Factors Influencing Time-Location Patterns and Their Impact on Estimates of Exposure: The Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air)

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Citation

Spalt, Elizabeth W.; Curl, Cynthia L.; Allen, Ryan W.; Cohen, Martin A.; Williams, Kayleen; Hirsch, Jana A.; Adar, Sara D.; & Kaufman, Joel D. (2016). Factors Influencing Time-Location Patterns and Their Impact on Estimates of Exposure: The Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air). Journal of Exposure Science and Environmental Epidemiology, 26(4), 341-348. PMCID: PMC4641036

Abstract

We assessed time-location patterns and the role of individual- and residential-level characteristics on these patterns within the Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air) cohort and also investigated the impact of individual-level time-location patterns on individual-level estimates of exposure to outdoor air pollution. Reported time-location patterns varied significantly by demographic factors such as age, gender, race/ethnicity, income, education, and employment status. On average, Chinese participants reported spending significantly more time indoors and less time outdoors and in transit than White, Black, or Hispanic participants. Using a tiered linear regression approach, we predicted time indoors at home and total time indoors. Our model, developed using forward-selection procedures, explained 43% of the variability in time spent indoors at home, and incorporated demographic, health, lifestyle, and built environment factors. Time-weighted air pollution predictions calculated using recommended time indoors from USEPA overestimated exposures as compared with predictions made with MESA Air participant-specific information. These data fill an important gap in the literature by describing the impact of individual and residential characteristics on time-location patterns and by demonstrating the impact of population-specific data on exposure estimates.

URL

http://dx.doi.org/10.1038/jes.2015.26

Reference Type

Journal Article

Year Published

2016

Journal Title

Journal of Exposure Science and Environmental Epidemiology

Author(s)

Spalt, Elizabeth W.
Curl, Cynthia L.
Allen, Ryan W.
Cohen, Martin A.
Williams, Kayleen
Hirsch, Jana A.
Adar, Sara D.
Kaufman, Joel D.

PMCID

PMC4641036

ORCiD

Hirsch - 0000-0003-3355-5558