Table 2.
Hazard ratios (HRs) and 95 % confidence intervals (CIs) for tea intake and prostate cancer risk in the Singapore Chinese Health Study
| Green tea intake
|
Black tea intake
|
|||||
|---|---|---|---|---|---|---|
| Cases, n | HR (95 % CI)a | HR (95 % CI)b | Cases, n | HR (95 % CI)a | HR (95 % CI)c | |
| None | 153 | 1.0 (ref) | 1.0 (ref) | 156 | 1.0 (ref) | 1.0 (ref) |
| Monthly | 33 | 1.06 (0.73, 1.55) | 1.07 (0.73, 1.56) | 22 | 1.17 (0.75, 1.84) | 1.17 (0.75, 1.83) |
| Weekly | 58 | 1.09 (0.80, 1.47) | 1.09 (0.80, 1.48) | 67 | 1.40 (1.05, 1.87) | 1.40 (1.05, 1.86) |
| Daily | 54 | 1.08 (0.79, 1.47) | 1.08 (0.79, 1.48) | 53 | 1.41 (1.03, 1.92) | 1.41 (1.03, 1.92) |
| 1 cup/day | 29 | 1.22 (0.82, 1.82) | 1.22 (0.82, 1.82) | 40 | 1.51 (1.06, 2.13) | 1.50 (1.06, 2.13) |
| ≥2 cups/day | 25 | 0.95 (0.62, 1.45) | 0.95 (0.62, 1.45) | 13 | 1.17 (0.67, 2.07) | 1.17 (0.67, 2.07) |
| p for trendd | 0.6 | 0.6 | <0.01 | <0.01 | ||
| p for trende | 0.7 | 0.7 | 0.01 | 0.01 | ||
SD standard deviation
a
Adjusted models include variables for age, dialect group, interview year, education, body mass index and smoking history
b
Adjusted models include the covariates listed under (b) and black tea intake
c
Adjusted models include the covariates listed under (b) and green tea intake
d
Calculated from the model with four categories of tea intake: none, monthly, weekly, daily
e
Calculated from the model with five categories of tea intake: none, monthly, weekly, 1 cup/day, ≥2 cups/day