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• Longer Second-Hand Smoke Exposure Increases Lung Cancer Risk in Never-Smokers 

Exposure to second-hand smoke from spousal, workplace and social sources confers a 22% increased risk of lung cancer in people who never smoked, according to a pooled analysis of European and American cohorts. . . .

Paul Brennan, PhD, with the International Agency for Research on Cancer, Lyon, France, and colleagues evaluated the risk of lung cancer due to second-hand smoke exposure in non-smokers. . . .

The authors conclude that this study "provides firm evidence for a dose-response relationship between lung cancer risk and duration of exposure to second-hand smoke for the 3 main sources of exposure: spousal, workplace and social." They add that this study "emphasizes the importance of protecting nonsmokers from second-hand smoke."

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[This study] provides firm evidence for a dose-response relationship between lung cancer risk and duration of exposure to second-hand smoke for the 3 main sources of exposure: spousal, workplace and social.
Paul Brennan, PhD, with the International Agency for Research on Cancer, Lyon, France, and colleagues.