Table 5.
Cox’s proportional hazards regression model analysis for survival profiles of matched populations.
| Predictors of survival | DFS | OS | ||||
|---|---|---|---|---|---|---|
| p Value | HR | 95% CI | p Value | HR | 95% CI | |
| Surgical type (RATS vs others) | 0.478 | 1.190 | 0.736, 1.923 | 0.480 | 1.162 | 0.766, 1.764 |
| Gender (male vs female) | 0.462 | 0.836 | 0.518, 1.348 | 0.885 | 0.971 | 0.648, 1.453 |
| Smoking history (yes vs no) | 0.821 | 1.051 | 0.684, 1.613 | 0.631 | 1.093 | 0.759, 1.535 |
| Histologic type (ADC vs SCC) | 0.442 | 1.192 | 0.762, 1.864 | 0.675 | 1.086 | 0.738, 1.600 |
| Tumor size (≤3 vs >3 cm) | 0.888 | 0.995 | 0.928, 1.067 | 0.626 | 0.976 | 0.885, 1.077 |
| LNs metastasis (yes vs no) | <0.001 | 3.785 | 2.727, 5.253 | <0.001 | 1.857 | 1.348, 2.559 |
DFS, disease-free survival; OS, overall survival; HR, hazard ratio; RATS, robotic-assisted thoracoscopic surgery; ADC, adenocarcinoma; SCC, squamous cell carcinoma.