Table 2.
BMI z-score at baseline and 4-year follow-up post-intervention in the intervention and control groups
| Baselinec | 4-year follow-up post-intervention | Change baselinec to 4-year follow-up post-intervention | Baselinec vs. 4-year follow-up post-intervention | Intervention vs. control | |
|---|---|---|---|---|---|
| Mean (95% CI) | Mean (95% CI) | Mean (95% CI) | p-valueb | p-valued | |
| BMI Z-scorea | |||||
| Intervention | |||||
| Boys | 0.57 (0.40 to 0.74) | −0.09 (−0.25 to 0.08) | −0.67 (−0.80 to −0.54) | <0.001 e | 0.282 |
| Girls | 0.44 (0.26 to 0.61) | −0.23 (−0.39 to −0.07) | −0.65 (−0.78 to −0.51) | <0.001 e | 0.003 |
| Total | 0.51 (0.38 to 0.63) | −0.15 (−0.27 to −0.04) | −0.58 (−0.75 to −0.56) | <0.001 e | 0.003 |
| Control | |||||
| Boys | 0.16 (−0.12 to 0.44) | −0.37 (−0.66 to −0.09) | −0.54 (−0.72 to −0.35) | <0.001 e | |
| Girls | 0.30 (0.08 to 0.53) | −0.01 (−0.23 to 0.21) | −0.32 (−0.45 to −0.18) | <0.001 e | |
| Total | 0.24 (0.06 to 0.42) | −0.17 (−0.35 to 0.00) | −0.41 (−0.53 to −0.30) | <0.001 e | |
BMI body mass index, CI confidence interval, WHO World Health Organization
Bold text indicates significant p-values
The 4-year follow-up post-intervention measurements were conducted over the 2014 academic year in Reus (intervention group) and in Cambrils, Salou and Vila-seca (control group)
aThe BMI z-score was calculated from the WHO “Growth reference 5–19 years” tables
bGeneral Linear Mixed Models of repeated measures
cbaseline (2007–2008)
dFisher’s exact test
erepeated measures General Linear Mixed Models