Table 5. Results with the proportional odds model (Coefficient ± Standard Error, P-value). The first column indicates the specific model in terms of Dependent Variable/Explanatory Variable. Such models have been chosen according to the Deviance Criteria.

Model	Coefficient ± Standard Error, P-value of explanatory variables
	Age*	Pigmented lesions**
Epi.Int | Age	−0.05±0.02, P=0.007
Epi.Perc | Age	−0.04±0.02, P=0.014
Der.Int | Pigmented lesions		−1.82±0.73, P=0.015
Der.Perc | Pigmented lesions		−1.89±0.70, P=0.008

^*Negative coefficients indicate increase with respect to age;

^**negative coefficients indicate increase in malignant vs. benign lesions.Epi.Int, epidermal melanocytes intensity of c-Kit stain;

Epi.Per., epidermal melanocytes percentage of c-Kit stain; Der.Int., dermal melanocytes intensity of c-Kit stain; Der.Perc., dermal melanocytes percentage of c-Kit stain.