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Table 2 Number of child care centers and children that participated in bi-annual CCHP BMI screenings by year and group allocation

From: Healthy apple program to support child care centers to alter nutrition and physical activity practices and improve child weight: a cluster randomized trial

Year Baseline Implementation
year 1
Follow-up Implementation
year 2
2011–2012 2012–2013 2013–2014 2014–2015
Group Allocation CCHP
+HAP
CCHP
+HAP
Delayed
CCHP
+HAP
CCHP
+HAP
Delayed
CCHP
+HAP
CCHP
+HAP
Delayed
CCHP
+HAP
CCHP
+HAP
Delayed
HAP Exposure No No Yes No No No Yes Yes
Number of child care centers randomized for the HAP pilot 19 24 19 24 19 24 19 24
Number of child care centers with complete BMI change data 12 18 14 17 17 20 15 19
Number of children enrolled in centers with complete data 522 380 430 361 529 416 502 353
Number of children by age
 2y 26 55 17 28 26 36 20 47
 3y 207* 153 156 155 205 149 195 137
 4y 282* 172 251* 175 293 223 251 154
 5y 7 0 6 3 5 8 36 15
  1. Study time was defined according to academic calendar year. CCHP Child Care Health Program, BMI Body mass index, HAP Healthy Apple Program; Child care centers were randomly allocated to the CCHP + HAP or CCHP + HAP Delayed group in Autumn 2012. Table 2 shows the total number of child care centers that were randomized, the number of centers that participated in both annual Autumn and Spring BMI screenings each year, and the number of children that participated in both BMI screenings each year, by intervention allocation. Complete data from both BMI screenings were required to calculate the primary outcome, annual change in BMI percentile between the Autumn and Spring screenings. Child care centers and children with missing BMI change data in any given year were excluded from the evaluation analyses for that year. *The age of children served differed significantly by intervention group assignment, P < 0.05