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Green and black tea intake in relation to prostate cancer risk among Singapore Chinese (August, 2012)
ABSTRACT:
 
There was no association between daily green tea intake and prostate cancer risk, compared with no green tea intake. For black tea, a statistically significant positive association and trend were observed for daily intake compared with no black tea intake.
 
Methods:
 
•Tea consumption data for 27,293 men were collected at baseline (between 1993 and 1998) using a validated food frequency questionnaire.
•After an average of 11.2years of follow-up, 298 men had developed prostate cancer.
•Proportional hazards regression methods were used to assess the associations between tea intake and prostate cancer risk.
 
Results:
 
•There was no association between daily green tea intake and prostate cancer risk, compared with no green tea intake [hazard ratio (HR)=1.08; 95 % confidence interval (CI) 0.79, 1.47].
•For black tea, a statistically significant positive association and trend were observed for daily intake compared with no black tea intake (HR=1.41, 95 % CI 1.03, 1.92; p for trend<0.01).
 
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