Skip to main content

Table 2 BMI z-score at baseline and 4-year follow-up post-intervention in the intervention and control groups

From: Follow-up of a healthy lifestyle education program (the EdAl study): four years after cessation of randomized controlled trial intervention

  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  
  1. BMI body mass index, CI confidence interval, WHO World Health Organization
  2. Bold text indicates significant p-values
  3. 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)
  4. aThe BMI z-score was calculated from the WHO “Growth reference 5–19 years” tables
  5. bGeneral Linear Mixed Models of repeated measures
  6. cbaseline (2007–2008)
  7. dFisher’s exact test
  8. erepeated measures General Linear Mixed Models