Abstract:
BACKGROUND:The relationship of fine particulate matter < 2.5 microm in diameter (PM(2.5)) air pollution with mortality and cardiovascular disease is well established, with more recent long-term studies reporting larger effect sizes than earlier long-term studies. Some studies have suggested the coarse fraction, particles between 2.5 and 10 microm (PM(10-2.5)), may also be important. With respect to mortality and cardiovascular events, questions remain regarding the relative strength of effect sizes for chronic exposure to fine and coarse particles. OBJECTIVES:We examined the relationship of chronic PM(2.5) and PM(10-2.5) exposures with all-cause mortality and fatal and nonfatal incident coronary heart disease (CHD), adjusting for time-varying covariates. METHODS:The current study included women from the Nurses' Health Study living in metropolitan areas of the northeastern and midwestern United States. Follow-up was from 1992 to 2002. We used geographic information systems-based spatial smoothing models to estimate monthly exposures at each participant's residence. RESULTS:We found increased risk of all-cause mortality [hazard ratio (HR), 1.26; 95% confidence interval (CI), 1.02-1.54] and fatal CHD (HR = 2.02; 95% CI, 1.07-3.78) associated with each 10-microg/m(3) increase in annual PM(2.5) exposure. The association between fatal CHD and PM(10-2.5) was weaker. CONCLUSIONS:Our findings contribute to growing evidence that chronic PM(2.5) exposure is associated with risk of all-cause and cardiovascular mortality.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Puett RC,Hart JE,Yanosky JD,Paciorek C,Schwartz J,Suh H,Speizer FE,Laden Fdoi
10.1289/ehp.0900572subject
Has Abstractpub_date
2009-11-01 00:00:00pages
1697-701issue
11eissn
0091-6765issn
1552-9924journal_volume
117pub_type
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