Table 3.
Multivariate analysis for OS in LRRT group.
| Characteristic | HR | 95%CI | P value |
|---|---|---|---|
| Gender | 0.60 | 0.35–0.95 | 0.032 |
| Age (yr) | 1.03 | 0.73–1.44 | 0.885 |
| T stage | 0.97 | 0.63–1.51 | 0.897 |
| N stage | 1.54 | 1.00–2.37 | 0.048 |
| Metastatic sites | 2.79 | 1.84–4.22 | <0.001 |
| Number of PCT cycles | 1.14 | 0.78–1.65 | 0.501 |
| Tumor response to PCT | 2.38 | 1.68–3.37 | <0.001 |
| CCT | 1.31 | 0.92-1.86 | 0.141 |
CI, confidence interval; HR, hazard ratio; PCT, palliative chemotherapy; LRRT, locoregional radiotherapy; CCT, concurrent chemotherapy.
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); CCT (Yes vs. No).