Table II.
Characteristics of Caucasians in the Health Professionals Follow-Up Study
| Variable | Cases n = 659, N (%) | Controls n = 656, N (%) |
| Age (year) (matching factor) | ||
| ≤65 | 297 (45) | 302 (46) |
| >65 | 362 (55) | 354 (54) |
| BMI (kg/m2) | ||
| ≤25 | 405 (61) | 489 (59) |
| 25–30 | 221 (34) | 221 (34) |
| >30 | 33 (5) | 46 (7) |
| Family history of prostate cancer | ||
| No | 528 (80) | 557 (85) |
| Yes | 131 (20) | 99 (15) |
| Age started smoking | 23.0 ± 5.3 | 22.9 ± 5.4 |
| Lifetime average cigarettes per day | 10.5 ± 6.3 | 10.9 ± 6.7 |
| Alcohol (g/day) | 11.4 ± 14.9 | 10.5 ± 14.7 |
| Prostate-specific antigen at diagnosis of prostate cancer (ng/ml) | 11.3 ± 21.0 (n = 479) | Not applicable |
| Stage | ||
| T1b-T3a | 517 (79) | Not applicable |
| T3b, T4, N1, M1 or death due to prostate cancer | 55 (8) | |
| Missing | 87 (13) | |
| Gleason sum | ||
| 2–4 | 44 (7) | Not applicable |
| 5–6 | 320 (49) | |
| 7 | 164 (25) | |
| 8–10 | 55 (8) | |
| Missing | 76 (12) | |
| Aggressiveness | ||
| No | 419 (64) | Not applicable |
| Yes | 240 (36) | |
| Missing | 0 | |
| Death due to prostate cancer | ||
| No | 641 (97) | Not applicable |
| Yes | 18 (3) | |
| Prostatitis | ||
| ≤60 | 35 (24) | 18 (15) |
| >60 | 111 (76) | 102 (85) |
Aggressiveness defined as stages T3b, T4, N1, M1 or death due to prostate cancer or Gleason sum ≥7.