Ambient air pollution and emergency department visits for asthma: a multi-city assessment of effect modification by age

Journal of Exposure Science & Environmental Epidemiology
Brooke A AlhantiStefanie Ebelt Sarnat

Abstract

Previous studies have found strong associations between asthma morbidity and major ambient air pollutants. Relatively little research has been conducted to assess whether age is a factor conferring susceptibility to air pollution-related asthma morbidity. We investigated the short-term relationships between asthma emergency department (ED) visits and ambient ozone (O3), carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), and fine particulate matter (PM2.5) in Atlanta (1993-2009), Dallas (2006-2009), and St. Louis (2001-2007). City-specific daily time-series analyses were conducted to estimate associations by age group (0-4, 5-18, 19-39, 40-64, and 65+ years). Sub-analyses were performed stratified by race and sex. City-specific rate ratios (RRs) were combined by inverse-variance weighting to provide an overall association for each strata. The overall RRs differed across age groups, with associations for all pollutants consistently strongest for children aged 5-18 years. The patterns of association across age groups remained generally consistent when models were stratified by sex and race, although the strong observed associations among 5-18 year olds appeared to be partially driven by non-white and male patients...Continue Reading

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Citations

Aug 9, 2016·Journal of Preventive Medicine and Public Health = Yebang Ŭihakhoe Chi·Hyungryul LimWon-Jun Choi
Jul 17, 2016·Journal of Epidemiology and Community Health·Cassandra R O'LenickStefanie Ebelt Sarnat
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