Height of children and parents
| Height of children (cm) | Control (n=237) | Intervention (n=272) | Total | p Value* |
| 2006 | 120.8 (120.1 to 121.7) | 118.4 (117.5 to 119.3) | 120.2 (119.6 to 120.9) | <0.001 |
| 2008 | 130.9 (130.12 to 131.8) | 132.0 (131.0 to 133.0) | 131.2 (130.5 to 131.9) | — |
| Control (n=144) | Intervention (n=208) | Total | p Value† | |
| Height of father (cm) | 1.74 (0.07) | 1.75 (0.07) | 1.75 (0.07) | NS |
| Control (n=153) | Intervention (n=214) | Total | p† | |
| Height of mother (cm) | 1.61 (0.07) | 1.62 (0.07) | 1.61 (0.07) | NS |
* Estimated marginal means and 95% CI obtained by multivariate analysis of variance for repeated measures (adjusted for school): p<0.001. (Outcome effect: interaction between the height of children progression over 2 years and type of intervention.)
† Mean (SD). Student t test analysis for independent variables.