Question:

20 Use the paragraph below to answer questions :

Breast cancer is the most common malignancy in women worldwide. Tea has anticarcinogenic effects against breast cancer in laboratory studies. However, epidemiologic evidence that tea protects against breast cancer has been inconsistent. A study was conducted in Southeast China between 2004 and 2005. The cases were 1009 female patients aged 20-87 years with histologically confirmed breast cancer. The 1009 age-matched controls were healthy women randomly recruited from breast disease clinics. Information on duration, frequency, quantity, preparation, type of tea consumption, diet and lifestyle were collected by face-to-face interview using a validated and reliable questionnaire. Conditional logistic regression analyses were used to estimate odds ratios (ORs) and associated 95% confidence intervals. Compared with non-tea drinkers, green tea drinkers tended to reside in urban areas, have better education and have higher consumption of coffee, alcohol, soy, vegetables and fruits. After adjusting established and potential confounders, green tea consumption was associated with a reduced odds of breast cancer. The ORs were 0.87 (0.73-1.04) in women consuming 1-249 g of dried green tea leaves per annum, 0.68 (0.54-0.86) for 250-499 g per annum, 0.59 (0.45-0.77) for 500-749 g per annum and 0.61 (0.48-0.78) for >or=750 g per annum, with a statistically significant test for trend (P

Which OR for the association of dried green tea leaves (which amount) presented by the study shows the strongest association between green tea and breast cancer?

18 Claim: p