Table 3.

Univariate and multivariate Cox-regression analyses for OS

VariableUnivariate analysisMultivariate analysis
HR (95% CI)PHR (95% CI)P
Age1.09 (0.76-1.57)0.6501.02 (0.64-1.61)0.950
Sex1.05 (0.64-1.75)0.8400.86 (0.44-1.70)0.660
Smoking status1.04 (0.69-1.58)0.8501.42 (0.79-2.55)0.240
KPS0.74 (0.45-1.22)0.2400.76 (0.42-1.37)0.370
Weight loss0.93 (0.57-1.49)0.7500.84 (0.51-1.38)0.490
Histology1.04 (0.93-1.16)0.5301.04 (0.93-1.67)0.490
Tumor stage0.90 (0.58-1.39)0.6200.88 (0.55-1.40)0.600
Radiation technique0.44 (0.26-0.72)0.0010.47 (0.27-0.82)0.008
Radiation dose0.76 (0.51-1.15)0.1900.82 (0.53-1.27)0.380
Chemotherapy1.14 (0.74-1.77)0.5601.45 (0.82-1.56)0.200
COX-2 −1195G/A0.58 (0.39-0.86)0.0060.58 (0.39-0.87)0.008