range17783-17787
FR Document2018-08456

On January 5, 2018, the Administrator of the World Trade Center (WTC) Health Program received a petition (Petition 018) to add hypertension (high blood pressure) to the List of WTC-Related Health Conditions (List). Upon reviewing the scientific and medical literature, including information provided by the petitioner, the Administrator has determined that the available evidence does not have the potential to provide a basis for a decision on whether to add hypertension to the List. The Administrator also finds that insufficient evidence exists to request a recommendation of the WTC Health Program Scientific/Technical Advisory Committee (STAC), to publish a proposed rule, or to publish a determination not to publish a proposed rule.

Federal Register, Volume 83 Issue 79 (Tuesday, April 24, 2018)
[Federal Register Volume 83, Number 79 (Tuesday, April 24, 2018)]
[Proposed Rules]
[Pages 17783-17787]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-08456]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

42 CFR Part 88

[NIOSH Docket 094]


World Trade Center Health Program; Petition 018--Hypertension; 
Finding of Insufficient Evidence

AGENCY: Centers for Disease Control and Prevention, HHS.

ACTION: Denial of petition for addition of a health condition.

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SUMMARY: On January 5, 2018, the Administrator of the World Trade 
Center (WTC) Health Program received a petition (Petition 018) to add 
hypertension (high blood pressure) to the List of WTC-Related Health 
Conditions (List). Upon reviewing the scientific and medical 
literature, including information provided by the petitioner, the 
Administrator has determined that the available evidence does not have 
the potential to provide a basis for a decision on whether to add 
hypertension to the List. The Administrator also finds that 
insufficient evidence exists to request a recommendation of the WTC 
Health Program Scientific/Technical Advisory Committee (STAC), to 
publish a proposed rule, or to publish a determination not to publish a 
proposed rule.

DATES: The Administrator of the WTC Health Program is denying this 
petition for the addition of a health condition as of April 24, 2018.

FOR FURTHER INFORMATION CONTACT: Rachel Weiss, Program Analyst, 1090 
Tusculum Avenue, MS: C-48, Cincinnati, OH 45226; telephone (855) 818-
1629 (this is a toll-free number); email [email protected].

SUPPLEMENTARY INFORMATION:

Table of Contents

A. WTC Health Program Statutory Authority
B. Procedures for Evaluating a Petition
C. Petition 018
D. Review of Scientific and Medical Information and Administrator 
Determination
E. Administrator's Final Decision on Whether To Propose the Addition 
of Hypertension to the List
F. Approval To Submit Document to the Office of the Federal Register

A. WTC Health Program Statutory Authority

    Title I of the James Zadroga 9/11 Health and Compensation Act of 
2010 (Pub. L. 111-347, as amended by Pub. L. 114-113), added Title 
XXXIII to the

[[Page 17784]]

Public Health Service (PHS) Act,\1\ establishing the WTC Health Program 
within the Department of Health and Human Services (HHS). The WTC 
Health Program provides medical monitoring and treatment benefits to 
eligible firefighters and related personnel, law enforcement officers, 
and rescue, recovery, and cleanup workers who responded to the 
September 11, 2001, terrorist attacks in New York City, at the 
Pentagon, and in Shanksville, Pennsylvania (responders), and to 
eligible persons who were present in the dust or dust cloud on 
September 11, 2001, or who worked, resided, or attended school, 
childcare, or adult daycare in the New York City disaster area 
(survivors).
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    \1\ Title XXXIII of the PHS Act is codified at 42 U.S.C. 300mm 
to 300mm-61. Those portions of the James Zadroga 9/11 Health and 
Compensation Act of 2010 found in Titles II and III of Public Law 
111-347 do not pertain to the WTC Health Program and are codified 
elsewhere.
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    All references to the Administrator of the WTC Health Program 
(Administrator) in this notice mean the Director of the National 
Institute for Occupational Safety and Health (NIOSH) or his designee.
    Pursuant to section 3312(a)(6)(B) of the PHS Act, interested 
parties may petition the Administrator to add a health condition to the 
List in 42 CFR 88.15. Within 90 days after receipt of a valid petition 
to add a condition to the List, the Administrator must take one of the 
following four actions described in section 3312(a)(6)(B) of the PHS 
Act and Sec.  88.16(a)(2) of the Program regulations: (1) Request a 
recommendation of the STAC; (2) publish a proposed rule in the Federal 
Register to add such health condition; (3) publish in the Federal 
Register the Administrator's determination not to publish such a 
proposed rule and the basis for such determination; or (4) publish in 
the Federal Register a determination that insufficient evidence exists 
to take action under (1) through (3) above.

B. Procedures for Evaluating a Petition

    In addition to the regulatory provisions, the WTC Health Program 
has developed policies to guide the review of submissions and 
petitions,\2\ as well as the analysis of evidence supporting the 
potential addition of a non-cancer health condition to the List.\3\
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    \2\ See WTC Health Program [2014], Policy and Procedures for 
Handling Submissions and Petitions to Add a Health Condition to the 
List of WTC-Related Health Conditions, May 14, 2014, http://www.cdc.gov/wtc/pdfs/WTCHPPPPetitionHandlingProcedures14May2014.pdf.
    \3\ See WTC Health Program [2017], Policy and Procedures for 
Adding Non-Cancer Conditions to the List of WTC-Related Health 
Conditions, February 14, 2017, https://www.cdc.gov/wtc/pdfs/WTCHP_PP_Adding_NonCancers_14_February_2017.pdf.
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    A valid petition must include sufficient medical basis for the 
association between the September 11, 2001, terrorist attacks and the 
health condition to be added; in accordance with WTC Health Program 
policy, reference to a peer-reviewed, published, epidemiologic study 
about the health condition among 9/11-exposed populations or to 
clinical case reports of health conditions in WTC responders or 
survivors may demonstrate the required medical basis.\4\ Studies 
linking 9/11 agents to the petitioned health condition may also provide 
sufficient medical basis for a valid petition.
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    \4\ See supra note 2.
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    After the Program has determined that a petition is valid, the 
Administrator must direct the Program to conduct a review of the 
scientific literature to determine if the available scientific 
information has the potential to provide a basis for a decision on 
whether to add the health condition to the List.\5\ The literature 
review includes a search for peer-reviewed, published, epidemiologic 
studies (including direct observational studies in the case of health 
conditions such as injuries) about the health condition among 9/11-
exposed populations. The Program evaluates the scientific quality 
limitations of each peer-reviewed, published, epidemiologic study of 
the health condition identified in the literature search; the Program 
then compiles the scientific results of each study to assess whether a 
causal relationship between 9/11 exposures and the health condition is 
supported, and evaluates whether the results of the studies are 
representative of the 9/11-exposed population of responders and 
survivors. A health condition may be added to the List if peer-
reviewed, published, epidemiologic studies provide support that the 
health condition is substantially likely \6\ to be causally associated 
with 9/11 exposures. If the evaluation of evidence provided in peer-
reviewed, published, epidemiologic studies of the health condition in 
9/11 populations demonstrates a high, but not substantial, likelihood 
of a causal association between the 9/11 exposures and the health 
condition, then the Administrator may consider additional highly 
relevant scientific evidence regarding exposures to 9/11 agents \7\ 
from sources using non-9/11-exposed populations. If that additional 
assessment establishes that the health condition is substantially 
likely to be causally associated with 9/11 exposures among 9/11-exposed 
populations, the health condition may be added to the List.
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    \5\ See supra note 3.
    \6\ The ``substantially likely'' standard is met when the 
scientific evidence, taken as a whole, demonstrates a strong 
relationship between the 9/11 exposures and the health condition.
    \7\ 9/11 agents are chemical, physical, biological, or other 
agents or hazards reported in a published, peer-reviewed exposure 
assessment study of responders or survivors who were present in the 
New York City disaster area, at the Pentagon site, or at the 
Shanksville, Pennsylvania site, as those locations are defined in 42 
CFR 88.1.
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C. Petition 018

    On January 5, 2018, the Administrator received a petition (Petition 
018) from a WTC responder who worked at Ground Zero, requesting the 
addition of ``hypertension--high blood pressure'' to the List.\8\ The 
petition included one scientific article reviewing the findings of 
peer-reviewed, published epidemiologic studies concerning the 
association of hypertension and cardiovascular disease with post-
traumatic stress disorder (PTSD), by McFarlane [2010].\9\ The McFarlane 
article on its own did not provide a medical basis, but it did provide 
a reference to a peer-reviewed, published study by Gerin et al. [2005] 
\10\ of hypertension in populations that were potentially affected by 
the September 11, 2001, terrorist attacks, in New York City, Washington 
DC, Chicago, and Mississippi, suggesting an association between 9/11 
exposures and the health condition. The inclusion of a reference to 
this study in the submission provides sufficient medical basis for the 
submission to be considered a valid petition.
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    \8\ See Petition 018, WTC Health Program: Petitions Received, 
http://www.cdc.gov/wtc/received.html.
    \9\ McFarlane AC [2010], The Long-Term Costs of Traumatic 
Stress: Intertwined Physical and Psychological Consequences, World 
Psychiatry 9:3-10.
    \10\ Gerin W, Chaplin W, Schwartz JE, et al. [2005], Sustained 
Blood Pressure Increase After an Acute Stressor: the Effects of the 
11 September 2001 Attack on the New York City World Trade Center, 
Journal of Hypertension 23(2):279-284.
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D. Review of Scientific and Medical Information and Administrator 
Determination

    In response to Petition 018, and pursuant to the Program policy on 
the addition of non-cancer health conditions to the List,\11\ the 
Program conducted reviews of the scientific literature on 
hypertension.\12\ Through the literature search, the Program

[[Page 17785]]

identified 21 references to review for relevance; \13\ of those 
identified references, three were found to be relevant peer-reviewed, 
published, epidemiologic studies of hypertension in 9/11-exposed 
populations: Simeon et al. [2008],\14\ Trasande et al. [2013],\15\ and 
Kim et al. [2018].\16\ At this stage of the evaluation process, the 
Gerin et al. [2005] study was more carefully reviewed. The study 
population in Gerin et al. [2005] included participants residing in New 
York City and Washington DC who might have been exposed to reports of 
the September 11, 2001, terrorist attacks, in ``newspapers, radio and 
television broadcasts, magazine articles, and web-based discussions, 
literally every day from the time they occurred. . . .'' \17\ None of 
the participants were reported to have been first responders, 
volunteers, or survivors of the terrorist attacks, or to have been 
directly exposed to 9/11 agents. Accordingly, the Administrator 
determined that Gerin et al. [2005] is not an epidemiologic study of 
hypertension in the 9/11-exposed populations and does not meet the 
threshold for relevance established in the Program policy; therefore, 
the study is not further reviewed below.
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    \11\ Supra note 3.
    \12\ Databases searched include: NIOSHTIC-2, ProQuest Health & 
Safety, PubMed, Scopus, Toxicology Abstracts/TOXLINE, and Medline.
    \13\ The 21 studies included a study by Jordan et al. [2011], 
which the Program evaluated and determined not to be relevant to an 
evaluation of hypertension among the 9/11 population. The study's 
authors evaluated cardiovascular disease hospitalizations among WTC 
Health Registry members; however, hypertension was grouped with 
other cardiovascular conditions and, therefore, the effect of 9/11 
exposures on hypertension hospitalizations could not be ascertained. 
Jordan HT, Brackbill RM, Cone JE, et al. [2011], Mortality among 
survivors of the Sept 11, 2001, World Trade Center disaster: results 
from the World Trade Center Health Registry cohort, Lancet 
378(9794):879-887.
    \14\ Simeon D, Yehuda R, Knutelska M, et al. [2008], 
Dissociation versus posttraumatic stress: cortisol and physiological 
correlates in adults highly exposed to the World Trade Center attack 
on 9/11, Psychiatry Research 161(3):325-329.
    \15\ Trasande L, Fiorino EK, Attina T, et al. [2013], 
Associations of World Trade Center exposures with pulmonary and 
cardiometabolic outcomes among children seeking care for health 
concerns, The Science of the Total Environment 444:320-326.
    \16\ Kim H, Kriebel D, Liu B, et al. [2018], Standardized 
morbidity ratios of four chronic health conditions among World Trade 
Center responders: Comparison to the National Health Interview 
Survey, American Journal of Industrial Medicine (accepted for 
publication).
    \17\ Supra note 10, at 283.
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    Simeon et al. [2008]. The cross-sectional study \18\ by Simeon et 
al. [2008] was designed to ``investigate perturbations in the major 
stress response systems . . . after the 9/11 attack, with a specific 
focus of dissecting unique correlates of posttraumatic stress versus 
dissociative symptomatology.'' The authors' primary hypothesis was that 
dissociation and posttraumatic stress show different associations to 
cortisol and psychophysiological measures (dexamethasone suppression, 
psychosocial stress reactivity, and physiological stress reactivity). 
Blood pressure and heart rate were also measured to allow comparisons 
between physiologic measures of dissociation and posttraumatic stress 
in exposed and unexposed study participants. Participants included 21 
New York City residents considered ``highly exposed to 9/11,'' as well 
as 10 New York City residents who did not have significant 9/11 
exposure or a diagnosis of posttraumatic stress disorder (PTSD), who 
served as the control group. Exposed participants reported being inside 
a tower, being in very close proximity to Ground Zero, losing a close 
loved-one, or participating in rescue and recovery efforts. Mean 
resting systolic blood pressure, mean resting diastolic blood pressure, 
mean peak Trier Social Stress Test (TSST) systolic blood pressure, and 
mean peak TSST diastolic blood pressure \19\ did not differ 
significantly between the exposed and unexposed groups, even among 
seven of the 21 exposed participants who met criteria for a diagnosis 
of PTSD.
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    \18\ An observational study that analyzes data from a population 
or sub-set of a population at a specific point in time.
    \19\ Blood pressure was measured at rest (averaged over four 
hourly time points) and at its peak during TSST. The study did not 
provide any information about equipment used or guidelines followed 
to measure blood pressure.
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    The Program found several limitations with the Simeon et al. [2008] 
study. First, the study inadequately adjusted for confounding; because 
the authors did not provide enough information about the control group, 
the Program was unable to determine whether adjustments had been made 
for all potential confounders. Second, the study inadequately addressed 
recruitment bias; the exposed study participants were recruited by 
newspaper advertisement, which primarily captures those individuals who 
subscribe to or purchase the newspaper and thus may not be 
representative of the entire 9/11-exposed population. Third, the study 
incompletely considered all aspects of exposure; the authors described 
the experimental and control groups only as ``highly exposed'' and no 
``significant exposure,'' respectively, rather than seeking to 
quantitatively or qualitatively characterize the different types of 
exposure experienced by participants, as well as the intensity and 
duration of their exposures, and the resulting impacts on health 
outcomes. Finally, the study insufficiently addressed the inadequacies 
of the referent population; the study employs a small sample size and 
thus lacks adequate power to evaluate the association between 9/11 
exposure and hypertension.
    Trasande et al. [2013]. The second study, by Trasande et al. 
[2013], is also a cross-sectional study. It was designed to examine the 
impact of clinically-reported exposures on the health of children who 
were exposed to the terrorist attack in New York City. Study 
participants included 148 patients who were 18 years of age or younger 
on September 11, 2001, enrolled in the WTC Environmental Health Center 
(the health program for 9/11 survivors that predated the WTC Health 
Program). The authors compared blood pressure data from the study 
population \20\ with that of children 6 to 19 years of age, reported in 
CDC's National Health and Nutrition Examination Survey (NHANES) 2001-
2006. The authors developed exposure categories for dust cloud exposure 
and presence/absence at their home residence one day during September 
11-18, 2001, but none were used in the evaluation of an association 
with prehypertension or hypertension. The study found that 45.5 percent 
of children in the study population were prehypertensive and 10.6 
percent were hypertensive, compared with the NHANES data, in which 6.9 
percent were prehypertensive and 2.4 percent were hypertensive; \21\ 
prehypertension among the study group was positively associated with 
older age (+9.5% odds/year older, p = 0.024).
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    \20\ Blood pressure was measured using a Philips SureSigns VS3 
oscillometric sphygmomanometer with appropriate cuff size for arm 
length, following American Heart Association guidelines in Urbina E, 
Alpert B, Flynn J, Hayman L, Harshfield GA, Jacobson M, et al. 
[2008], Ambulatory blood pressure monitoring in children and 
adolescents: recommendations for standard assessment: a scientific 
statement from the American Heart Association Atherosclerosis, 
Hypertension, and Obesity in Youth Committee of the council on 
cardiovascular disease in the young and the council for high blood 
pressure research, Hypertension 52:433-51. The guidelines referenced 
by the study authors are for ambulatory blood pressure monitoring, 
not single clinic measurements as were conducted during the study.
    \21\ The study authors categorized blood pressure (BP) outcomes 
as follows: present/absent prehypertension (BP >=90th percentile for 
age/height Z-score/gender or systolic BP >=120 mm Hg or diastolic BP 
>=80 mm Hg) and present/absent hypertension (BP >=95th percentile 
for age/height Z-score/gender or systolic BP >=140 mm Hg or 
diastolic BP >=90 mm Hg).
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    Although the results of Trasande et al. [2013] suggest possible 
cardiovascular effects, the Program found several major limitations 
with the study. First, the study inadequately adjusted for possible 
confounders; although the authors

[[Page 17786]]

identify that an important confounder is living in an urban setting 
where the types and concentrations of particulates are different than 
in other settings, no adjustments were made to account for the setting, 
limiting the value of the comparing the urban study population's blood 
pressure data with NHANES data, which includes data from suburban and 
rural populations likely exposed to different types and concentrations 
of particulates. Second, the study inadequately addressed recruitment 
bias; the authors selected participants from among those who presented 
to the WTC Environmental Health Center, and were <=18 years old on 
September 11, 2001 and thus may have been sicker than the general 
population of survivors. Third, the study incompletely considered all 
aspects of exposure; 9/11 exposure among participants with hypertension 
was not considered or evaluated. Finally, the study insufficiently 
addressed the inadequacies of the referent population; the study does 
not describe whether the NHANES sample has a comparable ethnic 
composition and residential setting to that of the study group. 
Although the study did find a relatively high frequency of 
cardiometabolic risks, including elevated blood pressure, the authors 
did not evaluate the association between 9/11 exposure and 
hypertension.
    Kim et al. [2018]. The third study, a prospective cohort study \22\ 
by Kim et al. [2018], was designed to compare the lifetime prevalence 
of hypertension, asthma, diabetes, and cancer among WTC responders 
currently enrolled in the WTC Health Program, with a referent group 
from the National Health Interview Survey (NHIS). Hypertension \23\ 
among WTC responders was self-reported, as was exposure to WTC dust and 
other stressors. After comparing annual standardized morbidity ratios 
for hypertension prevalence, the authors found that hypertension 
prevalence was statistically significantly increased among male WTC 
responders between 2007 and 2009, peaking at 1.17 (95% CI 1.13-1.22) in 
2008, but decreased among male WTC responders in 2010, which was the 
last year studied. Hypertension prevalence was never elevated among 
women. The authors ultimately concluded that the slightly higher 
prevalence of hypertension in men in the study group may be associated 
with WTC-related PTSD and that further analysis and follow-up of WTC 
responders is warranted.
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    \22\ A study that follows a cohort of similar individuals over 
time to determine how risk factors affect health outcomes.
    \23\ Responders who participated in the Kim et al. [2018], study 
were asked: ``Has a doctor ever told you that you had high blood 
pressure?'' The Program assumes the authors define hypertension as 
having responded ``yes'' to this questions, although this level of 
detail was not provided by the authors. Participants of the NHIS 
study were asked: ``Have you ever been told by a doctor or health 
professional that you have hypertension, also called high blood 
pressure?'' Kim et al. [2018] provides no further information 
provided regarding the study's definition of ``high blood pressure'' 
or ``hypertension.''
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    The Program identified several limitations with the Kim et al. 
[2018] study. First, the study inadequately adjusted for confounders; 
the standardized morbidity ratios were age-adjusted, but not adjusted 
for other confounders. Second, the study did not adequately adjust for 
recruitment bias; the authors acknowledge that selection bias is likely 
because sicker WTC responders may have been more likely to enroll in 
the WTC Health Program and attend follow-up examinations more 
frequently. Third, the study incompletely considered all aspects of 
exposure; the authors described the WTC responder and referent groups 
only as ``exposed'' and ``unexposed,'' respectively. Fourth, the study 
incompletely addressed the inadequacies of the referent population; the 
NHIS data, while representative of the U.S. population, is likely not 
comparable to the WTC responder cohort. Finally, outcome data in the 
study was incomplete; the authors used self-reported hypertension 
rather than conducting blood pressure measurements in study 
participants, and used different questions to define hypertension in 
the WTC responder group compared with the referent group.
    Together, all three studies were assessed to determine whether a 
causal relationship between 9/11 exposures and hypertension is 
supported. The Program uses the following Bradford Hill criteria to 
evaluate studies of 9/11-exposed populations: strength of association, 
precision of the risk estimate, consistency of findings, biological 
gradient, and plausibility and coherence. Only one of the three studies 
demonstrated a statistically significant increase in hypertension among 
WTC responders (Kim et al. [2018]); one study found no statistically 
significant differences in blood pressure between exposed and unexposed 
participants (Simeon et al. [2008]); and one study used an inadequate 
comparison group and this faulty study design feature precluded an 
evaluation of the association between 9/11 exposures and the risk of 
hypertension (Trasande et al. [2013]). Only one of the three studies 
demonstrated a precise risk estimate (Kim et al. [2018]); risk 
estimates were not calculated in the other two studies. The studies did 
not share a single definition of hypertension, and, ultimately, their 
findings were not consistent, as only Kim et al. [2018] showed a 
statistically significant increase in hypertension among WTC 
responders. The biological gradient and dose response were not 
evaluated in any of the studies. Although none of the studies evaluated 
a causal association between hypertension and WTC dust, the Program 
finds it plausible and coherent that 9/11 exposures may increase blood 
pressure, possibly through one or more of the following mechanisms: (1) 
Systemic oxidative stress/inflammation, (2) elevated endothelin levels 
or activity, or (3) altered autonomic nervous system balance,\24\ and 
this is consistent with the results presented by Trasande et al. [2013] 
and Kim et al. [2018].
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    \24\ See Brook RD, Urch B, Dvonch JT, et al. [2009], Insights 
into the mechanisms and mediators of the effects of air pollution 
exposure on blood pressure and vascular function in healthy humans, 
Hypertension 54(3):659-667.
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    Finally, the three studies were reviewed to determine whether the 
studies represent both the WTC responder and survivor populations or a 
subgroup of those populations, or whether the results can be 
extrapolated to the entire 9/11-exposed population. The Program found 
that only one study demonstrated that the results could be extrapolated 
to the population of WTC responders (Kim et al. [2018]); another study 
was conducted among a potentially non-representative and small sample 
of WTC survivors (Simeon et al. [2008]), and the final study did not 
describe a sampling procedure to allow an assessment of 
representativeness (Trasande et al. [2013]).
    The studies described and evaluated above had limitations and 
lacked consistency among their results. Neither the one study that 
showed a statistically significant increase in hypertension among WTC 
responders, Kim et al. [2018], nor all three studies, taken together, 
were able to demonstrate that hypertension is substantially likely to 
be causally associated with 9/11 exposures among 9/11-exposed 
populations.

E. Administrator's Final Decision on Whether To Propose the Addition of 
Hypertension to the List

    The Administrator has determined that insufficient evidence is 
available to take further action at this time, including proposing the 
addition of hypertension to the List (pursuant to PHS Act, sec. 
3312(a)(6)(B)(ii) and 42 CFR 88.16(a)(2)(ii)) or publishing a 
determination not to publish a proposed

[[Page 17787]]

rule in the Federal Register (pursuant to PHS Act, sec. 
3312(a)(6)(B)(iii) and 42 CFR 88.16(a)(2)(iii)). The Administrator has 
also determined that requesting a recommendation from the STAC 
(pursuant to PHS Act, sec. 3312(a)(6)(B)(i) and 42 CFR 88.16(a)(2)(i)) 
is unwarranted.
    For the reasons discussed above, the Petition 018 request to add 
hypertension to the List of WTC-Related Health Conditions is denied.
    The WTC Health Program may consider hypertension to be a condition 
medically associated with a certified WTC-related health condition in 
individual cases. Program members who think their hypertension is a 
progression or side effect of treatment of a certified WTC-related 
health condition should ask their WTC Health Program medical provider 
whether their hypertension might be considered a medically associated 
health condition.

F. Approval To Submit Document to the Office of the Federal Register

    The Secretary, HHS, or his designee, the Director, Centers for 
Disease Control and Prevention (CDC) and Administrator, Agency for 
Toxic Substances and Disease Registry (ATSDR), authorized the 
undersigned, the Administrator of the WTC Health Program, to sign and 
submit the document to the Office of the Federal Register for 
publication as an official document of the WTC Health Program. Robert 
Redfield M.D., Director, CDC, and Administrator, ATSDR, approved this 
document for publication on April 18, 2018.

John J. Howard,
Administrator, World Trade Center Health Program and Director, National 
Institute for Occupational Safety and Health, Centers for Disease 
Control and Prevention, Department of Health and Human Services.
[FR Doc. 2018-08456 Filed 4-23-18; 8:45 am]
BILLING CODE 4163-18-P



                                                                             Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Proposed Rules                                             17783

                                                    small business definition based on an                   93% ($196,000) of the $211,000 fee                     DEPARTMENT OF HEALTH AND
                                                    employee-based threshold. Specifically,                 revenue deficit recovered. EPA requests                HUMAN SERVICES
                                                    EPA estimated the impact when the                       comments on this approach of ensuring
                                                    small business definition is set using the              that EPA continues to collect 25% of                   42 CFR Part 88
                                                    following: (a) A fixed employee-based                   applicable Agency costs.
                                                    threshold that defines small businesses                                                                        [NIOSH Docket 094]
                                                                                                              Comments on this supplemental
                                                    as those firms with 500 or fewer
                                                                                                            analysis document should be submitted                  World Trade Center Health Program;
                                                    employees, and (b) the thresholds set by
                                                    the Small Business Administration,                      to the docket for the proposed rule. In                Petition 018—Hypertension; Finding of
                                                    which vary by industry sector. A copy                   addition, in order to give interested                  Insufficient Evidence
                                                    of the analysis, titled ‘‘Supplemental                  parties the opportunity to consider this
                                                    Analysis of Alternative Small Business                  additional analysis and prepare                        AGENCY:  Centers for Disease Control and
                                                    Size Standard Definitions and their                     meaningful comments, EPA is hereby                     Prevention, HHS.
                                                    Effect on TSCA User Fee Collection’’, is                extending the comment period, which is                 ACTION: Denial of petition for addition of
                                                    now available in the docket for this                    set to end on April 27, 2018, until May                a health condition.
                                                    action (EPA–HQ–OPPT–2016–0401).                         24, 2018.
                                                                                                                                                                   SUMMARY:    On January 5, 2018, the
                                                       EPA requests comment on this                         List of Subjects                                       Administrator of the World Trade
                                                    analysis and whether an employee-                                                                              Center (WTC) Health Program received
                                                    based size standard would be more                       40 CFR Part 700
                                                                                                                                                                   a petition (Petition 018) to add
                                                    appropriate than a receipts-based size                                                                         hypertension (high blood pressure) to
                                                                                                              Chemicals, Environmental protection,
                                                    standard and what that employee level                                                                          the List of WTC-Related Health
                                                    should be; whether the size standard, be                Hazardous substances, Reporting and
                                                                                                            recordkeeping requirements, User fees.                 Conditions (List). Upon reviewing the
                                                    it receipts-based or employee-based,                                                                           scientific and medical literature,
                                                    should vary from industry to industry to                40 CFR Part 720                                        including information provided by the
                                                    reflect differences among the impacted                                                                         petitioner, the Administrator has
                                                    industries; and what other factors and                    Chemicals, Environmental protection,                 determined that the available evidence
                                                    data sources the Agency should                          Hazardous substances, Imports,                         does not have the potential to provide
                                                    consider, besides inflation, when                       Reporting and recordkeeping                            a basis for a decision on whether to add
                                                    developing the size standard to qualify                 requirements.                                          hypertension to the List. The
                                                    for reduced fee amounts. The                                                                                   Administrator also finds that
                                                    supplemental analysis estimates the                     40 CFR Part 723
                                                                                                                                                                   insufficient evidence exists to request a
                                                    impact on fee amounts should an                           Chemicals, Environmental protection,                 recommendation of the WTC Health
                                                    employee-based size standard be used to                 Hazardous substances, Phosphate,                       Program Scientific/Technical Advisory
                                                    determine eligibility for reduced fees. In              Reporting and recordkeeping                            Committee (STAC), to publish a
                                                    order to ensure that EPA meets the                      requirements.                                          proposed rule, or to publish a
                                                    statutory requirement that fees are                                                                            determination not to publish a proposed
                                                    sufficient to defray 25% of the estimated               40 CFR Part 725                                        rule.
                                                    Agency costs, EPA would need to
                                                                                                              Administrative practice and                          DATES: The Administrator of the WTC
                                                    recoup the revenue loss resulting from
                                                    moving to one of the two employee-                      procedure, Chemicals, Environmental                    Health Program is denying this petition
                                                    based small business definitions                        protection, Hazardous substances,                      for the addition of a health condition as
                                                    presented in the analysis by increasing                 Imports, Labeling, Occupational safety                 of April 24, 2018.
                                                    the TSCA section 5 proposed general                     and health, Reporting and                              FOR FURTHER INFORMATION CONTACT:
                                                    industry fees. The revenue losses would                 recordkeeping requirements.                            Rachel Weiss, Program Analyst, 1090
                                                    likely arise from TSCA section 5                                                                               Tusculum Avenue, MS: C–48,
                                                                                                            40 CFR Part 790                                        Cincinnati, OH 45226; telephone (855)
                                                    submissions, given that EPA estimates
                                                    more businesses would qualify for the                                                                          818–1629 (this is a toll-free number);
                                                                                                              Administrative practice and
                                                    lower fee levels under the employee-                                                                           email NIOSHregs@cdc.gov.
                                                                                                            procedure, Chemicals, Confidential
                                                    based definitions. Impacts to TSCA                      business information, Environmental                    SUPPLEMENTARY INFORMATION:
                                                    section 4 and 6 fee collections are                     protection, Hazardous substances,                      Table of Contents
                                                    unlikely as EPA expects that consortia                  Reporting and recordkeeping
                                                    will ensure that the full fee amount is                                                                        A. WTC Health Program Statutory Authority
                                                                                                            requirements.                                          B. Procedures for Evaluating a Petition
                                                    remitted regardless of the proportion of
                                                    small businesses participating in the                   40 CFR Part 791                                        C. Petition 018
                                                                                                                                                                   D. Review of Scientific and Medical
                                                    consortia. In the supplemental analysis
                                                                                                              Administrative practice and                              Information and Administrator
                                                    EPA estimated the impact on fees if the                                                                            Determination
                                                    revenue loss is recouped by allocating it               procedure, Chemicals, Environmental
                                                                                                                                                                   E. Administrator’s Final Decision on Whether
                                                    proportionally among the proposed                       protection, Hazardous substances,                          To Propose the Addition of Hypertension
                                                    TSCA section 5 general fees. In this                    Reporting and recordkeeping                                to the List
                                                    case, in order to recoup the entire                     requirements.                                          F. Approval To Submit Document to the
jstallworth on DSKBBY8HB2PROD with PROPOSALS




                                                    amount, the general fee for PMN/                          Dated: April 10, 2018.                                   Office of the Federal Register
                                                    MCAN/SNUN would increase by $413,                                                                              A. WTC Health Program Statutory
                                                                                                            Charlotte Bertrand,
                                                    from $16,000 to a new fee of $16,413,                                                                          Authority
                                                    and the general fee for Exemptions                      Acting Principal Deputy Assistant
                                                                                                            Administrator, Office of Chemical Safety and             Title I of the James Zadroga 9/11
                                                    would increase by $122, from $4,700 to
                                                                                                            Pollution Prevention.                                  Health and Compensation Act of 2010
                                                    a new fee of $4,822. If rounding to the
                                                                                                            [FR Doc. 2018–08427 Filed 4–23–18; 8:45 am]            (Pub. L. 111–347, as amended by Pub.
                                                    nearest $100, this results in new fees of
                                                    $16,400 and $4,800, respectively, with                  BILLING CODE 6560–50–P                                 L. 114–113), added Title XXXIII to the


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                                                    17784                    Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Proposed Rules

                                                    Public Health Service (PHS) Act,1                          A valid petition must include                        regarding exposures to 9/11 agents 7
                                                    establishing the WTC Health Program                     sufficient medical basis for the                        from sources using non-9/11-exposed
                                                    within the Department of Health and                     association between the September 11,                   populations. If that additional
                                                    Human Services (HHS). The WTC                           2001, terrorist attacks and the health                  assessment establishes that the health
                                                    Health Program provides medical                         condition to be added; in accordance                    condition is substantially likely to be
                                                    monitoring and treatment benefits to                    with WTC Health Program policy,                         causally associated with 9/11 exposures
                                                    eligible firefighters and related                       reference to a peer-reviewed, published,                among 9/11-exposed populations, the
                                                    personnel, law enforcement officers,                    epidemiologic study about the health                    health condition may be added to the
                                                    and rescue, recovery, and cleanup                       condition among 9/11-exposed                            List.
                                                    workers who responded to the                            populations or to clinical case reports of              C. Petition 018
                                                    September 11, 2001, terrorist attacks in                health conditions in WTC responders or
                                                    New York City, at the Pentagon, and in                  survivors may demonstrate the required                     On January 5, 2018, the Administrator
                                                    Shanksville, Pennsylvania (responders),                 medical basis.4 Studies linking 9/11                    received a petition (Petition 018) from a
                                                    and to eligible persons who were                        agents to the petitioned health condition               WTC responder who worked at Ground
                                                    present in the dust or dust cloud on                    may also provide sufficient medical                     Zero, requesting the addition of
                                                    September 11, 2001, or who worked,                      basis for a valid petition.                             ‘‘hypertension—high blood pressure’’ to
                                                    resided, or attended school, childcare,                                                                         the List.8 The petition included one
                                                                                                               After the Program has determined that                scientific article reviewing the findings
                                                    or adult daycare in the New York City                   a petition is valid, the Administrator
                                                    disaster area (survivors).                                                                                      of peer-reviewed, published
                                                                                                            must direct the Program to conduct a                    epidemiologic studies concerning the
                                                       All references to the Administrator of               review of the scientific literature to
                                                    the WTC Health Program                                                                                          association of hypertension and
                                                                                                            determine if the available scientific                   cardiovascular disease with post-
                                                    (Administrator) in this notice mean the                 information has the potential to provide
                                                    Director of the National Institute for                                                                          traumatic stress disorder (PTSD), by
                                                                                                            a basis for a decision on whether to add                McFarlane [2010].9 The McFarlane
                                                    Occupational Safety and Health                          the health condition to the List.5 The
                                                    (NIOSH) or his designee.                                                                                        article on its own did not provide a
                                                                                                            literature review includes a search for                 medical basis, but it did provide a
                                                       Pursuant to section 3312(a)(6)(B) of                 peer-reviewed, published,
                                                    the PHS Act, interested parties may                                                                             reference to a peer-reviewed, published
                                                                                                            epidemiologic studies (including direct                 study by Gerin et al. [2005] 10 of
                                                    petition the Administrator to add a                     observational studies in the case of
                                                    health condition to the List in 42 CFR                                                                          hypertension in populations that were
                                                                                                            health conditions such as injuries) about               potentially affected by the September
                                                    88.15. Within 90 days after receipt of a                the health condition among 9/11-                        11, 2001, terrorist attacks, in New York
                                                    valid petition to add a condition to the                exposed populations. The Program                        City, Washington DC, Chicago, and
                                                    List, the Administrator must take one of                evaluates the scientific quality                        Mississippi, suggesting an association
                                                    the following four actions described in                 limitations of each peer-reviewed,                      between 9/11 exposures and the health
                                                    section 3312(a)(6)(B) of the PHS Act and                published, epidemiologic study of the                   condition. The inclusion of a reference
                                                    § 88.16(a)(2) of the Program regulations:               health condition identified in the                      to this study in the submission provides
                                                    (1) Request a recommendation of the                     literature search; the Program then                     sufficient medical basis for the
                                                    STAC; (2) publish a proposed rule in the                compiles the scientific results of each                 submission to be considered a valid
                                                    Federal Register to add such health                     study to assess whether a causal                        petition.
                                                    condition; (3) publish in the Federal                   relationship between 9/11 exposures
                                                    Register the Administrator’s                                                                                    D. Review of Scientific and Medical
                                                                                                            and the health condition is supported,
                                                    determination not to publish such a                                                                             Information and Administrator
                                                                                                            and evaluates whether the results of the
                                                    proposed rule and the basis for such                                                                            Determination
                                                                                                            studies are representative of the 9/11-
                                                    determination; or (4) publish in the                    exposed population of responders and                       In response to Petition 018, and
                                                    Federal Register a determination that                   survivors. A health condition may be                    pursuant to the Program policy on the
                                                    insufficient evidence exists to take                    added to the List if peer-reviewed,                     addition of non-cancer health
                                                    action under (1) through (3) above.                     published, epidemiologic studies                        conditions to the List,11 the Program
                                                    B. Procedures for Evaluating a Petition                 provide support that the health                         conducted reviews of the scientific
                                                                                                            condition is substantially likely 6 to be               literature on hypertension.12 Through
                                                      In addition to the regulatory                                                                                 the literature search, the Program
                                                                                                            causally associated with 9/11 exposures.
                                                    provisions, the WTC Health Program
                                                                                                            If the evaluation of evidence provided
                                                    has developed policies to guide the                                                                               7 9/11 agents are chemical, physical, biological, or
                                                                                                            in peer-reviewed, published,
                                                    review of submissions and petitions,2 as                                                                        other agents or hazards reported in a published,
                                                                                                            epidemiologic studies of the health                     peer-reviewed exposure assessment study of
                                                    well as the analysis of evidence
                                                                                                            condition in 9/11 populations                           responders or survivors who were present in the
                                                    supporting the potential addition of a
                                                                                                            demonstrates a high, but not substantial,               New York City disaster area, at the Pentagon site,
                                                    non-cancer health condition to the List.3                                                                       or at the Shanksville, Pennsylvania site, as those
                                                                                                            likelihood of a causal association                      locations are defined in 42 CFR 88.1.
                                                      1 Title XXXIII of the PHS Act is codified at 42       between the 9/11 exposures and the                        8 See Petition 018, WTC Health Program: Petitions

                                                    U.S.C. 300mm to 300mm–61. Those portions of the         health condition, then the                              Received, http://www.cdc.gov/wtc/received.html.
                                                    James Zadroga 9/11 Health and Compensation Act          Administrator may consider additional                     9 McFarlane AC [2010], The Long-Term Costs of

                                                    of 2010 found in Titles II and III of Public Law 111–   highly relevant scientific evidence                     Traumatic Stress: Intertwined Physical and
                                                    347 do not pertain to the WTC Health Program and                                                                Psychological Consequences, World Psychiatry 9:3–
jstallworth on DSKBBY8HB2PROD with PROPOSALS




                                                    are codified elsewhere.                                                                                         10.
                                                      2 See WTC Health Program [2014], Policy and           February 14, 2017, https://www.cdc.gov/wtc/pdfs/          10 Gerin W, Chaplin W, Schwartz JE, et al. [2005],

                                                    Procedures for Handling Submissions and Petitions       WTCHP_PP_Adding_NonCancers_14_February_                 Sustained Blood Pressure Increase After an Acute
                                                    to Add a Health Condition to the List of WTC-           2017.pdf.                                               Stressor: the Effects of the 11 September 2001
                                                                                                              4 See supra note 2.
                                                    Related Health Conditions, May 14, 2014, http://                                                                Attack on the New York City World Trade Center,
                                                    www.cdc.gov/wtc/pdfs/WTCHPPPPetitionHandling              5 See supra note 3.                                   Journal of Hypertension 23(2):279–284.
                                                    Procedures14May2014.pdf.                                  6 The ‘‘substantially likely’’ standard is met when     11 Supra note 3.
                                                      3 See WTC Health Program [2017], Policy and           the scientific evidence, taken as a whole,                12 Databases searched include: NIOSHTIC–2,

                                                    Procedures for Adding Non-Cancer Conditions to          demonstrates a strong relationship between the 9/       ProQuest Health & Safety, PubMed, Scopus,
                                                    the List of WTC-Related Health Conditions,              11 exposures and the health condition.                  Toxicology Abstracts/TOXLINE, and Medline.



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                                                                              Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Proposed Rules                                                   17785

                                                    identified 21 references to review for                   symptomatology.’’ The authors’ primary                 the study insufficiently addressed the
                                                    relevance; 13 of those identified                        hypothesis was that dissociation and                   inadequacies of the referent population;
                                                    references, three were found to be                       posttraumatic stress show different                    the study employs a small sample size
                                                    relevant peer-reviewed, published,                       associations to cortisol and                           and thus lacks adequate power to
                                                    epidemiologic studies of hypertension                    psychophysiological measures                           evaluate the association between 9/11
                                                    in 9/11-exposed populations: Simeon et                   (dexamethasone suppression,                            exposure and hypertension.
                                                    al. [2008],14 Trasande et al. [2013],15                  psychosocial stress reactivity, and                       Trasande et al. [2013]. The second
                                                    and Kim et al. [2018].16 At this stage of                physiological stress reactivity). Blood                study, by Trasande et al. [2013], is also
                                                    the evaluation process, the Gerin et al.                 pressure and heart rate were also                      a cross-sectional study. It was designed
                                                    [2005] study was more carefully                          measured to allow comparisons between                  to examine the impact of clinically-
                                                    reviewed. The study population in                        physiologic measures of dissociation                   reported exposures on the health of
                                                    Gerin et al. [2005] included participants                and posttraumatic stress in exposed and                children who were exposed to the
                                                    residing in New York City and                            unexposed study participants.                          terrorist attack in New York City. Study
                                                    Washington DC who might have been                        Participants included 21 New York City                 participants included 148 patients who
                                                    exposed to reports of the September 11,                  residents considered ‘‘highly exposed to               were 18 years of age or younger on
                                                    2001, terrorist attacks, in ‘‘newspapers,                9/11,’’ as well as 10 New York City                    September 11, 2001, enrolled in the
                                                    radio and television broadcasts,                         residents who did not have significant                 WTC Environmental Health Center (the
                                                    magazine articles, and web-based                         9/11 exposure or a diagnosis of                        health program for 9/11 survivors that
                                                    discussions, literally every day from the                posttraumatic stress disorder (PTSD),                  predated the WTC Health Program). The
                                                    time they occurred. . . .’’ 17 None of the               who served as the control group.                       authors compared blood pressure data
                                                    participants were reported to have been                  Exposed participants reported being                    from the study population 20 with that of
                                                    first responders, volunteers, or survivors               inside a tower, being in very close                    children 6 to 19 years of age, reported
                                                    of the terrorist attacks, or to have been                proximity to Ground Zero, losing a close               in CDC’s National Health and Nutrition
                                                    directly exposed to 9/11 agents.                         loved-one, or participating in rescue and              Examination Survey (NHANES) 2001–
                                                    Accordingly, the Administrator                           recovery efforts. Mean resting systolic                2006. The authors developed exposure
                                                    determined that Gerin et al. [2005] is not               blood pressure, mean resting diastolic                 categories for dust cloud exposure and
                                                    an epidemiologic study of hypertension                   blood pressure, mean peak Trier Social                 presence/absence at their home
                                                    in the 9/11-exposed populations and                      Stress Test (TSST) systolic blood                      residence one day during September
                                                    does not meet the threshold for                          pressure, and mean peak TSST diastolic                 11–18, 2001, but none were used in the
                                                    relevance established in the Program                     blood pressure 19 did not differ                       evaluation of an association with
                                                    policy; therefore, the study is not further              significantly between the exposed and                  prehypertension or hypertension. The
                                                    reviewed below.                                          unexposed groups, even among seven of                  study found that 45.5 percent of
                                                       Simeon et al. [2008]. The cross-                      the 21 exposed participants who met                    children in the study population were
                                                    sectional study 18 by Simeon et al.                      criteria for a diagnosis of PTSD.                      prehypertensive and 10.6 percent were
                                                    [2008] was designed to ‘‘investigate                        The Program found several limitations               hypertensive, compared with the
                                                    perturbations in the major stress                        with the Simeon et al. [2008] study.                   NHANES data, in which 6.9 percent
                                                    response systems . . . after the 9/11                    First, the study inadequately adjusted                 were prehypertensive and 2.4 percent
                                                    attack, with a specific focus of                         for confounding; because the authors                   were hypertensive; 21 prehypertension
                                                    dissecting unique correlates of                          did not provide enough information                     among the study group was positively
                                                    posttraumatic stress versus dissociative
                                                                                                             about the control group, the Program                   associated with older age (+9.5% odds/
                                                       13 The 21 studies included a study by Jordan et
                                                                                                             was unable to determine whether                        year older, p = 0.024).
                                                    al. [2011], which the Program evaluated and              adjustments had been made for all                         Although the results of Trasande et al.
                                                    determined not to be relevant to an evaluation of        potential confounders. Second, the                     [2013] suggest possible cardiovascular
                                                    hypertension among the 9/11 population. The              study inadequately addressed                           effects, the Program found several major
                                                    study’s authors evaluated cardiovascular disease
                                                    hospitalizations among WTC Health Registry
                                                                                                             recruitment bias; the exposed study                    limitations with the study. First, the
                                                    members; however, hypertension was grouped with          participants were recruited by                         study inadequately adjusted for possible
                                                    other cardiovascular conditions and, therefore, the      newspaper advertisement, which                         confounders; although the authors
                                                    effect of 9/11 exposures on hypertension                 primarily captures those individuals
                                                    hospitalizations could not be ascertained. Jordan
                                                    HT, Brackbill RM, Cone JE, et al. [2011], Mortality
                                                                                                             who subscribe to or purchase the                         20 Blood pressure was measured using a Philips

                                                                                                             newspaper and thus may not be                          SureSigns VS3 oscillometric sphygmomanometer
                                                    among survivors of the Sept 11, 2001, World Trade                                                               with appropriate cuff size for arm length, following
                                                    Center disaster: results from the World Trade Center     representative of the entire 9/11-                     American Heart Association guidelines in Urbina E,
                                                    Health Registry cohort, Lancet 378(9794):879–887.        exposed population. Third, the study                   Alpert B, Flynn J, Hayman L, Harshfield GA,
                                                       14 Simeon D, Yehuda R, Knutelska M, et al.

                                                    [2008], Dissociation versus posttraumatic stress:
                                                                                                             incompletely considered all aspects of                 Jacobson M, et al. [2008], Ambulatory blood
                                                                                                             exposure; the authors described the                    pressure monitoring in children and adolescents:
                                                    cortisol and physiological correlates in adults                                                                 recommendations for standard assessment: a
                                                    highly exposed to the World Trade Center attack on       experimental and control groups only as                scientific statement from the American Heart
                                                    9/11, Psychiatry Research 161(3):325–329.                ‘‘highly exposed’’ and no ‘‘significant                Association Atherosclerosis, Hypertension, and
                                                       15 Trasande L, Fiorino EK, Attina T, et al. [2013],
                                                                                                             exposure,’’ respectively, rather than                  Obesity in Youth Committee of the council on
                                                    Associations of World Trade Center exposures with                                                               cardiovascular disease in the young and the council
                                                    pulmonary and cardiometabolic outcomes among             seeking to quantitatively or qualitatively
                                                                                                                                                                    for high blood pressure research, Hypertension
                                                    children seeking care for health concerns, The           characterize the different types of                    52:433–51. The guidelines referenced by the study
                                                    Science of the Total Environment 444:320–326.            exposure experienced by participants,                  authors are for ambulatory blood pressure
jstallworth on DSKBBY8HB2PROD with PROPOSALS




                                                       16 Kim H, Kriebel D, Liu B, et al. [2018],
                                                                                                             as well as the intensity and duration of               monitoring, not single clinic measurements as were
                                                    Standardized morbidity ratios of four chronic                                                                   conducted during the study.
                                                    health conditions among World Trade Center
                                                                                                             their exposures, and the resulting                       21 The study authors categorized blood pressure
                                                    responders: Comparison to the National Health            impacts on health outcomes. Finally,                   (BP) outcomes as follows: present/absent
                                                    Interview Survey, American Journal of Industrial                                                                prehypertension (BP ≥90th percentile for age/height
                                                    Medicine (accepted for publication).                       19 Blood pressure was measured at rest (averaged     Z-score/gender or systolic BP ≥120 mm Hg or
                                                       17 Supra note 10, at 283.
                                                                                                             over four hourly time points) and at its peak during   diastolic BP ≥80 mm Hg) and present/absent
                                                       18 An observational study that analyzes data from     TSST. The study did not provide any information        hypertension (BP ≥95th percentile for age/height Z-
                                                    a population or sub-set of a population at a specific    about equipment used or guidelines followed to         score/gender or systolic BP ≥140 mm Hg or diastolic
                                                    point in time.                                           measure blood pressure.                                BP ≥90 mm Hg).



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                                                    17786                    Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Proposed Rules

                                                    identify that an important confounder is                1.13–1.22) in 2008, but decreased                      not calculated in the other two studies.
                                                    living in an urban setting where the                    among male WTC responders in 2010,                     The studies did not share a single
                                                    types and concentrations of particulates                which was the last year studied.                       definition of hypertension, and,
                                                    are different than in other settings, no                Hypertension prevalence was never                      ultimately, their findings were not
                                                    adjustments were made to account for                    elevated among women. The authors                      consistent, as only Kim et al. [2018]
                                                    the setting, limiting the value of the                  ultimately concluded that the slightly                 showed a statistically significant
                                                    comparing the urban study population’s                  higher prevalence of hypertension in                   increase in hypertension among WTC
                                                    blood pressure data with NHANES data,                   men in the study group may be                          responders. The biological gradient and
                                                    which includes data from suburban and                   associated with WTC-related PTSD and                   dose response were not evaluated in any
                                                    rural populations likely exposed to                     that further analysis and follow-up of                 of the studies. Although none of the
                                                    different types and concentrations of                   WTC responders is warranted.                           studies evaluated a causal association
                                                    particulates. Second, the study                           The Program identified several                       between hypertension and WTC dust,
                                                    inadequately addressed recruitment                      limitations with the Kim et al. [2018]                 the Program finds it plausible and
                                                    bias; the authors selected participants                 study. First, the study inadequately                   coherent that 9/11 exposures may
                                                    from among those who presented to the                   adjusted for confounders; the                          increase blood pressure, possibly
                                                    WTC Environmental Health Center, and                    standardized morbidity ratios were age-                through one or more of the following
                                                    were ≤18 years old on September 11,                     adjusted, but not adjusted for other                   mechanisms: (1) Systemic oxidative
                                                    2001 and thus may have been sicker                      confounders. Second, the study did not                 stress/inflammation, (2) elevated
                                                    than the general population of                          adequately adjust for recruitment bias;                endothelin levels or activity, or (3)
                                                    survivors. Third, the study incompletely                the authors acknowledge that selection                 altered autonomic nervous system
                                                    considered all aspects of exposure; 9/11                bias is likely because sicker WTC                      balance,24 and this is consistent with
                                                    exposure among participants with                        responders may have been more likely                   the results presented by Trasande et al.
                                                    hypertension was not considered or                      to enroll in the WTC Health Program                    [2013] and Kim et al. [2018].
                                                    evaluated. Finally, the study                           and attend follow-up examinations                         Finally, the three studies were
                                                    insufficiently addressed the                            more frequently. Third, the study                      reviewed to determine whether the
                                                    inadequacies of the referent population;                incompletely considered all aspects of                 studies represent both the WTC
                                                    the study does not describe whether the                 exposure; the authors described the                    responder and survivor populations or a
                                                    NHANES sample has a comparable                          WTC responder and referent groups                      subgroup of those populations, or
                                                    ethnic composition and residential                      only as ‘‘exposed’’ and ‘‘unexposed,’’                 whether the results can be extrapolated
                                                    setting to that of the study group.                     respectively. Fourth, the study                        to the entire 9/11-exposed population.
                                                    Although the study did find a relatively                incompletely addressed the                             The Program found that only one study
                                                    high frequency of cardiometabolic risks,                inadequacies of the referent population;               demonstrated that the results could be
                                                    including elevated blood pressure, the                  the NHIS data, while representative of                 extrapolated to the population of WTC
                                                    authors did not evaluate the association                the U.S. population, is likely not                     responders (Kim et al. [2018]); another
                                                    between 9/11 exposure and                               comparable to the WTC responder                        study was conducted among a
                                                    hypertension.                                           cohort. Finally, outcome data in the                   potentially non-representative and small
                                                       Kim et al. [2018]. The third study, a                study was incomplete; the authors used                 sample of WTC survivors (Simeon et al.
                                                    prospective cohort study 22 by Kim et al.               self-reported hypertension rather than                 [2008]), and the final study did not
                                                    [2018], was designed to compare the                     conducting blood pressure                              describe a sampling procedure to allow
                                                    lifetime prevalence of hypertension,                    measurements in study participants,                    an assessment of representativeness
                                                    asthma, diabetes, and cancer among                      and used different questions to define                 (Trasande et al. [2013]).
                                                    WTC responders currently enrolled in                    hypertension in the WTC responder                         The studies described and evaluated
                                                    the WTC Health Program, with a                          group compared with the referent group.                above had limitations and lacked
                                                    referent group from the National Health                   Together, all three studies were                     consistency among their results. Neither
                                                    Interview Survey (NHIS).                                assessed to determine whether a causal                 the one study that showed a statistically
                                                    Hypertension 23 among WTC responders                    relationship between 9/11 exposures                    significant increase in hypertension
                                                    was self-reported, as was exposure to                   and hypertension is supported. The                     among WTC responders, Kim et al.
                                                    WTC dust and other stressors. After                     Program uses the following Bradford                    [2018], nor all three studies, taken
                                                    comparing annual standardized                           Hill criteria to evaluate studies of 9/11-             together, were able to demonstrate that
                                                    morbidity ratios for hypertension                       exposed populations: strength of                       hypertension is substantially likely to be
                                                    prevalence, the authors found that                      association, precision of the risk                     causally associated with 9/11 exposures
                                                    hypertension prevalence was                             estimate, consistency of findings,                     among 9/11-exposed populations.
                                                    statistically significantly increased                   biological gradient, and plausibility and
                                                                                                                                                                   E. Administrator’s Final Decision on
                                                    among male WTC responders between                       coherence. Only one of the three studies
                                                                                                                                                                   Whether To Propose the Addition of
                                                    2007 and 2009, peaking at 1.17 (95% CI                  demonstrated a statistically significant
                                                                                                                                                                   Hypertension to the List
                                                                                                            increase in hypertension among WTC
                                                       22 A study that follows a cohort of similar          responders (Kim et al. [2018]); one                      The Administrator has determined
                                                    individuals over time to determine how risk factors     study found no statistically significant               that insufficient evidence is available to
                                                    affect health outcomes.                                                                                        take further action at this time,
                                                       23 Responders who participated in the Kim et al.
                                                                                                            differences in blood pressure between
                                                                                                            exposed and unexposed participants                     including proposing the addition of
                                                    [2018], study were asked: ‘‘Has a doctor ever told
                                                                                                            (Simeon et al. [2008]); and one study                  hypertension to the List (pursuant to
jstallworth on DSKBBY8HB2PROD with PROPOSALS




                                                    you that you had high blood pressure?’’ The
                                                    Program assumes the authors define hypertension         used an inadequate comparison group                    PHS Act, sec. 3312(a)(6)(B)(ii) and 42
                                                    as having responded ‘‘yes’’ to this questions,                                                                 CFR 88.16(a)(2)(ii)) or publishing a
                                                    although this level of detail was not provided by the
                                                                                                            and this faulty study design feature
                                                    authors. Participants of the NHIS study were asked:     precluded an evaluation of the                         determination not to publish a proposed
                                                    ‘‘Have you ever been told by a doctor or health         association between 9/11 exposures and
                                                    professional that you have hypertension, also called                                                              24 See Brook RD, Urch B, Dvonch JT, et al. [2009],
                                                                                                            the risk of hypertension (Trasande et al.
                                                    high blood pressure?’’ Kim et al. [2018] provides no                                                           Insights into the mechanisms and mediators of the
                                                    further information provided regarding the study’s
                                                                                                            [2013]). Only one of the three studies                 effects of air pollution exposure on blood pressure
                                                    definition of ‘‘high blood pressure’’ or                demonstrated a precise risk estimate                   and vascular function in healthy humans,
                                                    ‘‘hypertension.’’                                       (Kim et al. [2018]); risk estimates were               Hypertension 54(3):659–667.



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                                                                             Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Proposed Rules                                                 17787

                                                    rule in the Federal Register (pursuant to               think their hypertension is a progression              Program, to sign and submit the
                                                    PHS Act, sec. 3312(a)(6)(B)(iii) and 42                 or side effect of treatment of a certified             document to the Office of the Federal
                                                    CFR 88.16(a)(2)(iii)). The Administrator                WTC-related health condition should                    Register for publication as an official
                                                    has also determined that requesting a                   ask their WTC Health Program medical                   document of the WTC Health Program.
                                                    recommendation from the STAC                            provider whether their hypertension                    Robert Redfield M.D., Director, CDC,
                                                    (pursuant to PHS Act, sec.                              might be considered a medically                        and Administrator, ATSDR, approved
                                                    3312(a)(6)(B)(i) and 42 CFR                             associated health condition.                           this document for publication on April
                                                    88.16(a)(2)(i)) is unwarranted.                                                                                18, 2018.
                                                      For the reasons discussed above, the                  F. Approval To Submit Document to the
                                                    Petition 018 request to add hypertension                Office of the Federal Register                         John J. Howard,
                                                    to the List of WTC-Related Health                         The Secretary, HHS, or his designee,                 Administrator, World Trade Center Health
                                                    Conditions is denied.                                   the Director, Centers for Disease Control              Program and Director, National Institute for
                                                      The WTC Health Program may                            and Prevention (CDC) and                               Occupational Safety and Health, Centers for
                                                    consider hypertension to be a condition                 Administrator, Agency for Toxic                        Disease Control and Prevention, Department
                                                    medically associated with a certified                   Substances and Disease Registry                        of Health and Human Services.
                                                    WTC-related health condition in                         (ATSDR), authorized the undersigned,                   [FR Doc. 2018–08456 Filed 4–23–18; 8:45 am]
                                                    individual cases. Program members who                   the Administrator of the WTC Health                    BILLING CODE 4163–18–P
jstallworth on DSKBBY8HB2PROD with PROPOSALS




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Document Created: 2018-04-24 00:38:38
Document Modified: 2018-04-24 00:38:38
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionProposed Rules
ActionDenial of petition for addition of a health condition.
DatesThe Administrator of the WTC Health Program is denying this petition for the addition of a health condition as of April 24, 2018.
ContactRachel Weiss, Program Analyst, 1090 Tusculum Avenue, MS: C-48, Cincinnati, OH 45226; telephone (855) 818- 1629 (this is a toll-free number); email [email protected]
FR Citation83 FR 17783 

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