1. Effect of Metformin on Cancer Risk and Treatment Outcome of Prostate Cancer: A Meta-Analysis of Epidemiological Observational Studies.
- Author
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Yu, Hongliang, Yin, Li, Jiang, Xuesong, Sun, Xiujin, Wu, Jing, Tian, Hao, Gao, Xianshu, and He, Xia
- Subjects
METFORMIN ,PROSTATE cancer risk factors ,PROSTATE cancer treatment ,HEALTH outcome assessment ,EPIDEMIOLOGY ,META-analysis ,ANTINEOPLASTIC agents ,CANCER relapse - Abstract
Background: Laboratory studies have shown the anti-tumor effect of metformin on prostate cancer. However, recent epidemiological studies have yielded inconclusive results. Methods: We searched PubMed database from the inception to May 30 2014 for studies which assessed the effect of metformin use on cancer risk of prostate cancer, biochemical recurrence (BCR) and all-cause mortality of patients with prostate cancer. The pooled results and 95% confidence intervals (CIs) were estimated by random-effect model. Results: Twenty-one studies were eligible according to the inclusion criteria. Based on the pooled results of available observational studies, metformin use was significantly associated with a decreased cancer risk (14 datasets, 963991 male subjects, odds ratio: 0.91, 95% CI: 0.85–0.97) and BCR (6 datasets, 2953 patients, hazard ratio: 0.81, 95% CI: 0.68–0.98) of prostate cancer. However, the association of metformin use with all-cause mortality of patients with prostate cancer was not significant (5 datasets, 9241 patients, hazard ratio: 0.86, 95% CI: 0.64–1.14). Conclusion: Results suggest that metformin use appears to be associated with a significant reduction in the cancer risk and BCR of prostate cancer, but not in all-cause mortality of patients with prostate cancer. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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