Nutrition and physical activity randomized control trial in child care centers improves knowledge, policies, and children’s body mass index

Table 4 Child-level zBMI change from pre- to post-intervention (n = 209)

Variable	Coefficient estimate (SE)	95% CI	t-statistic (df)	p-value
California (Reference: North Carolina)	0.11 (0.07)	(-0.04, 0.25)	1.59 (13)	0.14
Connecticut (Reference: North Carolina)	0.05 (0.07)	(-0.10, 0.19)	0.73 (13)	0.48
Parent education (reference: ≤ High School)	0.18 (0.06)	(0.06, 0.30)	2.93 (169)	0.004
Poverty level (reference: ≤ 100% FPG)	0.03 (0.06)	(-0.09, 0.15)	0.52 (169)	0.60
Intervention (reference: controls)	-0.14 (0.06)	(-0.26, -0.02)	-2.54 (13)	0.02
Intercept	-0.09 (0.08)	(-0.26, 0.07)	-1.22 (13)	0.24

Note: HLM (with random center intercept) controlling for state, parent education and family poverty status.
FPG = Federal Poverty Guidelines; zBMI = age- and sex-specific standardized body mass index.

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