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Genital use of talc and risk of ovarian cancer: a meta-analysis

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Some epidemiological studies suggest an association between genital use of talc powders and increased risk of ovarian cancer, but the evidence is not consistent. We performed a meta-analysis of epidemiological studies to formally evaluate this suspected association. A systematic search was conducted in Medline, Embase, and Scopus, leading to the identification of 24 case–control studies and three cohort studies. In the meta-analysis, we used a random-effect model to calculate summary estimates of the association between genital use of talc and occurrence of ovarian cancer. We assessed potential sources of between-study heterogeneity and presence of publication bias. The summary relative risk (RR) for ever use of genital talc and ovarian cancer was 1.22 [95% confidence interval (CI): 1.13–1.30]. The RR for case–control studies was 1.26 (95% CI: 1.17–1.35) and for cohort studies was 1.02 (95% CI: 0.85–1.20, P heterogeneity=0.007). Serous carcinoma was the only histologic type for which an association was detected (RR: 1.24; 95% CI: 1.15–1.34). There was a weak trend in RR with duration and frequency of genital talc use. This meta-analysis resulted in a weak but statistically significant association between genital use of talc and ovarian cancer, which appears to be limited to serous carcinoma with suggestion of dose-response. The heterogeneity of results by study design however, detracts from a causal interpretation of this association.
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Keywords: meta-analysis; ovarian cancer; talc

Document Type: Research Article

Affiliations: 1: Faculty of Medicine, University of Dresden, Dresden, Germany 2: Ramboll Environ, Amherst, Massachusetts 3: University of South Florida College of Public Health, Tampa, Florida 4: Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, New York, USA

Publication date: May 1, 2018

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