Table 1. Baseline characteristics of the study population.
| Characteristics | Casesn = 629 | Controlsn = 622 | P-valuesa |
| Age (mean, range) | 66.1 (45.8–94.5) | 60.9 (45.1–88.8) | <0.001 |
| Caribbean origin (n, %) | |||
| French West Indies | 609 (96.8) | 572 (92.0) | <0.001 |
| Haiti or Dominica | 20 (3.1) | 50 (8.0) | |
| Education (n, %) | |||
| Primary | 384 (61.4) | 342 (57.8) | 0.02 |
| Secondary | 156 (25.0) | 187 (31.6) | |
| High school and higher | 85 (13.6) | 63 (10.6) | |
| Body mass index (kg/m2) (n, %) | |||
| <25 | 295 (46.9) | 293 (47.1) | 0.53 |
| 25–<30 | 266 (42.3) | 250 (40.2) | |
| ≥30 | 68 (10.8) | 79 (12.7) | |
| Smoking (n, %) | |||
| Never | 388 (62.3) | 383 (61.9) | 0.88 |
| Former or current | 235 (37.7) | 236 (38.1) | |
| Alcohol consumption (n, %) | |||
| Never | 84 (13.5) | 97 (15.9) | 0.24 |
| Former or current | 537 (86.5) | 514 (84.1) | |
| PSA screening history (n, %) b | |||
| No | 300 (47.9) | 536 (86.2) | <0.001 |
| Yes | 326 (52.1) | 86 (13.8) | |
| Family history of prostate cancer(n, %) | |||
| No | 346 (55.0) | 478 (76.8) | <0.001 |
| Yes | 148 (23.5) | 63 (10.1) | |
| Not known | 135 (21.5) | 81 (13.1) | |
| GSTM1 copy number (n, %) | |||
| 0 | 159 (25.3) | 197 (31.7) | 0.02 |
| 1 | 317 (50.4) | 284 (45.7) | |
| 2 | 142 (22.5) | 137 (22.0) | |
| 3 | 8 (1.3) | 4 (0.6) | |
| 4 | 3 (0.5) | 0 (0) | |
| GSTT1 copy number (n, %) | |||
| 0 | 153 (24.3) | 192 (30.9) | <0.001 |
| 1 | 280 (44.5) | 284 (45.7) | |
| 2 | 173 (27.5) | 141 (22.7) | |
| 3 | 15 (2.4) | 3 (0.5) | |
| 4 | 8 (1.3) | 2 (0.3) |
a
P values for continuous variables are those for non-parametric Mann-Whitney rank tests; for categorical variables, P values were calculated in tests for heterogeneity across levels.