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There is "no clear link" between secondhand smoke and lung cancer, a study led by researchers at Stanford University has found.
After a decade-long study of more than 76,000 women, the researchers concluded that while there is still a strong association between smoking and lung cancer, there is no significant relationship between the cancer and exposure to passive smoke.
Published in the latest Journal of the National Cancer Institute, the study found that among current smokers, lung cancer was 13 times more common than in non-smokers, and four times more common among former smokers. But for women who had never smoked, it found that exposure to secondhand smoke did not significantly increase the risk of lung cancer.
http://www.independent.co.uk/life-s...lung-cancer-and-secondhand-smoke-9004077.html
After a decade-long study of more than 76,000 women, the researchers concluded that while there is still a strong association between smoking and lung cancer, there is no significant relationship between the cancer and exposure to passive smoke.
Published in the latest Journal of the National Cancer Institute, the study found that among current smokers, lung cancer was 13 times more common than in non-smokers, and four times more common among former smokers. But for women who had never smoked, it found that exposure to secondhand smoke did not significantly increase the risk of lung cancer.
http://www.independent.co.uk/life-s...lung-cancer-and-secondhand-smoke-9004077.html