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Table 5 Percent of parents who packed foods from the “My Plate” groups in the child’s lunch

From: 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

  Intervention Percent (Standard Error) Control Percent (Standard Error)
Fruit   
 Pre-Intervention Baseline 91.3 (2.6) 89.4 (2.5)
 Post-Intervention 6-week follow-up 93.7 (2.6)**** 86.3 (2.5)
 Pre-Booster 22-week follow-up 93.2 (2.6)**** 86.1 (2.6)
 Post-Booster 28-week follow-up 92.6 (2.6) 87.7 (2.6)
Vegetables   
 Pre-Intervention Baseline 52.8 (4.7) 45.8 (4.5)
 Post-Intervention 6-week follow-up 70.9 (4.7)***,****** 42.6 (4.6)
 Pre-Booster 22-week follow-up 58.2 (4.7) 45.9 (4.6)
 Post-Booster 28-week follow-up 65.1 (4.7)***,***** 45.5 (4.7)
Whole grains   
 Pre-Intervention Baseline 41.9 (5.0) 45.7 (5.0)
 Post-Intervention 6-week follow-up 47.3 (5.0)**** 39.1 (5.0)
 Pre-Booster 22-week follow-up 51.7 (5.1)**,****** 36.9 (5.1)*
 Post-Booster 28-week follow-up 46.8 (5.1)***** 36.0 (5.1)*
Refined grains   
 Pre-Intervention Baseline 91.0 (3.3) 85.8 (3.2)
 Post-Intervention 6-week follow-up 86.4 (3.3) 86.9 (3.3)
 Pre-Booster 22-week follow-up 80.9 (3.3)***,***** 87.8 (3.3)
 Post-Booster 28-week follow-up 86.7 (3.3) 85.2 (3.3)
Meats/beans/eggs/nuts   
 Pre-Intervention Baseline 89.3 (2.9) 93.5 (2.9)
 Post-Intervention 6-week follow-up 90.1 (2.9) 93.3 (2.9)
 Pre-Booster 22-week follow-up 93.4 (3.0) 92.9 (3.0)
 Post-Booster 28-week follow-up 87.6 (3.0) 91.9 (3.0)
Dairy   
 Pre-Intervention Baseline 82.3 (3.2) 83.8 (3.1)
 Post-Intervention 6-week follow-up 87.5 (3.2) 82.9 (3.2)
 Pre-Booster 22-week follow-up 81.1 (3.2) 84.7 (3.2)
 Post-Booster 28-week follow-up 84.4 (3.2) 82.4 (3.2)
  1. *within-groups change baseline to follow-up P < .05, **P < .01, ***P < .001
  2. ****treatment-by-time interaction baseline to follow-up P < .05, *****P < .01, ******P < .001
  3. Percentages 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