Table IV.

Results from multivariate logistic model for thick and ulcerated melanomas.

A, Results from multivariate logistic model for thick melanoma
Variable	Category	Odds ratio	95% confidence interval	P-value
Holidays with sun exposure	Yes vs. no	0.79	0.65–0.95	0.014
Gender	Men vs. women	1.26	1.06–1.50	0.010
Age, years	≥55 vs. <55	1.58	1.31–1.90	<0.0001
Educational level	High vs. low	0.74	0.61–0.89	0.002
Professional level	High vs. low	0.83	0.69–1.00	0.048
Body mass index	≥25 vs. <25	1.34	1.12–1.59	0.001
Area of residence in Italy	North vs. south	0.52	0.43–0.62	0.005
	Center vs. south	0.45	0.33–0.62	0.002
Season of diagnosis	Winter vs. autumn	1.31	1.07–1.61	0.054
	Summer vs. autumn	1.25	0.99–1.56	0.388
Specialty of diagnosing doctor	Oncologist vs. other	0.91	0.71–1.17	0.360
	Dermatologist vs. other	0.70	0.53–0.93	0.005
Sunbed use	Yes vs. no	0.83	0.64–1.06	0.132
Exposure during peak sunlight hours	Yes vs. no	1.00	0.83–1.21	0.979
B, Results from multivariate logistic model for ulcerated melanoma
Variable	Category	Odds ratio	95% confidence interval	P-value
Holidays with sun exposure	Yes vs. no	0.76	0.61–0.93	0.009
Gender	Men vs. women	1.41	1.17–1.71	0.0004
Age, years	≥55 vs. <55	1.47	1.19–1.81	0.0003
Educational level	High vs. low	0.70	0.57–0.85	0.0004
Area of residence in Italy	North vs. south	0.57	0.47–0.70	0.157
	Center vs. south	0.45	0.31–0.66	0.004
Specialty of diagnosing doctor	Oncologist vs. other	0.78	0.59–1.02	0.413
	Dermatologist vs. other	0.72	0.52–0.98	0.093
Sunbed use	Yes vs. no	0.77	0.56–1.06	0.108
Exposure during peak sunlight hours	Yes vs. no	0.97	0.78–1.19	0.739