Table 1 Socio-demographic characteristics of study participants by gender
Boys | Girls | All | |||||
|---|---|---|---|---|---|---|---|
N | % | N | % | N | % | ||
Age | 11 y | 10600 | 37.4 | 10128 | 34.1 | 20728 | 35.7 |
13 y | 10244 | 34.0 | 10417 | 35.2 | 20661 | 34.6 | |
15 y | 8459 | 28.6 | 9080 | 30.7 | 17539 | 29.7 | |
Total | 29303 | 100 | 29625 | 100 | 58928 | 100 | |
Geographicarea of residence | North | 11823 | 34.2 | 11954 | 33.4 | 23777 | 33.8 |
Centre | 6451 | 17.4 | 6110 | 15.8 | 12561 | 16.6 | |
South | 11029 | 48.4 | 11561 | 50.8 | 22590 | 49.6 | |
Total | 29303 | 100 | 29625 | 100 | 58928 | 100 | |
Parental education attainment° | Less than high school | 7169 | 33.1 | 8264 | 38.0 | 15433 | 35.6 |
High school diploma | 8906 | 36.4 | 9038 | 36.5 | 17944 | 36.4 | |
University degree | 7305 | 30.5 | 6472 | 25.5 | 13777 | 28.0 | |
Total | 23380 | 100 | 23774 | 100 | 47154 | 100 | |
Missing | 5923 | 20.6 | 5851 | 19.0 | 11774 | 19.8 | |
Daily | 15487 | 51.4 | 13707 | 44.1 | 29194 | 47.8 | |
Breakfast | Less than daily | 13603 | 48.6 | 15717 | 55.9 | 29320 | 52.2 |
Total | 29090 | 100.0 | 29424 | 100.0 | 58514 | 100.0 | |
Missing | 213 | 0.7 | 201 | 0.6 | 414 | 0.6 | |
Underweight | 403 | 1.7 | 796 | 3.0 | 1199 | 2.4 | |
Normal-weight | 17715 | 72.1 | 20200 | 81.4 | 37915 | 76.7 | |
BMI | Overweight | 4337 | 21.5 | 2857 | 13.6 | 7194 | 17.5 |
Obese | 849 | 4.8 | 426 | 2.0 | 1275 | 3.4 | |
Total | 23304 | 100.0 | 24279 | 100.0 | 47583 | 100.0 | |
Missing | 5999 | 20.9 | 5346 | 19.2 | 11345 | 20.0 | |