Table 3 Univariate and multivariate Cox regression analyses of overall survival in patients after matching

Sex

0.86

0.61–1.20

0.369

Age †

1.02–1.91

0.040

1.01

1.00–1.02

0.018*

Tumor location

0.83

0.66–1.05

0.126

Histologic grade

1.10

0.90–1.34

0.364

Surgical approach

1.04

0.85–1.29

0.686

Tumor length

1.39

1.05–1.83

0.021

0.96

0.72–1.29

0.791

pT stage

1.90

1.52–2.39

 < 0.001

1.64

1.29–2.09

 < 0.001

pN stage

1.77

1.54–2.04

 < 0.001

1.67

1.44–1.94

 < 0.001

Postoperative treatment

0.98

0.88–1.10

0.753

4R dissection status

1.06

0.80–1.39

0.696