Table 4. Univariate and multivariate analysis of the prognostic factors for OS in the oligo-metastatic subgroup.
| Characteristics | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|
| HR (95% CI) | P value | HR (95% CI) | P value | ||
| Age | 0.994 (0.945–1.046) | 0.812 | 1.009 (0.935–1.090) | 0.811 | |
| Smoking | |||||
| Yes or ever vs. never | 0.740 (0.244–2.240) | 0.594 | 2.740 (0.149–50.372) | 0.497 | |
| ECOG PS score | |||||
| 2–3 vs. 0–1 | 0.711 (0.273–1.847) | 0.483 | 0.594 (0.122–2.902) | 0.520 | |
| Response | |||||
| PR + CR vs. SD + PD | 0.540 (0.172–1.693) | 0.290 | 0.107 (0.010–1.133) | 0.063 | |
| Thoracic radiotherapy | |||||
| With vs. without | 0.296 (0.103–0.851) | 0.024* | 0.253 (0.074–0.868) | 0.029* | |
*, statistically significant P values. OS, overall survival; HR, hazard ratio; CI, confidence interval; ECOG, Eastern Cooperative Oncology Group; PS, performance status; PR, partial response; CR, complete response; SD, stable disease; PD, progressive disease.