Table 2: Unadjusted associations between patient characteristics and PSA failure.
| Variable | Hazards ratio | 95% CI | p |
| Age | 1.00 | (0.96, 1.04) | 0.958 |
| Blood group | |||
| O | Reference | ||
| A | 0.96 | (0.58, 1.61) | 0.894 |
| B | 0.63 | (0.30, 1.33) | 0.225 |
| Gleason score | |||
| < = 6 | Reference | ||
| 7 | 2.00 | (1.09, 3.60) | 0.025 |
| > = 8 | 2.40 | (1.16, 4.97) | 0.019 |
| Pre-op PSA | 1.03 | (1.00, 1.07) | 0.045 |
| Pathological State | |||
| 1 | Reference | ||
| 2 | 1.18 | (0.61, 2.31) | 0.620 |
| 3 | 1.90 | (0.96, 3.81) | 0.066 |
| Seminal vesicle involvement | |||
| No | Reference | ||
| Yes | 0.62 | (0.25, 1.55) | 0.307 |
| Surgical margin or Extraprostatic extension | |||
| None | Reference | ||
| Either | 2.55 | (1.51, 4.31) | < 0.001 |