Outcome variable | 2007 | 2012 | 2018 | Differencea | p-for trendb |
---|---|---|---|---|---|
 | % | % | % |  |  |
Body weight and dietary behaviour | |||||
 Overweight/obesity | 21.5 | 35.0 | 35.2 | +13.7 | <0.001 |
 Obesity | 3.0 | 8.9 | 9.7 | +6.7 | <0.001 |
 Fruits <2 times/day | 70.6 | 64.6 | 79.6 | +9.0 | <0.001 |
 Vegetable <3 times/day | 92.3 | 87.6 | 89.9 | -2.4 | 0.076 |
 Went hungry (mostly/always) | 4.3 | 4.6 | 2.3 | -2.0 | 0.013 |
Physical activity and sedentary behaviour | |||||
 Physical inactivity | 82.7 | 78.1 | 79.6 | -3.1 | 0.220 |
 Leisure-time sedentary behaviour | 44.7 | 46.9 | 52.8 | +8.1 | 0.003 |
 0 days walk or bike to school | 27.0 | 31.3 | 30.0 | +3.0 | 0.485 |
Substance use | |||||
 Parental tobacco use | 38.4 | 37.6 | 33.8 | -4.6 | 0.036 |
 Current cigarette use | 24.3 | 19.2 | 17.2 | -7.1 | <0.001 |
 Current other tobacco use | 8.3 | 8.8 | 8.2 | -0.1 | 0.965 |
 Passive smoking | 77.9 | 71.0 | 64.3 | -13.6 | <0.001 |
 Current alcohol use | 61.5 | 52.0 | 52.4 | -9.1 | 0.008 |
 Lifetime drunk | 38.7 | 32.8 | 35.7 | -3.0 | 0.299 |
 Trouble from alcohol use | 25.2 | 22.3 | 12.6 | -12.6 | <0.001 |
Injury and violence | |||||
 Any serious injury | 42.2 | 42.4 | 38.4 | -3.8 | 0.157 |
 Bullied | 26.6 | 24.3 | 29.7 | +3.1 | 0.094 |
 In physical fight | 43.8 | 44.7 | 33.3 | -10.5 | <0.001 |
 Physically attacked | 30.2 | 30.4 | 19.3 | -10.9 | <0.001 |
Poor mental health | |||||
 Having no close friends | 4.5 | 6.6 | 5.9 | +1.4 | 0.073 |
 Loneliness | 7.5 | 5.8 | 10.1 | +2.6 | 0.053 |
 Worry-induced sleep disturbance | 7.6 | 5.7 | 8.1 | +0.5 | 0.362 |
 Suicidal ideation | 14.0 | 11.7 | 13.8 | -0.2 | 0.773 |
 Suicide plan | 11.2 | 11.9 | 11.0 | -0.2 | 0.960 |
Sexual behaviour | |||||
 Ever sex | 44.4 | 48.2 | 48.2 | +3.8 | 0.298 |
 Multiple sexual partners | 34.8 | 25.9 | 28.4 | -6.4 | 0.036 |
 Non-condom use | 10.2 | 8.9 | 7.7 | -2.5 | 0.055 |
Protective factors | |||||
 School attendance | 60.0 | 65.9 | 68.3 | +8.3 | 0.002 |
 Peer support (mostly/always) | 50.1 | 47.1 | 46.8 | -3.3 | 0.316 |
 Parents/guardians supervision (mostly/always) | 37.7 | 32.4 | 30.4 | -7.3 | 0.005 |
 Parents/guardians connectedness (mostly/always) | 52.6 | 46.8 | 42.9 | -9.7 | <0.001 |
 Parents/guardians bonding (mostly/always) | 53.9 | 49.6 | 53.2 | -0.7 | 0.837 |