Table 1.
Descriptive Characteristics of Case-Control Sample
| Trait | Control Subjects | Case Subjects | Comparison |
| Mean age in years (SD) | 60.7 (10.0)a | 61.3 (6.8)b | χ2=3.46; df 1; P=.063c |
| Race: | |||
| White | 215 (85.3%) | 306 (86.4%) | FET P=.611 |
| Black | 33 (11.4%) | 37 (10.5%) | |
| Other | 7 (3.3%) | 11 (3.1%) | |
| Mean serum PSA in ng/ml (SD)d | .80 (1.00) | 8.33 (7.18) | χ2=400.06; df 1; P<.0001c |
| Family history of CaP: | |||
| No | 236 (91.5%) | 275 (79.7%) | FET P<.0001 |
| Yes | 22 (8.5%) | 70 (20.3%) |
a
Range 41–84 years.
b
Range 41–80 years.
c
Kruskal-Wallis χ2 approximation.
d
Serum PSA was measured at time of diagnosis, in case subjects, and at most recent clinic visit, in control subjects.