No Association Between Physical Activity and Risk of Ovarian Cancer: A Meta-analysis of Observational Studies

ZHAO Jitong; ZHOU Shengtao; LIN Xiaojuan

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No Association Between Physical Activity and Risk of Ovarian Cancer: A Meta-analysis of Observational Studies

ZHAO Jitong,ZHOU Shengtao,LIN Xiaojuan * #

Department of Obstetrics and Gynecology, Second West China Hospital, Sichuan University, Chengdu 610041

*Correspondence author

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Funding: Specialized Research Fund for the Doctoral Program of Higher Education（No.Grant No. 20120181120054）, Science and technology project of Chengdu （No.Grant No. 2015-HM01-00018-SF)）, Basic research project of Sichuan （No.Grant No. 2016JY0122）

Opened online:21 June 2016

Accepted by: none

Citation: ZHAO Jitong,ZHOU Shengtao,LIN Xiaojuan.No Association Between Physical Activity and Risk of Ovarian Cancer: A Meta-analysis of Observational Studies[OL]. [21 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4697499

In Objective: To evaluate the association between physical activity and the risk of ovarian cancer. Methods: We searched PubMed, EMBASE and the Cochrane Library for cohort and case-control studies which examined association between physical activity and ovarian cancer risk. A meta-analysis was conducted to estimate the summary relative risk (RR). Results: A total of 23 studies (twelve cohort studies and eleven case-control studies) met the inclusion criteria. In the meta-analysis of all included studies, when compared with the lowest level of physical activity, the overall RR of ovarian cancer for the highest level of physical activity was 0.88 (95% confidence interval [CI] 0.75-1.03]. In subgroup meta-analyses by study design, there was no significant association in cohort studies (RR=1.09, 95% CI 0.84-1.41). However, a negative association was found in case-control studies (RR=0.73,95% CI 0.61-0.88). Conclusion: Current data provide limited support for the hypothesis that physical activity reduces the risk of ovarian cancer. More high-quality studies are required to confirm this finding.

Keywords:physical activity; ovarian cancer; meta analysis

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