Table 3 Multivariable proportional hazards regressions of survivals between CCRT and CCRT + AC subgroups after propensity score matching

Age (year)

 ≤54

reference

reference

reference

 >54

0.75

0.19–2.87

0.672

1.35

0.36-502.33

0.159

1.86

0.26–13.38

0.540

ECOG

 0

reference

reference

reference

 1

1.79

0.45–7.13

0.409

1.08

0.01–2.04

0.138

1.85

0.15–23.21

0.632

Grade

 III

reference

reference

reference

 II

1.61

0.35–7.53

0.542

1.96

0.26–15.10

0.517

 unknown

1.50

0.37–6.04

0.571

0.33

0.02–6.68

0.469

1.21

0.15–9.83

0.861

Hgb (g/L)

 ≤117

reference

reference

reference

 >117

0.73

0.19–2.74

0.637

0.15

0.01–2.74

0.200

2.10

0.29–15.12

0.462

HPV

 negative

reference

reference

reference

 positive

0.22

0.05–1.09

0.063

 unknown

0.51

0.06–4.06

0.521

Tumor-diameter

 ≤4

reference

reference

reference

 >4

2.40

0.63–9.08

0.197

0.99

0.06–16.65

0.993

0.28

0.05–1.69

0.165

CCT cycles

 ≤3

reference

reference

reference

 >3

0.67

0.18–2.62

0.573

1.12

0.16–8.57

0.915

Group

 CCRT

reference

reference

reference

 CCRT + AC

0.89

0.29–2.70

0.833

3.26

0.30-35.38

0.331

4.80

0.55–42.26

0.157