title: The association of tea consumption with ovarian cancer risk: A metaanalysis.
abstract: OBJECTIVE
  This metaanalysis was undertaken to evaluate the relationship between tea intake and ovarian cancer risk.
  
  
  METHODS
  A systematic literature search up to September 2006 was performed in Medline, Embase, CANCERLIT, and the Cochrane Database. The summary relative risk was calculated. A sensitivity analysis was conducted to test the influence of each single study. Heterogeneity and publication bias were also evaluated.
  
  
  RESULTS
  Two cohort and 7 case-control studies were included. The combined relative risk did not show that tea consumption was associated with a reduced ovarian cancer risk (relative risk, 0.84; 95% confidence interval, 0.66-1.07). When the analyses were stratified into subgroups, there was no evidence that study design substantially influenced the estimate of effects. The sensitivity analysis which means removing one study at a time confirmed the stability of our results.
  
  
  CONCLUSIONS
  Our findings did not support that tea consumption was related to the decreased risk of ovarian cancer.
authors: Key Laboratory of Reproductive Medicine, Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China.
authors: Bo
authors: B
authors: Zhou
authors: Li
authors: L
authors: Yang
authors: Liansheng
authors: L
authors: Wang
authors: Yanping
authors: Y
authors: Shi
authors: Huaijun
authors: H
authors: Zhu
authors: Naping
authors: N
authors: Tang
authors: Bin
authors: B
authors: Wang
mesh_terms: D001628:Beverages; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000517:prevention & control*; D012306:Risk; D013662:Tea
chemical_list: D013662:Tea