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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Ann Surg Oncol. 2010 Apr 9;17(8):2006–2014. doi: 10.1245/s10434-010-1050-z

Table 2.

Comparisons of patient characteristics in the model development and validation datasets for localized melanoma

Variable Model Development (Training) Dataset (n=14,760) % Model Validation (Testing) Dataset (n=10,974) %
Age
<50 44.9 45.0
50–59 20.7 20.4
60–69 19.1 18.0
70–79 11.8 12.6
≥80 3.6 4.0
Gender
Male 54.2 52.9
Female 45.8 47.1
Lesion Site
Axial (trunk, head, neck) 60.8 48.3
Extremity 39.2 51.7
Tumor Thickness (mm)
0–0.50 22.3 18.1
0.51–1.00 23.3 28.1
1.01–2.00 29.6 26.4
2.01–3.00 11.9 12.5
3.01–6.00 9.9 11.7
>6.00 3.2 3.1
Ulceration
No 80.8 80.3
Yes 19.2 19.7
Level of Invasion
II 22.0 20.7
III 28.8 33.6
IV 44.8 40.7
V 4.3 5.0
Stage
IA 36.0 37.4
IB 33.4 30.1
IIA 15.7 16.3
IIB 10.3 11.1
IIC 4.6 5.1
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