Folate intake and risk of bladder cancer: a meta-analysis of epidemiological studies |
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Authors: | Huadong He |
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Institution: | Department of Urology, Hangzhou First People’s Hospital, Affiliated Hangzhou Hospital of Nanjing Medical University
Hangzhou, ZhejiangChina |
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Abstract: | Epidemiological studies have reported conflicting results between folate intake and bladder cancer risk. We conducted a meta-analysis of epidemiological studies published between 1996 and June 2013 on the relationship between folate intake and bladder cancer. We quantified associations with bladder cancer using meta-analysis of risk estimates (REs) associated to the highest versus the lowest category of folate intake using random effect models. Seven cohort and six case-control studies were eligible for inclusion. A significantly decreased risk with bladder cancer was observed in overall folate intake group (RE?=?0.84; 95% CI, 0.72–0.96) and subgroup of case-control studies (RE?=?0.73; 95% CI, 0.57–0.89), but not in cohort studies (RE?=?0.96; 95% CI, 0.81–1.10) when comparing the highest with the lowest category of folate intake. No heterogeneity and publication bias were observed across studies. Although the current evidence, mainly based on data from case-control studies, supports an inverse association between folate intake and bladder cancer, additional large and well-designed cohort studies are needed before definitive conclusions can be drawn. |
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Keywords: | Folate meta-analysis prostate cancer |
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