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

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

	Baseline^c	4-year follow-up post-intervention	Change baseline^c to 4-year follow-up post-intervention	Baseline^c vs. 4-year follow-up post-intervention	Intervention vs. control
	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	p-value^b	p-value^d
BMI Z-score^a
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

ISSN: 1471-2458