Table 3 Univariate Cox regression analysis for overall survival

Age (>65 y vs. ≤65 y)

1.667

0.007

1.147-2.424

Gender (female vs. male)

0.625

0.062

0.381-1.023

KPS (>80 vs. ≤80)

0.496

0.005

0.304-0.810

Weight loss (>5% vs. ≤5%)

1.820

0.004

1.205-2.749

LDH(>220 IU/L vs. ≤220 IU/L)

1.226

0.328

0.815-1.843

ISN (pre-treatment, yes vs. no)

1.408

0.166

0.867-2.287

Daily Fractions (once vs. twice)

1.112

0.575

0.768-1.609

TRT technique (3D vs. 2D)

0.821

0.357

0.539-1.249

CHT cycles (>5 vs. ≤5)

0.721

0.126

0.475-1.096

SER (>79 vs. ≤79 day)

1.097

0.623

0.758-1.587

ORT (>31 vs. ≤31 day)

1.356

0.106

0.937-1.964

BED (>57 vs. ≤57 Gy)

0.600

0.005

0.414-0.870

PCI (yes vs. no)

0.506

0.018

0.288-0.888