Table 2.
Entry characteristics of men subsequently diagnosed with prostate cancer and men found to be free of prostate cancer, placebo arm of the Prostate Cancer Prevention Trial
| Subsequent prostate cancer diagnosis | |||
|---|---|---|---|
| No | Yes | P | |
| N | 4,335 | 1,251 | |
| Mean age (years) | 62.6 | 63.6 | < 0.0001 |
| Nonwhite (%) | 6.5 | 7.0 | 0.52 |
| Mean body mass index (kg/m2) | 27.4 | 27.2 | 0.11 |
| Mean weight (lb) | 192.0 | 190.9 | 0.27 |
| Mean height (in) | 69.8 | 67.0 | 0.07 |
| Mean waist circumference (cm) | 100.2 | 100.0 | 0.65 |
| Education (%) | |||
| < High school | 1.1 | 1.4 | 0.29 |
| High school | 16.8 | 15.0 | 0.12 |
| ≥ High school | 82.1 | 83.5 | 0.26 |
| Cigarette smoking (%) | |||
| Never | 33.9 | 36.7 | 0.07 |
| Former | 59.4 | 56.4 | 0.06 |
| Current | 6.7 | 6.9 | 0.80 |
| Physical activity (%) | |||
| Sedentary | 16.7 | 16.9 | 0.87 |
| Light | 42.1 | 40.6 | 0.34 |
| Moderate | 30.8 | 33.5 | 0.07 |
| Active | 10.0 | 8.8 | 0.21 |
| Family history of prostate cancer (%) | 15.7 | 21.2 | < 0.0001 |
| Mean PSA (ng/mL) | 1.2 | 1.5 | < 0.0001 |
| History of diabetes (%) | 5.2 | 4.1 | 0.10 |
| History of heart attack (%) | 4.1 | 4.4 | 0.65 |
| Regular aspirin use (%) | 49.0 | 53.5 | 0.005 |
| Vasectomy (%) | 34.0 | 33.8 | 0.90 |
| Alcohol intake (g/day) | 9.7 | 9.9 | 0.77 |
| Red meat intake (servings/day) | 0.61 | 0.60 | 0.31 |
| Energy-adjusted cholesterol intake (mg/day) | 281 | 281 | 0.91 |
| Calcium intake, diet and supplements (mg/day) | 922 | 939 | 0.23 |
*
All characteristics (except for age) are age-adjusted and were calculated as least squares means from linear regression models.