| 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   < 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   > 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 |  |  |