Table 3: Multivariate Cox proportional hazard models of PSA failure.
| Hazard ratio | 95% CI | p | |
| Age | 1.00 | (0.94, 1.02) | 0.323 |
| Blood group | |||
| O | Reference | ||
| A | 0.59 | (0.33, 1.05) | 0.072 |
| B | 1.25 | (0.66, 2.35) | 0.495 |
| AB | 1.22 | (0.46, 3.20) | 0.692 |
| Gleason score | |||
| < = 6 | Reference | ||
| 7 | 1.49 | (0.80, 2.76) | 0.209 |
| > = 8 | 2.213 | (1.00, 4.88) | 0.049 |
| Pre-op PSA | 1.03 | (1.00, 1.06) | 0.099 |
| Pathological stage | |||
| T1 | Reference | ||
| T2 | 1.18 | (0.60, 2.32) | 0.629 |
| T3 | 1.01 | (0.45, 2.27) | 0.980 |
|
Surgical margin or Extraprostatic extension None Either |
Reference 2.29 |
(1.22, 4.32) |
0.010 |
| Cox proportional hazard model of PSA failure. c-statistic = 0.67. | |||