Table 3. Multivariate Cox regression analysis of models in discovery cohort.
| Variable | RPSS | Clinicopathologic-based model | |||||
| Coefficient | HR (95% CI) | P | Coefficient | HR (95% CI) | P | ||
| PS, performance status; RPSS, radiomics prognostic scoring system; HR, hazard ratio; 95% CI, 95% confidence interval. The score value of RPSS was calculated as follow: Score = 0.474 × performance status + 0.213 × N stage + 1.296 × radiomcis signature. | |||||||
| PS | 0.474 | 1.606 (1.058, 2.438) | 0.026 | 0.632 | 1.881 (1.260, 2.810) | 0.002 | |
| N stage | 0.214 | 1.239 (1.033, 1.485) | 0.021 | 0.337 | 1.401 (1.169, 1.679) | <0.001 | |
| Radiomics signature | 1.296 | 3.655 (2.767, 4.827) | <0.001 | − | − | − | |