title: Green tea drinking habits and gastric cancer in southwest China.
abstract: OBJECTIVE
  The purpose of this study was to investigate relationships between green tea consumption and gastric cancer development.
  
  
  METHODS
  A population-based case-control study including 200 cases and 200 controls was conducted in the southwest area of China from May 2010 to February 2011. A self-designed questionnaire was used to collect data on factors influencing gastric cancer development, including tea drinking, conditional logistic regression being used to calculate odds ratios (ORs) and corresponding 95% confidence intervals (95% CIs).
  
  
  RESULTS
  Cases with higher economic status had a reduced risk of gastric cancer, while those with cancer family history, drinking and smoking showed increased risk. Hot and very hot tea temperature was significantly related to high risk of gastric cancer with ORs (95%Cl) of 1.82 (1.03-3.52) and 3.07 (1.78-7.36), respectively. Further analysis indicated elevated risk of gastric cancer in former drinkers, former smokers and current drinkers when the measured tea temperature was hot.
  
  
  CONCLUSIONS
  Drinking tea at high temperature increases the gastric cancer risk, especially in drinkers and smokers.
authors.affiliation: Department of Clinical Laboratory, The First People's Hospital of Yunnan Province, Kunming, China. maoxiaoqin555@126.com
authors.forename: Xiao-Qin
authors.initials: XQ
authors.lastname: Mao
authors.forename: Xiong-Fei
authors.initials: XF
authors.lastname: Jia
authors.forename: Guang
authors.initials: G
authors.lastname: Zhou
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Niu
authors.forename: Feng-Liang
authors.initials: FL
authors.lastname: Li
authors.forename: Hai-Yun
authors.initials: HY
authors.lastname: Liu
authors.forename: Rui
authors.initials: R
authors.lastname: Zheng
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
mesh_terms: D000428:Alcohol Drinking / Q000009:adverse effects / Q000453:epidemiology; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D016001:Confidence Intervals; D005260:Female; D006184:Habits; D006358:Hot Temperature; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000209:etiology; D011795:Surveys and Questionnaires; D013662:Tea
chemical_list: D013662:Tea