Table 2.
Univariate and multivariate Cox regression analyses of factors predictive of progression-free survival in type 2 PRCC patients.
| Variable | Univariate analysis | Multivariate analysis | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | p | HR | 95% CI | p | |
| Gender (male vs. female) | 1.111 | 0.472–2.616 | 0.809 | – | – | – |
| Age (>55 vs. ≤55) | 1.582 | 0.728–3.437 | 0.246 | – | – | – |
| Tumor location (left vs. right) | 1.505 | 0.712–3.182 | 0.285 | – | – | – |
| Tumor size (>5.8 cm vs. ≤5.8 cm) | 2.617 | 1.205–5.683 | 0.015 | 1.032 | 0.450–2.364 | 0.941 |
| Surgical procedures (RN vs. PN) | 4.877 | 1.472–16.160 | 0.010 | 2.562 | 0.713–9.210 | 0.149 |
| T stage (III/IV vs. I/II) | 6.692 | 3.177–14.097 | <0.001 | 3.879 | 1.559–9.649 | 0.004 |
| WHO/ISUP grade (G3/4 vs. G1/2) | 8.546 | 2.570–28.416 | <0.001 | 5.275 | 1.500–18.551 | 0.010 |
| Microvascular invasion (yes vs. no) | 4.138 | 1.820–9.408 | 0.001 | 1.356 | 0.496–3.709 | 0.553 |
| Tumor necrosis (yes vs. no) | 1.095 | 0.495–2.421 | 0.823 | – | – | – |
| Sarcomatoid differentiation (yes vs. no) | 2.186 | 0.296–16.171 | 0.444 | – | – | – |
PRCC, papillary renal cell carcinoma; RN, radical nephrectomy; PN, partial nephrectomy; WHO/ISUP, WHO International Society of Urological Pathology.