TABLE 1—
Baseline Characteristics, by Race Among Men Diagnosed with Prostate Cancer, Chicago Area, 1986–1990
| All | Blacks | Whites | P | |
| Sample size | 864 | 327 | 537 | |
| Mean age, y (SD) | 69.0 (7.2) | 69.3 (7.8) | 68.8 (7.8) | .307 |
| Mean time from diagnosis to death, y | 5.5 | 4.9 | 5.9 | < .001 |
| Deaths, no. (%) | 507 (58.7) | 222 (67.9) | 285 (53.1) | < .001 |
| Differentiation, no. (%) | ||||
| Well | 235 (27.2) | 80 (24.5) | 155 (28.9) | |
| Moderate | 274 (31.7) | 103 (31.5) | 171 (31.8) | |
| Poor | 355 (41.1) | 144 (44.0) | 211 (39.3) | .276a |
| Stage, no. (%) | ||||
| Localized | 437 (50.6) | 132 (40.3) | 305 (56.8) | |
| Regional | 157 (18.2) | 60 (18.4) | 97 (18.1) | |
| Distant unstagedb | 270 (31.2) | 132 (41.3) | 133 (25.1) | < .001a |
aChi-square P value.
bPresumed to be distant stage by the treating physician but not staged (n = 5).