Table 1 Sample Characteristics in Total and Separately for Girls and Boys
|  | Total (n = 1770) | Girls 52.9% (n = 936) | Boys 47.1% (n = 834) | |||
|---|---|---|---|---|---|---|
n | % [95% CI] | n | % [95% CI] | n | % [95% CI] | |
Age group | ||||||
 11–13 years | 815 | 40.8 [37.9;43.9] | 410 | 41.0 [37.0;45.3] | 405 | 40.6 [36.4;45.0] |
 14–17 years | 955 | 59.2 [56.1;62.1] | 526 | 59.0 [54.7;63.0] | 429 | 59.4 [55.0;63.6] |
Weight status | ||||||
 Underweight | 154 | 8.4 [6.1;11.2] | 73 | 7.5 [4.7;13.2] | 81 | 9.1 [6.0;13.8] |
 Normal weight | 1322 | 72.9 [70.0;75.7] | 714 | 74.8 [70.7;78.4] | 608 | 71.2 [66.7;75.3] |
 Overweight | 171 | 10.7 [8.79;13.0] | 94 | 10.6 [8.1;13.7] | 77 | 10.9 [8.1;14.5] |
 Obesity | 123 | 8.0 [6.4;10.0] | 55 | 10.3 [5.1;10.0] | 68 | 8.7 [6.4;11.8] |
Socioeconomic status | ||||||
 Low | 260 | 22.6 [19.7;25.8] | 142 | 22.4 [18.9;27.6] | 118 | 22.3 [18.3;26.8] |
 Moderate | 1086 | 60.0 [56.8;63.1] | 579 | 60.6 [56.0;64.8] | 507 | 59.6 [54.9;64.0] |
 High | 372 | 17.4 [15.3;19.7] | 187 | 16.5 [15.2;21.6] | 185 | 18.2 [15.2;21.6] |
Physical activity | ||||||
 Low | 212 | 14.4 [12.2;16.9] | 157 | 20.1 [17.2;24.7] | 55 | 8.4 [6.0;11.7] |
 Medium | 1224 | 69.2 [66.1;72.1] | 641 | 68.5 [65.4;74.0] | 583 | 69.9 [64.1;72.4] |
 Sufficient | 271 | 16.4 [14.2;18.9] | 102 | 10.8 [08.5;13.8] | 169 | 21.6 [18.0;25.7] |
Media consumption | ||||||
 Moderate | 407 | 22.0 [19.7;24.7] | 220 | 24.3 [20.8;28.2] | 187 | 20.1 [16.9;23.7] |
 Frequent | 403 | 21.6 [19.3;24.2] | 216 | 22.5 [19.3;26.1] | 187 | 20.8 [17.5;24.6] |
 Extensive | 960 | 56.2 [53.2;59.3] | 501 | 53.2 [48.9;57.4] | 460 | 59.2 [54.8;63.4] |
Social support | Â | |||||
 Low | 488 | 29.6 [26.7;32.6] | 199 | 21.2 [18.0;24.9] | 289 | 37.5 [33.1;42.1] |
 Moderate | 776 | 44.9 [41.7;48.0] | 415 | 46.5 [42.2;50.9] | 362 | 43.3 [38.9;47.8] |
 High | 436 | 25.6 [23.0;28.4] | 287 | 32.3 [28.4;36.5] | 149 | 19.2 [15.9;22.9] |
Self-efficacy | Â | |||||
 Low | 511 | 30.4 [27.5;33.4] | 315 | 35.8 [31.7;40.1] | 196 | 25.2 [21.3;29.5] |
 Moderate | 745 | 43.5 [40.5;46.7] | 374 | 40.6 [36.3;45.0] | 371 | 46.5 [41.9;51.1] |
 High | 418 | 26.0 [23.3;28.9] | 204 | 23.6 [20.0;27.4] | 214 | 28.3 [24.2;32.8] |
HRQoL1 | ||||||
 Physical well-being |  | 48.5 [47.9;49,1] |  | 46.9 [46.0;47.7] |  | 50.1 [49.2;50.9] |
 Psychological well-being |  | 50.7 [50.1;51.3] |  | 49.2 [48.3;50.1] |  | 52.1 [51.2;52.9] |
 Autonomy & Parent relation |  | 54.0 [53.5;54.6] |  | 53.4 [52.7;54.2] |  | 54.6 [53.8;55.4] |
 Social support & peers |  | 51.4 [50.8;52.0] |  | 51.9 [51.1;52.6] |  | 51.0 [50.1;51.8] |
 School environment |  | 51.1 [50.5;51.6] |  | 51.1 [50.4;51.8] |  | 51.0 [50.2;51.9] |