Table 2 Ordered proportional odds logistic regression model

Sex (reference: Female)

 Male

1.61

1.22–2.11

< 0.001

Tumor site (reference: Upper limbs)

 Lower limbs

0.88

0.55–1.42

0.602

 Head

1.98

1.19–3.30

0.009

 Hands/feet

2.18

1.14–4.18

0.019

 Trunk

0.68

0.45–1.01

0.058

Histologic subtype (reference: Nodular melanoma)

 Superficial spreading

0.85

0.54–1.33

0.470

 Other

0.88

0.48–1.61

0.673

Growth type (reference: Radial)

 Vertical

1.11

0.78–1.57

0.555

Mitotic count per high power microscopic field

1.05

1.01–1.08

0.011

Tumor infiltrating lymphocytes (reference: Present)

 Absent

1.32

0.99–1.76

0.063

TNM Stage (reference: stage I)

 II

2.77

1.79–4.30

< 0.001

 III

1.13

0.70–1.83

0.623

 IV

1.40

0.55–3.58

0.482