Lifestyles of adolescents of the intervention and control groups (comparison of the baseline to the end of study)
| Intervention group (n=94) | Control group (n=98) | P value† intervention versus control | |||||
| Baseline % (n) | End of intervention % (n) | P value* | Baseline % (n) | End of intervention % (n) | P value* | ||
| Primary outcomes | |||||||
| ≥1 Fruit / day | |||||||
| Boys | 39.5 (15) | 44.4 (17) | 0.729 | 27.6 (12) | 29.3 (13) | 0.958 | 0.517 |
| Girls | 34.6 (21) | 39.2 (23) | 0.683 | 46.9 (23) | 43.5 (21) | 0.814 | 0.210 |
| Total | 36.5 (36) | 41.2 (40) | 0.538 | 37.7 (35) | 36.7 (34) | 0.927 | 0.655 |
| Physical activity ≥6 hours/week | |||||||
| Boys | 86.8 (33) | 83.9 (32) | 0.864 | 86.7 (39) | 87.6 (39) | 0.994 | 0.335 |
| Girls | 69.7 (42) | 81.2 (49) | 0.145 | 69.4 (34) | 67.3 (33) | 1.000 | 0.654 |
| Total | 76.3 (75) | 82.2 (81) | 0.355 | 77.7 (73) | 77.1 (72) | 0.984 | 0.299 |
| Secondary outcomes | |||||||
| ≥1 vegetable / day | |||||||
| Boys | 21.1 (8) | 31.2 (12) | 0.433 | 15.6 (7) | 21.2 (10) | 0.668 | 0.728 |
| Girls | 26.7 (16) | 35.3 (21) | 0.239 | 30.6 (15) | 25.0 (12) | 0.661 | 0.757 |
| Total | 24.5 (24) | 33.7 (33) | 0.112 | 23.4 (22) | 23.2 (22) | 0.999 | 0.735 |
| Screen time ≤2 hour weekdays | |||||||
| Boys | 52.6 (20) | 46.9 (18) | 0.737 | 55.6 (25) | 55.7 (25) | 1.000 | 0.806 |
| Girls | 43.3 (26) | 54.4 (33) | 0.217 | 49.0 (24) | 57.1 (28) | 0.344 | 0.409 |
| Total | 46.9 (46) | 51.5 (51) | 0.564 | 52.1 (49) | 56.4 (53) | 0.538 | 0.451 |
| Screen time ≤2 hour weekend | |||||||
| Boys | 18.4 (7) | 21.8 (8) | 0.836 | 15.6 (7) | 16.5 (7) | 0.986 | 0.587 |
| Girls | 25.0 (15) | 29.5 (18) | 0.700 | 25.7 (13) | 22.4 (11) | 0.856 | 0.233 |
| Total | 22.4 (22) | 26.5 (26) | 0.562 | 20.8 (20) | 19.6 (18) | 0.925 | 0.497 |
| Every day all sugary drink consumption | |||||||
| Boys | 47.5 (18) | 48.3 (18) | 0.877 | 51.1 (23) | 45.0 (20) | 0.685 | 0.624 |
| Girls | 55.0 (33) | 51.2 (31) | 0.748 | 54.2 (27) | 61.2 (30) | 0.715 | 0.451 |
| Total | 52.1 (51) | 50.1 (49) | 0.789 | 52.7 (50) | 53.4 (50) | 0.962 | 0.678 |
| Never fast-food consumption/week | |||||||
| Boys | 86.8 (33) | 87.5 (33) | 0.917 | 86.4 (39) | 77.0 (35) | 0.398 | 0.810 |
| Girls | 91.7 (55) | 90.3 (54) | 0.915 | 79.6 (39) | 79.6 (39) | 1.000 | 0.305 |
| Total | 89.8 (88) | 89.2 (87) | 0.874 | 82.9 (78) | 78.3 (74) | 0.546 | 0.503 |
The main analysis was based on the intention-to-treat population.
*P value: McNemar tests (changes in each group).
†P value: generalised linear models (differences in the changes from baseline to the end of intervention in the intervention and control group).