Table 2.
Univariate and multivariate Cox regression analyses of PFS and OS.
| Parameters | PFS | OS | ||||||
|---|---|---|---|---|---|---|---|---|
| Univariate analysis | Multivariate analysis | Univariate analysis | Multivariate analysis | |||||
| Hazard ratio (95% CI) | P value | Hazard ratio (95% CI) | P value | Hazard ratio (95% CI) | P value | Hazard ratio (95% CI) | P value | |
| Type of treatment | 0.347 | 0.319 | ||||||
| CCRT | 1 (reference) | 1 (reference) | ||||||
| RT | 1.61 (0.85–1.58) | 1.45 (0.70–3.03) | ||||||
|
| ||||||||
| Clinical TNM classification | 0.167 | 0.361 | ||||||
| II | 1 (reference) | 1 (reference) | ||||||
| III | 0.80 (0.58–1.10) | 0.71 (0.34–1.49) | ||||||
|
| ||||||||
| N stage | 0.167 | 0.361 | ||||||
| N0 | 1 (reference) | 1 (reference) | ||||||
| N1-2 | 1.56 (0.83–2.93) | 1.41 (0.67–2.98) | ||||||
|
| ||||||||
| Local recurrence | 0.005 | 0.006 | ||||||
| No | 1 (reference) | 1 (reference) | ||||||
| Yes | 2.57 (1.33–4.94) | 2.83 (1.35–5.91) | ||||||
|
| ||||||||
| Distant metastasis | 0.077 | 0.537 | ||||||
| No | 1 (reference) | 1 (reference) | ||||||
| Yes | 1.81 (0.94–3.48) | 1.27 (0.60–2.69) | ||||||
|
| ||||||||
| Duration of treatment | 0.058 | 0.031 | ||||||
| ≤6 weeks | 1 (reference) | 1 (reference) | ||||||
| >6 weeks | 0.54 (0.28–1.02) | 0.42 (0.19–0.92) | ||||||
|
| ||||||||
| Diseases related death | 0.001 | 0.001 | 0.001 | 0.000 | ||||
| No | 1 (reference) | 1 reference | 1 (reference) | 1 (reference) | ||||
| Yes | 2.89 (1.51–5.55) | 2.89 (1.51–5.55) | 3.82 (1.77–8.24) | 4.96 (2.19–11.26) | ||||
|
| ||||||||
| Dose of irradiation | 0.094 | 0.017 | 0.071 | 0.005 | ||||
| ≤54 Gy | 1 (reference) | 1 (reference) | 1 (reference) | 1 (reference) | ||||
| >54 Gy | 0.47 (0.19–1.14) | 0.33 (0.13–0.82) | 0.40 (0.15–1.08) | 0.21 (0.07–0.62) | ||||