The largest study to date on the effects of childhood exposure to environmental
tobacco smoke on later respiratory disease has found that early exposure to
secondhand smoke can produce lifelong respiratory problems. The findings were
published in the August 30 online edition of Thorax (David
et al. http://thorax.bmjjournals.com/).
In the study, which involved 35 000 adult nonsmokers in Singapore,
researchers at the National Institute of Environmental Health Sciences, the
University of Minnesota, and the National University of Singapore found that
those who lived with one or more smokers during childhood were more than twice
as likely to have chronic dry cough in adulthood compared with those who did
not grow up living with a smoker.
Hampton T. Secondhand Smoke Effects. JAMA. 2005;294(16):2016. doi:10.1001/jama.294.16.2016-c