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Journal of Occupational & Environmental Medicine:
doi: 10.1097/JOM.0b013e318253356c
Original Articles

A Case-Crossover Study of Ambient Particulate Matter and Cardiovascular and Respiratory Medical Encounters Among US Military Personnel Deployed to Southwest Asia

Abraham, Joseph H. ScD, MS; Baird, Coleen P. MD, MPH

Section Editor(s): Teichman, Ron MD, MPH; Guest Editor

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Abstract

Objective: To evaluate the impact of ambient particulate matter (PM) on acute cardiorespiratory morbidity among US military personnel in southwest Asia.

Methods: We linked ambient PM data collected between December 2005 and June 2007 with personnel, medical, and meteorological data. We implemented a case-crossover analysis to estimate base-specific associations and pooled those estimates using meta-analytic methods.

Results: The adjusted odds ratios for a 10-μg/m3 increase in ambient PM2.5 and a qualifying medical encounter were 0.92 (95% confidence interval [CI]: 0.77 to 1.11) and 1.01 (95% CI: 0.95 to 1.07) for the current (lag_0) and previous (lag_1) days. The estimates for a 10-μg/m3 increase in PM10 were 0.99 (95% CI: 0.97 to 1.03) at lag_0, and 1.00 (95% CI: 0.97 to 1.02) at lag_1.

Conclusions: No statistically significant associations between PM and cardiorespiratory outcomes were observed in this young, relatively healthy, deployed military population.

©2012The American College of Occupational and Environmental Medicine

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