Table 1.

Socio-demographic characteristics of participants.

Items	Total (287)
	n (%)
Local
Rio de Janeiro	153 (53.3)
Manaus	134 (46.7)
Gender
Female	173 (60.3)
Male	114 (39.7)
Age groups (years)
18–21	34 (11.8)
21–30	115 (40.1)
31–40	66 (23.0)
41–50	41 (14.3)
>50	29 (10.1)
Not declared	2 (0.7)
Education
Illiterate	26 (9.1)
Primary school	42 (14.6)
Secondary school	162 (56.4)
College	56 (19.5)
Not declared	1 (0.4)
Family income
Low	157 (54.7)
Intermediate	57 (19.9)
High	42 (14.6)
Not declared	31 (10.8)