Efficacy of the Lunch is in the Bag intervention to increase parents’ packing of healthy bag lunches for young children: a cluster-randomized trial in early care and education centers

Table 6 Percent of parents who packed chips and sweets in the child’s lunch

	Intervention Percent (Standard Error)	Control Percent (Standard Error)
Chips
Pre-Intervention Baseline	35.1 (4.5)	48.0 (4.4)
Post-Intervention 6-week follow-up	30.7 (4.5)	39.7 (4.4)*
Pre-Booster 22-week follow-up	35.0 (4.5)	40.6 (4.5)*
Post-Booster 28-week follow-up	40.1 (4.5)	40.2 (4.5),***
Sweets
Pre-Intervention Baseline	68.5 (4.7)	66.4 (4.6)
Post-Intervention 6-week follow-up	61.9 (4.7)*	65.4 (4.6)
Pre-Booster 22-week follow-up	61.2 (4.7),***	69.0 (4.7)
Post-Booster 28-week follow-up	64.4 (4.8)	68.0 (4.7)

*within-groups change baseline to follow-up P < .05, **P < .01, ***P < .001
****treatment-by-time interaction baseline to follow-up P < .05, *****P < .01, ******P < .001
Means and standard errors are based on mixed-effects models of the treatment-by-time interaction that adjusted for repeated measures within families and nesting of families within ECE centers. The models were based on data from 4712 lunches packed by parents for their preschool children. Each model compared the given measurement period to baseline. The models also were adjusted for gender, age, heritage, parental marital status and parental education. Percent of parents packing the given foods was based on the occurrence of any amount of the food on at least one of the two days in the measurement period

ISSN: 1479-5868