Table 1.
Clinical characteristics of the study population
| All Cases (n = 60) |
African-American (n = 30) |
European-American (n = 30) |
P value2 t-test |
|
|---|---|---|---|---|
| Age at prostatectomy median (range) n = 60 | 60 (47 – 73) | 61 (48 – 72) | 60 (47 – 73) | 0.91 |
| PSA at diagnosis median (range) n = 441 | 6.1 (1.3 – 47.7) | 6.0 (1.3 – 47.7) | 6.1 (4.0 – 20.0) | 0.67 |
| Largest individual nodule (grams) median (range) n = 511 | 1.6 (0.2 – 2.9) | 1.5 (0.8 – 2.9) | 1.6 (0.2 – 2.8) | 0.78 |
| N (%) | N (%) | N (%) | Fisher’s exact test | |
| Source of tissue | ||||
| NCI CPCTR | 52 (87) | 27 (90) | 25 (83) | |
| University of Maryland | 8 (13) | 3 (10) | 5 (17) | 0.71 |
| Gleason sum score | ||||
| < 7 (5–6) | 15 (25) | 8 (27) | 7 (23) | |
| ≥ 7 (7–9) | 45 (75) | 22 (73) | 23 (77) | 1.0 |
| Extraprostatic extension1 | ||||
| No | 35 (67) | 19 (70) | 16 (64) | |
| Yes | 17 (33) | 8 (30) | 9 (36) | 0.77 |
| Surgical margin status1 | ||||
| Negative | 30 (59) | 17 (63) | 13 (54) | |
| Positive | 21 (41) | 10 (37) | 11 (46) | 0.58 |
| Seminal vesicle invasion1 | ||||
| No | 43 (83) | 20 (74) | 23 (92) | |
| Yes | 9 (17) | 7 (26) | 2 (8) | 0.14 |
1
Cases with unknown status are not included.
2
P value for difference between African-Americans and European-Americans