Passive Smoking and Risk of Type 2 Diabetes: A Meta-Analysis of Prospective Cohort Studies |
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| Authors: | Ying Wang Jie Ji Yu-jian Liu Xuan Deng Qi-qiang He |
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| Institution: | 1. School of Public Health, Wuhan University, Wuhan, P. R. China.; 2. School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P. R. China.; 3. Global Health Institute, Wuhan University, Wuhan, P. R. China.; Universidad Peruana de Ciencias Aplicadas (UPC), Peru, |
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| Abstract: | Backgrounds/ObjectiveThe prevalence of diabetes is increasing rapidly all over the world. However, studies on passive smoking and type 2 diabetes have not been systematically assessed. Therefore, we conducted a meta-analysis to explore whether an association exists between passive smoking and risk of type 2 diabetes.MethodsWe searched PubMed, EMBASE, Cochrane library and Web of Science up to April 9th, 2013, to identify prospective cohort studies that assessed passive smoking and risk of type 2 diabetes. The fixed-effect model was used to calculate the overall relative risk (RR).Result4 prospective cohort studies were included for analysis, with a total of 112,351 participants involved. The pooled RR was 1.28 (95% confidence interval (CI) 1.14 to 1.44) comparing those who were exposed to passive smoking with those who were not. Subgroup, sensitivity analysis and publication bias test suggested the overall result of this analysis was robust.ConclusionsPassive smoking is associated with a significantly increased risk of type 2 diabetes. Further well-designed studies are warranted to confirm this association. |
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