Table 2. Prevalence (%) and Odds Ratio of internet dependence according to variables of leisure activities, parental control and time spent using computers in high school adolescents, Rio Branco, Acre, Brazil.

	n*	%	OR	p-value
Using a computer in their room
No	1,041	9.1	1
Yes	331	15.7	1.85	0.001
Parental control over computer use
Yes	522	9.9	1
No	852	11.0	1.12	0.532
Computer time during the week
Up to two hours a day	1,329	9.8	1
More than two hours a day	58	29.3	3.79	<0.001
Computer time during the weekend
Up to two hours a day	1,077	8.4	1
More than two hours a day	310	18.3	2.44	<0.001
Going to the movies or theater
Rarely or never	549	11.1	1
Monthly	619	8.5	0.74	0.144
Weekly	206	15.0	1.41	0.142
Going out to dance at nightclubs or shows
Rarely or never	974	8.2	1
Monthly	247	12.9	1.66	0.022
Weekly	138	22.4	3.23	<0.001
Reading newspapers, magazines or books
Rarely or never	419	12.6	1
Monthly	314	11.4	0.89	0.627
Weekly	641	8.7	0.66	0.041
Physical activity
> 300 minutes	591	7.9	1
150 to 299 minutes	188	8.5	1.07	0.807
1 to 149 minutes	197	10.6	1.38	0.243
Does not practice physical activity	323	17.0	2.37	<0.001

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

OR: Odds Ratio.