title: Tea consumption and risk of bladder cancer: a meta-analysis.
abstract: BACKGROUND
  Tea consumption has been reported to be associated with an decreased risk of several types of cancers. However, the results based on epidemiological studies on the association of tea consumption with bladder cancer were inconsistent. This meta-analysis was undertaken to evaluate the relationship between tea consumption and bladder cancer risk.
  
  
  METHODS
  Eligible studies were retrieved via both computer searches and review of references. The summary relative risk (RR) with 95% confidence interval (CI) was calculated.
  
  
  RESULTS
  Twenty three studies met the inclusion criteria of the meta-analysis. No association with bladder cancer was observed in either overall tea consumption group (OR =0.94, 95% CI 0.85-1.04) or subgroups stratified by sex, study design, geographical region or tea types.
  
  
  CONCLUSIONS
  Our findings did not support that tea consumption was related to the decreased risk of bladder cancer.
authors.affiliation: Department of Urology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang Province, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
authors.forename: Bo
authors.initials: B
authors.lastname: Xie
authors.forename: Qiqi
authors.initials: Q
authors.lastname: Mao
authors.forename: Debo
authors.initials: D
authors.lastname: Kong
authors.forename: Yiwei
authors.initials: Y
authors.lastname: Lin
authors.forename: Xiangyi
authors.initials: X
authors.lastname: Zheng
mesh_terms: D000818:Animals; D016022:Case-Control Studies; D015331:Cohort Studies; D006801:Humans; D016017:Odds Ratio; D012307:Risk Factors; D013662:Tea / Q000009:adverse effects; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology*
chemical_list: D013662:Tea