Table 2.
Univariable and multivariable Cox proportional hazards regression for overall survival
| Characteristic | Univariable analysis | Multivariable analysis | ||
|---|---|---|---|---|
| HR (95% CI) | P Value | HR (95% CI) | P Value | |
| Sex (female vs male) | 1.27 (0.65–2.48) | 0.488 | ||
| Age (< 59 vs ≧59) | 1.20 (0.69–2.07) | 0.522 | ||
| BMI (< 23.6 vs ≧23.6) | 1.07 (0.61–1.88) | 0.806 | ||
| ASA level (I + II vs III + IV) | 1.70 (0.93–3.11) | 0.083 | ||
| Mayo level (0-II vs III-IV) | 1.48 (0.80–2.74) | 0.217 | 1.15 (0.59–2.23) | 0.678 |
| Side (left vs right) | 1.17 (0.66–2.07) | 0.593 | ||
| Size (< 8.7 vs ≧8.7) | 1.07 (0.61–1.87) | 0.816 | 1.69 (0.92–3.11) | 0.088 |
| pN stage (N0 vs N1) | 2.33 (1.22–4.48) | 0.011 | 2.30 (1.17–4.55) | 0.016 |
| Metastasis at surgery (M0 vs M1) | 1.85 (1.05–3.29) | 0.035 | 1.92 (1.05–3.50) | 0.034 |
| Pathology (ccRCC vs non-ccRCC) | 1.88 (0.80–3.53) | 0.051 | ||
| Nuclear grade (I + II vs III + IV) | 2.22 (1.18–4.18) | 0.013 | 1.92 (0.97–3.84) | 0.063 |
| Tumor necrosis (yes vs no) | 2.35 (1.30–4.25) | 0.005 | 2.12 (1.11–4.04) | 0.023 |
| Sarcomatoid differentiation (yes vs no) | 4.40 (2.50–7.73) | < 0.001 | 3.94 (2.10–7.39) | < 0.001 |
| Sinus fat invasion (yes vs no) | 2.69 (0.65–11.08) | 0.172 | ||
| Renal capsule invasion (yes vs no) | 1.70 (0.98–2.94) | 0.058 | ||
| TT length (< 4.8 vs ≧4.8) | 1.30 (0.70–2.40) | 0.4 | ||
| TT width(< 2.5 vs ≧2.5) | 0.85(0.45–1.63) | 0.627 | ||
| IVC segmental resection (yes vs no) | 1.47 (0.77–2.81) | 0.244 | ||
BMI body mass index, ASA American Society of Anesthesiologists, IVC inferior vena cava, TT tumor thrombus