TABLE 3

Changes in Primary and Secondary Outcomes

OutcomeaBaseline8 MonthsChangeP ValueAdjusted Difference in Change P Value
BMI
 Intervention20.7 ± 0.6421.3 ± 0.640.60 ± 0.09<.0010.0 ± 0.12b.84
 Control20.6 ± 0.5721.2 ± 0.570.61 ± 0.08<.001
Waist circumference, cm
 Intervention77.1 ± 1.8977.1 ± 1.890.0 ± 0.33.980.5 ± 0.45b.16
 Control77.0 ± 1.6976.5 ± 1.69−0.5 ± 0.31.10
Body fat, %
 Intervention20.3 ± 1.2721.6 ± 1.281.3 ± 0.35<.0010.0 ± 0.48.99
 Control22.5 ± 1.1423.8 ± 1.141.3 ± 0.33<.001
Grip strength, kg
 Intervention22.5 ± 0.9728.5 ± 0.986.0 ± 0.32<.0010.5 ± 0.45.30
 Control20.4 ± 0.8725.9 ± 0.885.5 ± 0.31<.001
Push-ups (repetitions)
 Intervention9.1 ± 0.999.8 ± 1.00.7 ± 0.35.040.9 ± 0.49b.04
 Control6.6 ± 0.896.5 ± 0.89−0.1 ± 0.34.73
Weekday PA, counts/minc
 Intervention538 ± 30.81515 ± 33.51−23 ± 18.08.21−19 ± 23.30.41
 Control477 ± 27.18473 ± 28.58−3 ± 14.69.81
Weekend PA, counts/mind
 Intervention435 ± 47.19410 ± 54.85−25 ± 40.25.53−8 ± 53.94b.57
 Control404 ± 42.42387 ± 47.13−17 ± 35.97.64
Weekday MVPA, %c
 Intervention8.6 ± 0.588.3 ± 0.63−0.4 ± 0.34.28−0.7 ± 0.44.14
 Control7.5 ± 0.517.8 ± 0.540.3 ± 0.28.30
Weekend MVPA, %d
 Intervention6.2 ± 0.786.0 ± 0.90−0.2 ± 0.67.73−0.1± 0.90b.80
 Control5.8 ± 0.705.7 ± 0.78−0.1 ± 0.60.82
Screen-time, min/d
 Intervention109 ± 14.18112 ± 14.523 ± 7.25.67−30 ± 10.08b.03
 Control132 ± 12.78165 ± 12.9433 ± 7.0<.001
SSB intake, glasses/d
 Intervention3.9 ± 0.403.1 ± 0.41−0.8 ± 0.19<.001−0.6 ± 0.26b.01
 Control3.9 ± 0.363.7 ± 0.36−0.1 ± 0.18.44
RT skill competencye
 Intervention31.7 ± 0.5640.1 ± 0.608.4 ± 0.48<.0015.7 ± 0.67<.001
 Control30.7 ± 0.5333.4 ± 0.552.7 ± 0.46<.001
  • Means ± standard errors are reported for all outcomes. MVPA, moderate to vigorous physical activity; PA, physical activity.

  • a All models were adjusted for school clustering and participant socioeconomic status.

  • b Variable transformed for analysis.

  • c A total of 240 and 120 participants wore accelerometers on weekdays at baseline and posttest, respectively.

  • d A total of 120 and 83 participants wore accelerometers on weekend days at baseline and posttest, respectively.

  • e Possible values range from 0 to 56.