RE: “DIETARY INTAKE OF ANTIOXIDANT VITAMINS AND CAROTENOIDS AND RISK OF DEVELOPING ACTIVE TUBERCULOSIS IN A PROSPECTIVE POPULATION-BASED COHORT”

RE: “DIETARY INTAKE OF ANTIOXIDANT VITAMINS AND CAROTENOIDS AND RISK OF DEVELOPING ACTIVE... American Journal of Epidemiology © The Author(s) 2018. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. Letter to the Editor RE: “DIETARY INTAKE OF ANTIOXIDANT VITAMINS AND CAROTENOIDS AND RISK OF DEVELOPING ACTIVE TUBERCULOSIS IN A PROSPECTIVE POPULATION-BASED COHORT” In a prospective cohort study, Soh et al. (1) examined the re- individuals who develop TB disease later in life may be in- lationships of consumption of specific antioxidant vitamins fected with extensively drug-resistant strands of TB (2). We and carotenoids with the risk of developing active tuberculosis encourage the authors to consider examining drug-resistant TB (TB). Future results among that study population could prove within this special cohort population or in future studies. We important in the research and investigation of latent TB disease. applaud Soh et al. for their work on this multifaceted public When attempting to examine relationships between expo- health issue (1) and encourage future research within this sures and outcomes, it is important to utilize methodology that cohort in order to better understand latent TB. actively screens for multiple confounding variables. In the United States, several factors are known to be affiliated with primary TB infection, including human immunodeficiency ACKNOWLEDGMENTS virus (HIV) infection, low socioeconomic status, and smoking (2). Conflict of interest: none declared. Soh et al. mentioned several limitations that should be con- sidered in future study designs, including the omission of die- tary and smoking changes from baseline, which may have REFERENCES significantly biased the results. Additionally, the use of highest level of education as a proxy for socioeconomic status was 1. Soh AZ, Chee CBE, Wang YT, et al. Dietary intake of antioxidant vitamins and carotenoids and risk of developing suboptimal (1). Instead, questions pertaining to housing condi- active tuberculosis in a prospective population-based cohort tions and overcrowding should have been utilized because study. Am J Epidemiol. 2017;186(4):491–500. these conditions increase the likelihood of exposure to and 2. Centers for Disease Control and Prevention. Tuberculosis (TB). spread of TB from an epidemiologic perspective (3). Further- https://www.cdc.gov/tb/publications/factsheets/general/ more, the researchers did not examine HIV status but men- ltbiandactivetb.htm. Accessed September 25, 2017. tioned that Singapore has a relatively low rate of HIV. This aspect 3. Wanyeki I, Olson S, Brassard P, et al. Dwellings, crowding, and may be worth examining within that study population (1, 2). tuberculosis in Montreal. Soc Sci Med. 2006;63(2): 501–511. Their cohort study also presents opportunities for future research. The cohort consisted of older individuals who were Isabel Griffin, Angel Algarin, Stephen White, hypothesized to be residents of Singapore during a time when and Gladys Ibanez (e-mail: igrif005@fiu.edu) TB incidence was as high as 300 per 100,000 persons in the Robert Stempel College of Public Health & Social Work, country. Today in Singapore, the current rate of TB is 40 per Florida International University, Miami, Florida 100,000 persons (1). Soh et al. believed that most of the TB cases in the cohort were likely cases of disease reactivation (2). According the Centers for Disease Control and Prevention, DOI: 10.1093/aje/kwx382 Downloaded from https://academic.oup.com/aje/advance-article-abstract/doi/10.1093/aje/kwx382/4804406 by Ed 'DeepDyve' Gillespie user on 08 June 2018 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Epidemiology Oxford University Press

RE: “DIETARY INTAKE OF ANTIOXIDANT VITAMINS AND CAROTENOIDS AND RISK OF DEVELOPING ACTIVE TUBERCULOSIS IN A PROSPECTIVE POPULATION-BASED COHORT”

Free
1 page

Loading next page...
1 Page
 
/lp/ou_press/re-dietary-intake-of-antioxidant-vitamins-and-carotenoids-and-risk-of-6lNf0vYDb4
Publisher
Oxford University Press
Copyright
© The Author(s) 2018. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
ISSN
0002-9262
eISSN
1476-6256
D.O.I.
10.1093/aje/kwx382
Publisher site
See Article on Publisher Site

Abstract

American Journal of Epidemiology © The Author(s) 2018. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. Letter to the Editor RE: “DIETARY INTAKE OF ANTIOXIDANT VITAMINS AND CAROTENOIDS AND RISK OF DEVELOPING ACTIVE TUBERCULOSIS IN A PROSPECTIVE POPULATION-BASED COHORT” In a prospective cohort study, Soh et al. (1) examined the re- individuals who develop TB disease later in life may be in- lationships of consumption of specific antioxidant vitamins fected with extensively drug-resistant strands of TB (2). We and carotenoids with the risk of developing active tuberculosis encourage the authors to consider examining drug-resistant TB (TB). Future results among that study population could prove within this special cohort population or in future studies. We important in the research and investigation of latent TB disease. applaud Soh et al. for their work on this multifaceted public When attempting to examine relationships between expo- health issue (1) and encourage future research within this sures and outcomes, it is important to utilize methodology that cohort in order to better understand latent TB. actively screens for multiple confounding variables. In the United States, several factors are known to be affiliated with primary TB infection, including human immunodeficiency ACKNOWLEDGMENTS virus (HIV) infection, low socioeconomic status, and smoking (2). Conflict of interest: none declared. Soh et al. mentioned several limitations that should be con- sidered in future study designs, including the omission of die- tary and smoking changes from baseline, which may have REFERENCES significantly biased the results. Additionally, the use of highest level of education as a proxy for socioeconomic status was 1. Soh AZ, Chee CBE, Wang YT, et al. Dietary intake of antioxidant vitamins and carotenoids and risk of developing suboptimal (1). Instead, questions pertaining to housing condi- active tuberculosis in a prospective population-based cohort tions and overcrowding should have been utilized because study. Am J Epidemiol. 2017;186(4):491–500. these conditions increase the likelihood of exposure to and 2. Centers for Disease Control and Prevention. Tuberculosis (TB). spread of TB from an epidemiologic perspective (3). Further- https://www.cdc.gov/tb/publications/factsheets/general/ more, the researchers did not examine HIV status but men- ltbiandactivetb.htm. Accessed September 25, 2017. tioned that Singapore has a relatively low rate of HIV. This aspect 3. Wanyeki I, Olson S, Brassard P, et al. Dwellings, crowding, and may be worth examining within that study population (1, 2). tuberculosis in Montreal. Soc Sci Med. 2006;63(2): 501–511. Their cohort study also presents opportunities for future research. The cohort consisted of older individuals who were Isabel Griffin, Angel Algarin, Stephen White, hypothesized to be residents of Singapore during a time when and Gladys Ibanez (e-mail: igrif005@fiu.edu) TB incidence was as high as 300 per 100,000 persons in the Robert Stempel College of Public Health & Social Work, country. Today in Singapore, the current rate of TB is 40 per Florida International University, Miami, Florida 100,000 persons (1). Soh et al. believed that most of the TB cases in the cohort were likely cases of disease reactivation (2). According the Centers for Disease Control and Prevention, DOI: 10.1093/aje/kwx382 Downloaded from https://academic.oup.com/aje/advance-article-abstract/doi/10.1093/aje/kwx382/4804406 by Ed 'DeepDyve' Gillespie user on 08 June 2018

Journal

American Journal of EpidemiologyOxford University Press

Published: Jan 12, 2018

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off