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Table 4 The intervention effect on physical activity variables during the full day stratified by study arm and gender. The results are presented as mean differences in change (intervention arms vs controls) with 95% CI, P-values and ICC for school

From: The effect of a school-based intervention on physical activity, cardiorespiratory fitness and muscle strength: the School in Motion cluster randomized trial

 

n

Mean difference in change (95% CI)a

P

ICC

Girls

 PAL-intervention

 Average PA (cpm)

624

27.6 (−6.8, 62.0)

0.116

0.05

 MVPA (min/day)

624

4.7 (−0.5, 9.5)

0.052

0.06

 Sedentary (min/day)

624

−5.6 (− 14.0, 2.7)

0.189

0.02

 DWBH-intervention

 Average PA (cpm)

559

−11.8 (−49.4, 25.7)

0.537

0.05

 MVPA (min/day)

559

1.7 (−6.9, 3.4)

0.510

0.06

 Sedentary (min/day)

559

8.5 (−0.6, 17.7)

0.068

0.02

Boys

 PAL-intervention

 Average PA (cpm)

524

44.0 (−11.5, 100.8)

0.119

0.03

 MVPA (min/day)

524

4.0 (−3.1, 11.2)

0.268

0.05

 Sedentary (min/day)

524

−3.9 (−16.5, 8.7)

0.546

0.04

 DWBH-intervention

 Average PA (cpm)

479

−3.3 (−62.7, 56.1)

0.913

0.03

 MVPA (min/day)

479

0.1 (−7.5, 7.7)

0.981

0.05

 Sedentary (min/day)

479

5.9 (−7.4, 19.3)

0.384

0.04

  1. PAL Physically active learning; DWBH Don’t worry – Be happy, PA Physical activity, MVPA Moderate- to vigorous-intensity physical activity, min Minutes, cpm Counts per minute, CI Confidence interval, ICC Intraclass correlation coefficient
  2. aEach model contained fixed effects for intervention, time (baseline – follow-up) and intervention x time interaction, in addition to random effects for school, class and subject ID