gives the crude ORs and adjusted ORs of ovarian cancer for the four levels of overall tea consumption, years of tea drinking, green tea only, black or Oolong tea, and green and black tea drinking. The risk of ovarian cancer appears to decline with increasing consumption level and years of tea drinking. The adjusted OR was 0.39 for those drinking tea daily and 0.23 for those who drank >30 years, compared with never or seldom tea-drinkers. The corresponding linear trend was also significant. When different types of tea were considered, the inverse association was observed across all levels of green tea drinking, with a significant dose-response relationship. However, the reduced risk of ovarian cancer was only evident for daily drinking of black or Oolong tea, and green and black tea. Finally, the Hosmer and Lemeshow goodness-of-fit statistic ranged between 2.72 (P = 0.95) and 14 (P = 0.08), indicating no lack of fit for the logistic regression models.