Table 2.
Multivariate analysis for OS.
| Characteristic | HR | 95%CI | P value |
|---|---|---|---|
| Gender | 0.86 | 0.62–1.20 | 0.382 |
| Age (year) | 1.18 | 0.92–1.51 | 0.192 |
| T stage | 0.97 | 0.70–1.34 | 0.857 |
| N stage | 1.68 | 1.22–2.31 | 0.001 |
| Metastatic sites | 2.84 | 2.14–3.77 | <0.001 |
| Number of PCT cycles | 0.79 | 0.61–1.02 | 0.075 |
| Tumor response to PCT | 1.75 | 1.35–2.26 | <0.001 |
| LRRT | 0.52 | 0.40–0.68 | <0.001 |
CI, confidence interval; HR, hazard ratio; PCT, palliative chemotherapy; LRRT, locoregional radiotherapy.
A Cox proportional hazards regression model was used to detect variables one by one without adjustment. All variables were transformed into categorical variables. HRs were calculated for Gender (Female vs. Male); Age (y) (>47 vs. ≤47); T stage (T3-4 vs. T1-2); N stage (N2-3 vs. N0-1); Metastatic sites (Multiple sites vs. Single site); Number of PCT cycle (>4 vs. ≤4); Tumor response to PCT (SD/PD vs. CR/PR); LRRT (Yes vs. No).