Table 2

Variables	OR	IC 95%		p
Current age	1,65	0,78	3,49	0,19
Age at acne onset	1,64	0,89	3,00	0,11
Age at menarche	0,33	0,13	0,84	0,02
Body mass index	0,60	0,38	0,95	0,03
Regular use of cosmetics	0,20	0,03	1,17	0,08
Current smoking	6,36	0,36	111,65	0,21
Hormonal contraceptives	0,05	0,00	0,77	0,03
Constant	-	-	-	0,33

*Final model defined by a stepwise backward algorithm; dependent variable: acne persistence; p(model) < 0,01; correct classification = 81%

Table 2: Multivariate analysis of studied features of patients by logistic regression.*