Table 2.
DPC population baseline characteristics
| Variables | African American | Caucasian | P-value |
|---|---|---|---|
| Number of patients, N (%) | 650 (14) | 3861 (86) | — |
| Age at surgery (years) | <0.001 | ||
| Median (IQR) | 61 (56–66) | 64 (58–69) | |
| Preoperative PSA (ng ml−1) | <0.001 | ||
| Median (IQR) | 7.3 (5.2–12.2) | 6.5 (4.6–10.3) | |
| Preoperative stage | 0855 | ||
| T1 | 363 (74) | 1935 (74) | |
| T2–T3 | 130 (26) | 679 (26) | |
| Biopsy Gleason score, N (%) | <0.001 | ||
| 2–6 | 366 (65) | 2408 (72) | |
| 7 | 127 (23) | 705 (21) | |
| 8–10 | 67 (12) | 250 (7) | |
| Positive biopsy scores (%) | 0.963 | ||
| Median (IQR) | 50 (33–100) | 50 (33–100) | |
| Positive surgical margins, N (%) | 246 (43) | 1234 (35) | <0.001 |
| Extracapsular extension, N (%) | 193 (31) | 1324 (35) | 0.032 |
| Seminal vesicle invasion, N (%) | 79 (12) | 476 (12) | 0.911 |
| Positive lymph nodes, N (%) | 6 (1) | 71 (2) | 0.103 |
| Pathology Gleason score, N (%) | <0.001 | ||
| 2–6 | 242 (37) | 1877 (49) | |
| 7 | 322 (50) | 1485 (38) | |
| 8–10 | 86 (13) | 499 (13) | |
| Prostate weight (g) | 0.973 | ||
| Median (IQR) | 38 (30–50) | 38 (30–50) | |
| Follow-up (months) | <0.001 | ||
| Median (IQR) | 48 (22–89) | 69 (29–117) |
Abbreviation: IQR, interquartile range.