Study: Childhood Asthma and Secondhand Smoke Exposure

In a study published in the October edition of Environmental Health Perspectives, researchers conducted an analysis of 38 studies published between 1970 and 2005 to try and uncover consistent patterns of the association between household secondhand tobacco smoke exposure and development of childhood asthma. After adjusting for confounding characteristics, the data showed consistent patterns of association between secondhand smoke exposure and childhood asthma development. The relationship is even more apparent among older children than younger children. This new finding indicates that exposure duration may be a more important factor in the development of asthma than previously understood, and suggests that secondhand smoke exposure could be a more fundamental and widespread cause of childhood asthma than some previous analyses have indicated. To view the study, visit //www.ehponline.org/members/2007/10155/10155.pdf

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