Long-term exposure to air pollution and incidence of cardiovascular events in women
Abstract
BACKGROUND: Fine particulate air pollution has been linked to cardiovascular disease, but previous studies have assessed only mortality and differences in exposure between cities. We examined the association of long-term exposure to particulate matter of less than 2.5 microm in aerodynamic diameter (PM2.5) with cardiovascular events. METHODS: We studied 65,893 postmenopausal women without previous cardiovascular disease in 36 U.S. metropolitan areas from 1994 to 1998, with a median follow-up of 6 years. We assessed the women's exposure to air pollutants using the monitor located nearest to each woman's residence. Hazard ratios were estimated for the first cardiovascular event, adjusting for age, race or ethnic group, smoking status, educational level, household income, body-mass index, and presence or absence of diabetes, hypertension, or hypercholesterolemia. RESULTS: A total of 1816 women had one or more fatal or nonfatal cardiovascular events, as confirmed by a review of medical records, including death from coronary heart disease or cerebrovascular disease, coronary revascularization, myocardial infarction, and stroke. In 2000, levels of PM2.5 exposure varied from 3.4 to 28.3 microg per cubic meter (mean, 13.5). Each increase of 10 microg per cubic meter was associated with a 24% increase in the risk of a cardiovascular event (hazard ratio, 1.24; 95% confidence interval [CI], 1.09 to 1.41) and a 76% increase in the risk of death from cardiovascular disease (hazard ratio, 1.76; 95% CI, 1.25 to 2.47). For cardiovascular events, the between-city effect appeared to be smaller than the within-city effect. The risk of cerebrovascular events was also associated with increased levels of PM2.5 (hazard ratio, 1.35; 95% CI, 1.08 to 1.68). CONCLUSIONS: Long-term exposure to fine particulate air pollution is associated with the incidence of cardiovascular disease and death among postmenopausal women. Exposure differences within cities are associated with the risk of cardiovascular disease.
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Studies have reported broadly similar effect sizes for ambient particulate matter by smoking status.
“Studies124,159,160 have reported broadly similar effect sizes for ambient particulate matter by smoking status (never, former, and current smokers).”
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- Authors
- Miller, K. A., Siscovick, D. S., Sheppard, L., Shepherd, K., Sullivan, J. H., Anderson, G. L., & Kaufman, J. D.
- Affiliations
- University of Washington (US)
- Venue
- New England Journal of Medicine
- Publisher
- Massachusetts Medical Society
- Published
- 2007-02
- Volume
- 356
- Issue
- 5
- Pages
- 447-458
- ISSN
- 0028-4793 (ISSN-L)
- 1533-4406
- OpenAlex
- W2098189516
- Cited by
- 1,854
- References
- 27
- Citations by year
- 2026: 33 · 2025: 49 · 2024: 66 · 2023: 63 · 2022: 91 · 2021: 104 · 2020: 121 · 2019: 111 · 2018: 110 · 2017: 113 · 2016: 99 · 2015: 114 · 2014: 101 · 2013: 122 · 2012: 105
- FWCI
- 85.54
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- New England Journal of Medicine (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (5t32es007262-15)
- National Institute of Environmental Health Sciences (P30 ES-07033, T32-ES07262, K24ES013195, K23ES011139, P30ES007033)
- Topics
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
- Social Sciences › Sociology and Political Science › Environmental Justice and Health Disparities
- Keywords
- PM2.5, air pollution, cardiovascular disease, cardiovascular events, cardiovascular mortality, cerebrovascular disease, stroke, myocardial infarction, coronary artery disease, postmenopausal women, long-term exposure, coronary revascularization
- MeSH terms
- Aged, Air Pollution, Cerebrovascular Disorders, Environmental Exposure, Female, Humans, Middle Aged, Risk Factors, Urban Population, Cohort Studies, Incidence, Proportional Hazards Models, Myocardial Ischemia, Postmenopause, Particulate Matter
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