Lifetime secondhand smoke exposure and childhood and adolescent asthma: findings from the PIAMA cohort.

Environ Health · 2017 · PMC5324208 · PMID 28231798

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a decreasing trendno p-value reported

Baseline characteristics were similar for the study population and the excluded population except for higher prevalence of high parental education and breastfeeding and a lower prevalence of pet ownership in the study population (Additional file 1 : Table S2). A decreasing trend in ETS exposure was noted.

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