Table 2 Survival analysis according to univariate Cox proportional hazard models

Age

< 45 vs. ≥ 45

0.05

1.27

0.91 to 1.78

0.157

1.02

1.02 to 1.03

0.01

Size

< 5 cm vs. ≥ 5 cm

<0.001

2.47

1.12 to 5.51

0.026

1.74

1.16 to 2.63

0.025

Depth

Superficial vs. Deep

0.363

1.46

0.82 to 2.6

0.198

1.32

0.92 to 1.88

0.130

Grade

Low vs. High

<0.001

3.45

1.63 to 7.373

<0.001

1.28

1.01 to 1.63

0.04

Margin

< 10 mm vs. ≥ 10 mm

<0.001

3.98

2.2 to 7.11

<0.001

4.6

2.6 to 8.4

<0.001