Table 4 The univariate and multivariate survival analysis of all patients

Age

0.753

 <65 years vs. ≥65 years

Gender

0.880

 Male vs. female

Cross-sectional location

0.315

 Lesser vs. greater vs. anterior vs. posterior vs. circumferential involvement

Longitudinal location

0.030

 U vs. M vs. L

Differentiation grade

0.378

 Well-moderate vs. poor-undifferentiated

Macroscopic type

0.027

 Type 1–2 vs. Type 3–4

Tumor size

0.002

 <5 cm vs. ≥5 cm

Resection patterns

 DG vs. TG

0.012

Bursectomy

0.055

0.025

 With vs. without

1:1.640 (1.064–2.528)

T stage

<0.001

1

 pT2-3 vs. pT4

1:2.719 (1.615–4.579)

<0.001

N stage

<0.001

 N0

1

 N1

1.674 (0.812–3.450)

0.163

 N2

1.936 (0.934–4.010)

0.075

 N3

2.702 (1.461–4.997)

0.002