期刊
EPIDEMIOLOGY
卷 25, 期 1, 页码 35-43出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/EDE.0000000000000006
关键词
-
资金
- National Institute of Environmental Health Sciences [R01-ES012238]
- National Research Service Award from the National Heart, Lung and Blood Institute (NHLBI)
- US Department of Health and Human Services (DHHS) [T32-HL007055]
- NHLBI/DHHS [HHSN268201100046C, HHSN268201100001C, HHSN268201100002C, HHSN268201100003C, HHSN268201100004C]
- SAMSI grant, NSF [DMS 0635449]
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [T32HL007055] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [R01ES012238] Funding Source: NIH RePORTER
Background: Although ambient concentrations of particulate matter 10 m (PM10) are often used as proxies for total personal exposure, correlation (r) between ambient and personal PM10 concentrations varies. Factors underlying this variation and its effect on health outcome-PM exposure relationships remain poorly understood. Methods: We conducted a random-effects meta-analysis to estimate effects of study, participant, and environmental factors on r; used the estimates to impute personal exposure from ambient PM10 concentrations among 4,012 nonsmoking, participants with diabetes in the Women's Health Initiative clinical trial; and then estimated the associations of ambient and imputed personal PM10 concentrations with electrocardiographic measures, such as heart rate variability. Results: We identified 15 studies (in years 1990-2009) of 342 participants in five countries. The median r was 0.46 (range = 0.13 to 0.72). There was little evidence of funnel plot asymmetry but substantial heterogeneity of r, which increased 0.05 (95% confidence interval = 0.01 to 0.09) per 10 mu g/m(3) increase in mean ambient PM10 concentration. Substituting imputed personal exposure for ambient PM10 concentrations shifted mean percent changes in electrocardiographic measures per 10 mu g/m(3) increase in exposure away from the null and decreased their precision, for example, -2.0% (-4.6% to 0.7%) versus -7.9% (-15.9% to 0.9%), for the standard deviation of normal-to-normal RR interval duration. Conclusions: Analogous distributions and heterogeneity of r in extant meta-analyses of ambient and personal PM2.5 concentrations suggest that observed shifts in mean percent change and decreases in precision may be generalizable across particle size.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据