Table 2

After-School Program Participants Adjusted Mean Differences (SE) by condition and pretest weight status.

Variable

Spring Posttest - Fall Pretest Adjusted Mean Change (SE)2

p1

Control Sites

HOP'N Sites

Yr. B

Yr. 1

Yr. 2

Yr. B

Yr. 1

Yr. 2


Body Mass Index (BMI)

.17

All Participants

0.3 (0.3)

0.9 (0.4)

0.2 (0.3)

0.7 (0.3)

0.1 (0.3)

0.1 (0.3)

< 85 Percentile BMI

0.6 (0.3)

0.5 (0.4)

0.4 (0.3)

0.4 (0.4)

0.2 (0.3)

0.1 (0.3)

≥ 85 Percentile BMI

0.0 (0.4)

1.3 (0.5)

0.1 (0.4)

1.0 (0.4)

0.1 (0.4)

-0.1 (0.3)

BMI Z-Score (BMIz)

.11

All Participants

0.1 (0.1)

0.1 (0.1)

0.0 (0.1)

0.1 (0.1)

-0.1 (0.1)

-0.1 (0.1)

< 85 Percentile BMIz

0.1 (0.1)

-0.1 (0.1)

0.1 (0.1)

0.0 (0.1)

-0.1 (0.1)

-0.2 (0.1)

≥ 85 Percentile BMIz

0.0 (0.1)

0.4 (0.2)

-0.1 (0.1)

0.2 (0.1)

0.0 (0.1)

-0.1 (0.1)


Note. BMI = Body Mass Index in Kg/m2. BMIz is age and gender standardized.

Yr. B = Baseline Year. Yr. 1 = Intervention year 1. Yr. 2 = Intervention year 2.

1Mixed model ANCOVA weight status by condition by year interaction test.

2Mixed model ANCOVA means adjusted for school random effect and condition, strata, year, demographic variables and demographic variable interactions with condition, strata, and year fixed effects. Demographic variables included S.E.S., race/ethnicity, and grade for BMI and BMIz. BMI means were also adjusted for age and gender.

Dzewaltowski et al. International Journal of Behavioral Nutrition and Physical Activity 2010 7:90   doi:10.1186/1479-5868-7-90

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