Evaluation of a cluster-randomized controlled trial: Communities for Healthy Living, family-centered obesity prevention program for Head Start parents and children

Table 5 Primary outcomes: Estimated mean change in BMIz and modified BMIz scores from baseline to follow-up among Greater Boston Head Start children (n = 3750)

	Mean (SD) values by timepoint		Mean (SD) values by timepoint		Estimated change in outcome (Intervention vs. control)
	Control (n = 2476)		Intervention (n = 1274)		Model 1.1	Model 1.2
	Baseline	Change	Baseline	Change	Unadjusted ^{a, b}	Fully Adjusted ^a,^c
BMIz	0.64 (1.20)	−0.01 (0.42)	0.58 (1.26)	0.04 (0.44)	0.06 (0.02, 0.09) **	0.06 (0.02, 0.10) **
Modified BMIz	0.63 (1.40)	−0.02 (0.45)	0.57 (1.42)	0.05 (0.46)	0.07 (0.03, 0.10) ***	0.07 (0.03, 0.12) **

^a Stars indicate significance *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001. Baseline = fall; follow-up = spring; change = follow-up – baseline
^b Results from an unadjusted linear mixed effects regression model; shown is the mean unadjusted change (95% confidence interval) in outcomes for children exposed to intervention relative to control
^c Results from a linear mixed effects regression model, adjusting for parent race and ethnicity, educational attainment, and household employment status; shown is the mean adjusted change (95% confidence interval) in outcomes for children exposed to intervention relative to control

ISSN: 1479-5868