|
Boys (N = 937)
|
Girls (N = 891)
|
Whole sample (N = 1818)
|
---|
|
Unadjusted
|
Adjusted
|
Unadjusted
|
Adjusted
|
Unadjusted
|
Adjusted
|
---|
|
ORa
|
95%CIb
|
OR
|
95%CI
|
OR
|
95%CI
|
OR
|
95%CI
|
OR
|
95%CI
|
OR
|
95%CI
|
---|
Level of Education
| | | | | | | | | | | | |
Primary
|
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
Middle
|
1.1
|
0.6-1.8
|
1.0
|
0.6-1.8
|
0.7
|
0.5-1.1
|
0.9
|
0.6-1.3
|
0.9
|
0.6-1.3
|
1.0
|
0.7-1.5
|
High
|
0.4
|
0.2-0.6***
|
0.4
|
0.3-0.6 ***
|
0.4
|
0.2-0.6***
|
0.5
|
0.3-0.8**
|
0.4
|
0.3-0.5***
|
0.5
|
0.3-0.7***
|
Technical
|
0.4
|
0.3-0.7 ***
|
0.5
|
0.3-0.8 **
|
0.3
|
0.1-0.5 ***
|
0.4
|
0.2-0.8**
|
0.5
|
0.3-0.7 **
|
0.6
|
0.4-0.9 *
|
Sports clubs
| | | | | | | | | | | | |
< 2 times
|
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
≥ 2 times
|
3.9
|
3.1-4.9 ***
|
3.4
|
2.7-4.2 ***
|
3.6
|
2.5-5.1 ***
|
3.0
|
2.2-4.2 ***
|
3.9
|
3.1-5.0 ***
|
3.4
|
2.7-4.4 ***
|
Television
| | | | | | | | | | | | |
> 2 hours
|
Ref.
| |
-
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
≤ 2 hours
|
0.9
|
0.7-1.2
| | |
1.6
|
1.2-2.1 **
|
1.5
|
1.1-2.1 **
|
1.2
|
1.0-1.5
|
1.2
|
0.9-1.5
|
Video/DVDs
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤ 1 hours
|
1.0
|
0.8-1.3
| | |
1.0
|
0.7-1.5
| | |
1.0
|
0.8-1.2
| | |
Electronic games
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
Ref.
| |
≤ 1 hours
|
1.0
|
0.8-1.2
| | |
0.9
|
0.6-1.2
| | |
0.8
|
0.6-0.9 *
|
0.9
|
0.7-1.1
|
Computer
| | | | | | | | | | | | |
> 2 hours
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤ 2 hours
|
0.9
|
0.6-1.2
| | |
1.2
|
0.9-1.7
| | |
1.0
|
0.8-1.3
| | |
Homework
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤ 1 hours
|
0.7
|
0.5-1.1
| | |
0.9
|
0.6-1.3
| | |
0.9
|
0.7-1.2
| | |
Talking on the phone
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
-
| |
Ref.
| |
Ref.
| |
Ref.
| |
Ref.
| |
≤ 1 hours
|
1.2
|
0.8-1.7
| | |
1.4
|
1.0-2.0 *
|
1.1
|
0.8-1.6
|
1.4
|
1.0-1.8 *
|
1.1
|
0.8-1.5
|
Listening to Music
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
Ref.
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤ 1 hours
|
0.8
|
0.6-1.0
|
0.6
|
0.5-0.8 **
|
1.0
|
0.7-1.3
| | |
0.9
|
0.7-1.1
| | |
Traveling by car/bus
| | | | | | | | | | | | |
> 1 hour
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤ 1 hours
|
1.3
|
0.8-1.9
| | |
1.2
|
0.8-1.7
| | |
1.1
|
0.8-1.4
| | |
Sum of screen based
| | | | | | | | | | | | |
> 7 hours
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤7 hours
|
1.0
|
0.8-1.2
| | |
1.2
|
0.8-1.8
| | |
1.0
|
0.8-1.3
| | |
Sum of non screen based
| | | | | | | | | | | | |
> 5 hours
|
Ref.
| |
-
| |
Ref.
| |
-
| |
Ref.
| |
-
| |
≤5 hours
|
0.9
|
0.6-1.2
| | |
1.2
|
0.9-1.7
| | |
1.1
|
0.8-1.4
| | |
- aOR = Odds Ratio, bCI = Confidence Interval; Note: Entry level to the logistic regression model was set at p < 0.10; * association at p < 0.05; ** association at p < 0.01; *** association at p < 0.001.