Table 1.
Baseline characteristics of study sample (n=2354)
| Age (years), mean (SD) | 65.0 (7.8) |
| Ethnicity, n (%) | |
| Caucasian | 1491 (63) |
| African American | 141 (6) |
| Asian | 171 (7) |
| Other | 116 (5) |
| Unknown | 435 (18) |
| Abnormal DRE, n (%) | |
| Yes | 231 (10) |
| No | 1655 (70) |
| Unknown | 468 (20) |
| Family history of prostate cancer*, n (%) | |
| Yes | 332 (21) |
| No | 1220 (79) |
| Previous negative biopsy, n (%) | |
| Yes | 905 (38) |
| No | 1449 (62) |
| PSA (ng/mL), median (IQR) | 6.5 (4.7, 9.5) |
| Prostate volume (cc), median (IQR) | 48 (35, 68) |
| PSA density, n (%) | |
| <0.15 | 1344 (57) |
| ≥0.15 | 1010 (43) |
| MRI score | |
| Negative (≤2) | 452 (19) |
| 3 | 677 (29) |
| 4 | 730 (31) |
| 5 | 495 (21) |
*
n=1552, UCLA data only.
DRE: digital rectal exam; IQR: interquartile range; MRI: magnetic resonance imaging; PSA: prostate-specific antigen; SD: standard deviation.