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meta-analysis of the Relationship between Passive Smoking Population in China and Lung Cancer

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Author(s): Hui ZHAO | Jundong GU | Hongrui XU | Bingjun YANG | Youkui HAN | Li LI | Shuzhong LIU | Hong YAO

Journal: Chinese Journal of Lung Cancer
ISSN 1009-3419

Volume: 13;
Issue: 6;
Start page: 617;
Date: 2010;
Original page

Keywords: Lung neoplasms | Passive smoking | meta-analysis

ABSTRACT
Background and objective Studies of passive smoking exposure in China however are of particular interest, because of the high lung cancer rate in people who are mostly non-smokers. The aim of this study is to explore the relationship between passive smoking and lung cancer among non-smoking Chinese. Methods By searching Medline, PubMed, CENTRAL (the Cochrane central register of controlled trials), CBM, CNKI and VIP, et al, we collected both domestic and overseas published documents between 1987 and 2007 on passive smoking and lung cancer among non-smoking Chinese. Random or fixed effect models were applied to conduct meta-analysis on the case control study results, and the combined odds ratio (OR) and the 95% confidence interval (CI) were calculated as well. Results Sixteen documents were included into the combined analysis, which indicated that there was statistical significance between passive smoking and lung cancer (OR=1.13, 95%CI: 1.05-1.21, P=0.001). It was significant of lung cancer among non-smoking subjects associated with amount of tobacco passively smoked more than 20 cigarettes daily, with life period in adulthood passive smoking exposure, with gender female, and with exposure to workplace. The P value, OR and 95%CI were P=0.000 3, OR=1.78, 95%CI: 1.30-2.43; P=0.000 1, OR=1.50, 95%CI: 1.23-1.83; P=0.000 7, OR=1.50, 95%CI: 1.19-1.90; P

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