Table 3 Survival analysis according to multivariable Cox proportional hazard models

Factors associated with local recurrence-free survival

Size ≥ 5 cm

2.84

2.07 to 3.96

<0.001

Grade

2.2

1.1 to 4.5

0.024

Margin

3.88

1.52 to 9.90

<0.001

Factors associated with metastasis-free survival

Grade

2.10

1.33 to 3.30

0.003

Margin

3.69

1.85 to 7.44

<0.001

Factors associated with overall survival

Age

1.02

1.01 to 1.03

0.01

Margin

2.4

1.2 to 4.5

0.008