Exposure to Traffic Pollution and Increased Risk of Rheumatoid Arthritis

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Exposure to Traffic Pollution and Increased Risk of Rheumatoid Arthritis

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Title: Exposure to Traffic Pollution and Increased Risk of Rheumatoid Arthritis
Author: Puett, Robin C.; Hart, Jaime Elizabeth; Laden, Francine; Costenbader, Karen Harte; Karlson, Elizabeth Wood

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Citation: Hart, Jaime E., Francine Laden, Robin C. Puett, Karen H. Costenbader, and Elizabeth W. Karlson. 2009. Exposure to Traffic Pollution and Increased Risk of Rheumatoid Arthritis. Environmental Health Perspectives 117(7): 1065-1069.
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Abstract: Background: Rheumatoid arthritis (RA) is a chronic systemic inflammatory disease that affects approximately 1% of the adult population, and to date, genetic factors explain < 50% of the risk. Particulate air pollution, especially of traffic origin, has been linked to systemic inflammation in many studies. Objectives: We examined the association of distance to road, a marker of traffic pollution exposure, and incidence of RA in a prospective cohort study.Methods We studied 90,297 U.S. women in the Nurses’ Health Study. We used a geographic information system to determine distance to road at the residence in 2000 as a measure of traffic exposure. Using Cox proportional hazard models, we examined the association of distance to road and incident RA (1976–2004) with adjustment for a large number of potential confounders. Results: In models adjusted for age, calendar year, race, cigarette smoking, parity, lactation, menopausal status and hormone use, oral contraceptive use, body mass index, physical activity, and census-tract-level median income and house value, we observed an elevated risk of RA [hazard ratio (HR) = 1.31; 95% confidence interval (CI), 0.98–1.74] in women living within 50 m of a road, compared with those women living 200 m or farther away. We also observed this association in analyses among nonsmokers (HR = 1.62; 95% CI, 1.04–2.52), nonsmokers with rheumatoid factor (RF)-negative RA (HR = 1.77; 95% CI, 0.93–3.38), and nonsmokers with RF-positive RA (HR = 1.51; 95% CI, 0.82–2.77). We saw no elevations in risk in women living 50–200 m from the road. Conclusions: The observed association between exposure to traffic pollution and RA suggests that pollution from traffic in adulthood may be a newly identified environmental risk factor for RA.
Published Version: doi:10.1289/ehp.0800503
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717131/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4889442

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