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Table 2 Univariate and multivariate analyses of overall survival according to the surgeon class (N = 3928)
| Overall survival (%) | Univariate analysis Log-Rank p-value | Cox Multivariate analysis | ||
|---|---|---|---|---|
| Hazard ratio (95% CI*) | p-value | |||
| Surgeon class | ||||
| High-volume | 87.2 | < 0.001 | 0.81 (0.67-0.98) | 0.027 |
| Others | 81.6 | 1 | ||
| Age at diagnosis | ||||
| < 50 years old | 90.0 | < 0.001 | 0.87 (0.68-1.11) | 0.267 |
| 50 to 74 years old | 89.6 | 1 | ||
| > 74 years old | 61.2 | 3.31 (2.71-4.04) | < 0.001 | |
| T stage | ||||
| T1 | 90.4 | < 0.001 | 1 | |
| T2 | 76.6 | 1.67 (1.35-2.05) | < 0.001 | |
| T3 or 4 | 51.9 | 2.70 (2.00-3.63) | < 0.001 | |
| Node status | ||||
| N0 | 90.4 | < 0.001 | 1 | < 0.001 |
| N+ | 76.2 | 1.92 (1.58-2.32) | ||
| Metastasis status | ||||
| M0 | 86.8 | < 0.001 | 1 | < 0.001 |
| M+ | 34.8 | 3.32 (2.37-4.64) | ||
| At least one comorbidity | ||||
| Yes | 87.5 | < 0.001 | 1.04 (0.85-1.26) | 0.720 |
| No | 79.7 | 1 | ||
| Circumstances of diagnosis | ||||
| Screening | 93.0 | < 0.001 | 0.54 (0.43-0.68) | < 0.001 |
| Clinical symptoms | 83.1 | 1 | ||
