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Thursday, December 22, 2011

Soy Isoflavone and Lung Cancer

Posted by Chantel M. Contributed by US National Library of Medicine National Institutes of Health

In the study of "Isoflavone intake and risk of lung cancer: a prospective cohort study in Japan"by Shimazu T, Inoue M, Sasazuki S, Iwasaki M, Sawada N, Yamaji T, Tsugane S; Japan Public Health Center-based Prospective Study Group., posted in US National Library of Medicine National Institutes of Health, researchers found that During 11 y (671,864 person-years) of follow-up, we documented 481 male and 178 female lung cancer cases. In men we found an inverse association between isoflavone intake and risk of lung cancer in never smokers (n = 13,051; multivariate HR in the highest compared with the lowest quartile of isoflavone intake: 0.43; 95% CI: 0.21, 0.90; P for trend = 0.024) but not in current or past smokers. A similar, nonsignificant inverse association was seen in never-smoking women (n = 38,211; HR: 0.67; 95% CI: 0.41, 1.10; P for trend = 0.135). We also tested effect modification by smoking status (P for interaction = 0.085 in men and 0.055 in men and women combined) and concluded that in a large-scale, population-based, prospective study in Japan, isoflavone intake was associated with a decreased risk of lung cancer in never smokers

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