Demographic and health-related characteristics of SELECT case–cohort sample
| Prostate cancer cases (n = 1,731) | Cohorta (n = 3,203) | |
|---|---|---|
| Age, y | ||
| Mean ± SD | 63.5 ± 6.1 | 63.3 ± 6.5 |
| 50–54 | 44 (2.5) | 128 (4.0) |
| 55–59 | 461 (26.6) | 856 (26.7) |
| 60–64 | 520 (30.0) | 935 (29.2) |
| 65–69 | 408 (23.6) | 750 (23.4) |
| ≥70 | 298 (17.2) | 534 (16.7) |
| Race | ||
| White | 1,394 (80.5) | 2,213 (69.1) |
| African American | 250 (14.4) | 802 (25.0) |
| Other/unknown | 87 (5.0) | 188 (5.9) |
| BMI, kg/m2 | ||
| Mean ± SD | 28.5 ± 4.3 | 28.8 ± 4.6 |
| <25 | 335 (19.4) | 615 (19.2) |
| 25–<30 | 875 (50.5) | 1,506 (47.0) |
| ≥30 | 521 (30.1) | 1,082 (33.8) |
| Gleason grade | ||
| 2–6 | 1,014 (58.6) | 128 (63.7)b |
| 7–10 | 502 (28.9) | 60 (29.9) |
| 8–10 | 104 (6.0) | 12 (6.0) |
| Family history of prostate cancer | ||
| No | 1,231 (71.1) | 2,729 (85.2) |
| Yes | 500 (28.9) | 474 (14.8) |
| Trial arm | ||
| Placebo | 407 (23.5) | 790 (24.7) |
| Vitamin E | 474 (27.4) | 813 (25.4) |
| Selenium | 431 (24.9) | 800 (25.0) |
| Vitamin E + selenium | 419 (24.2) | 800 (25.0) |