Table 1. Prevalence (%) and Odds Ratio of internet dependence according to demographic, social and family variables and body mass index in high school adolescents, Rio Branco, Acre, Brazil.

	n*	%	OR	p-value
Sex
Male	650	6.9	1
Female	737	13.9	2.18	<0.001
Age
14-15 years	616	11.2	1
16-18 years	771	10.2	0.90	0.567
Only child
No	1,199	10.5	1
Yes	169	11.2	1.07	0.772
True friends
6 or more friends	411	8.5	1
1 to 5 friends	781	11.9	1.45	0.073
No Friends	77	12.9	1.60	0.217
Another teenager at home
Yes	844	10.0	1
No	515	11.4	1.15	0.421
BMI
Eutrophic	1,046	10.5	1
Overweight	304	11.5	1.10	0.621

*The total n does not add up to 1,387 for all variables because some questions did not have answers.

OR: Odds Ratio; BMI: body mass index.