Table 4. Multivariate analysis (Cox proportional hazards regression of variables associated with the outcomes).
| Characteristic | Multivariable analysis | |
|---|---|---|
| Hazard ratio (95% CI) | p-value | |
| Outcomes of relapse-free (restart medical therapy, undergo repeat TUNA or went on to have TURP) | ||
| Age | 0.994 (0.955–1.035) | 0.786 |
| IPSS (pre-operation) | 1.033 (0.979–1.090) | 0.242 |
| Bother (pre-operation) | 0.952 (0.678–1.335) | 0.774 |
| Qmax (pre-operation) | 0.993 (0.909–1.086) | 0.884 |
| Residual urine (pre-operation) | 1.003 (0.996–1.009) | 0.417 |
| Prostate volume | 1.017 (0.985–1.051) | 0.306 |
| Maximum transverse diameter | 0.987 (0.924–1.053) | 0.685 |
| Successful trial off catheter after operation in 1st attempt | 1.343 (0.510–3.533) | 0.551 |
| Outcomes of requiring additional operations or procedure | ||
| Age | 0.914 (0.833–1.002) | 0.056 |
| IPSS (pre-operation) | 1.061 (0.934–1.205) | 0.366 |
| Bother (pre-operation) | 1.162 (0.581–2.323) | 0.671 |
| Qmax (pre-operation) | 0.986 (0.817–1.189) | 0.881 |
| Residual urine (pre-operation) | 1.002 (0.986–1.017) | 0.835 |
| Prostate volume | 1.038 (0.964–1.117) | 0.322 |
| Maximum transverse diameter | 0.943 (0.823–1.080) | 0.394 |
| Successful trial off catheter after operation in 1st attempt | 0.836 (0.162–4.307) | 0.830 |
CI, confidence interval; IPSS, International Prostate Symptom Score; Qmax, maximum urinary flow.