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dc.contributor.authorZhang, Zhi-Jiang
dc.contributor.authorZheng, Zhi-Jie
dc.contributor.authorKan, Haidong
dc.contributor.authorSong, Yiqing
dc.contributor.authorCui, Wei
dc.contributor.authorZhao, Genming
dc.contributor.authorKip, Kevin E.
dc.date.accessioned2013-04-05T14:41:13Z
dc.date.issued2011
dc.identifier.citationZhang, Zhi-Jiang, Zhi-Jie Zheng, Haidong Kan, Yiqing Song, Wei Cui, Genming Zhao, and Kevin E. Kip. 2011. Reduced risk of colorectal cancer with metformin therapy in patients with type 2 diabetes. Diabetes Care 34(10): 2323-2328.en_US
dc.identifier.issn0149-5992en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:10498782
dc.description.abstractObjective: Both in vitro and in vivo studies indicate that metformin inhibits cancer cell growth and reduces cancer risk. Recent epidemiological studies suggest that metformin therapy may reduce the risks of cancer and overall cancer mortality among patients with type 2 diabetes. However, data on its effect on colorectal cancer are limited and inconsistent. We therefore pooled data currently available to examine the association between metformin therapy and colorectal cancer among patients with type 2 diabetes. Research Design and Methods: The PubMed and SciVerse Scopus databases were searched to identify studies that examined the effect of metformin therapy on colorectal cancer among patients with type 2 diabetes. Summary effect estimates were derived using a random-effects meta-analysis model. Results: The analysis included five studies comprising 108,161 patients with type 2 diabetes. Metformin treatment was associated with a significantly lower risk of colorectal neoplasm (relative risk [RR] 0.63 [95% CI 0.50–0.79]; P < 0.001). After exclusion of one study that investigated colorectal adenoma, the remaining four studies comprised 107,961 diabetic patients and 589 incident colorectal cancer cases during follow-up. Metformin treatment was associated with a significantly lower risk of colorectal cancer (0.63 [0.47–0.84]; P = 0.002). There was no evidence for the presence of significant heterogeneity between the five studies (Q = 4.86, P = 0.30; I2 = 18%). Conclusions: From observational studies, metformin therapy appears to be associated with a significantly lower risk of colorectal cancer in patients with type 2 diabetes. Further investigation is warranted.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Diabetes Associationen_US
dc.relation.isversionofdoi:10.2337/dc11-0512en_US
dc.relation.hasversionhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3177711/pdf/en_US
dash.licenseLAA
dc.titleReduced Risk of Colorectal Cancer With Metformin Therapy in Patients With Type 2 Diabetesen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalDiabetes Careen_US
dash.depositing.authorSong, Yiqing
dc.date.available2013-04-05T14:41:13Z
dc.identifier.doi10.2337/dc11-0512*
dash.contributor.affiliatedSong, Yiqing


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