Table 1.
Demographic characteristics of prostatic cancer cases and controls
| Characteristics | Controls N = 352 (%) | Case N = 352 (%) | P value |
|---|---|---|---|
| Age at reference (years) | |||
| ≤65 (%) | 176 (50.0 %) | 180 (51.1 %) | |
| ≥66 (%) | 176 (50.0 %) | 172 (48.9 %) | 0.76a |
| Smoking status | |||
| Never | 113 (32.1 %) | 127 (36.1 %) | |
| Ever | 239 (67.9 %) | 225 (63.9 %) | 0.27a |
| Current smoker | 69 (19.6 %) | 56 (15.9 %) | 0.14a |
| Ex-smoker | 170 (48.3 %) | 169 (48.0 %) | 0.47a |
| Mean age (years), mean ± SD | 65.0 (± 6.5) | 65.0 (± 6.5) | 0.98b |
a P values were calculated form chi-square test
b P values were calculated form t test