Association between reported exposure to road traffic and respiratory symptoms in children: evidence of bias

International Journal of Epidemiology
Claudia E KuehniMichael Silverman

Abstract

Many studies showing effects of traffic-related air pollution on health rely on self-reported exposure, which may be inaccurate. We estimated the association between self-reported exposure to road traffic and respiratory symptoms in preschool children, and investigated whether the effect could have been caused by reporting bias. In a random sample of 8700 preschool children in Leicestershire, UK, exposure to road traffic and respiratory symptoms were assessed by a postal questionnaire (response rate 80%). The association between traffic exposure and respiratory outcomes was assessed using unconditional logistic regression and conditional regression models (matching by postcode). Prevalence odds ratios (95% confidence intervals) for self-reported road traffic exposure, comparing the categories 'moderate' and 'dense', respectively, with 'little or no' were for current wheezing: 1.26 (1.13-1.42) and 1.30 (1.09-1.55); chronic rhinitis: 1.18 (1.05-1.31) and 1.31 (1.11-1.56); night cough: 1.17 (1.04-1.32) and 1.36 (1.14-1.62); and bronchodilator use: 1.20 (1.04-1.38) and 1.18 (0.95-1.46). Matched analysis only comparing symptomatic and asymptomatic children living at the same postcode (thus exposed to similar road traffic) showed sim...Continue Reading

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Citations

Oct 4, 2007·International Journal of Epidemiology·Claudia E KuehniMichael Silverman
Nov 30, 2006·Current Opinion in Pulmonary Medicine·Jeremy A Sarnat, Fernando Holguin
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May 27, 2008·International Journal of Hygiene and Environmental Health·Barbara HoffmannKarl-Heinz Jöckel
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