| Individual intervention (n = 76) | Collective intervention (n = 77) | p-value |
---|---|---|---|
Body mass index z-score | |||
 Baseline | 3.21 (3.10 to 3.32) | 3.13. (3.00 to 3.2) | 0.125 |
 12 months | 2.58 (2.46 to 2.70) | 2.72 (2.61 to 2.83) | 0.155 |
 p-value | < 0.0001 |  < 0.0001 |  |
 Absolute change | − 0.63 (-0.72 to -0.54) | − 0.41 (− 0.51 to − 0.31) |  < 0.001 |