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Table 2 Mean (95% confidence interval) physical activity level among participants stratified by study arm at baseline and follow-up

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

  PAL-intervention DWBH-intervention Control
  Baseline Follow-up Baseline Follow-up Baseline Follow-up
Physical activity
levels full day
 N 500 317 406 229 566 288
 Wear time (min/day) 776 (765, 787) 763 (751, 776) 775 (763, 787) 768 (754, 782) 770 (759, 781) 742 (729, 754)
 Average PA (cpm) 510 (479, 541) 497 (464, 531) 531 (497, 565) 476 (439, 513) 537 (505, 569) 489 (455, 524)
 MVPA (min/day) 67 (63, 72) 65 (60, 70) 70 (65, 75) 63 (57, 68) 71 (66, 76) 65 (60, 70)
 Sedentary time (min/day) 541 (533, 548) 553 (545, 561) 534 (526, 542) 559 (550, 567) 531 (523, 538) 548 (540, 557)
Physical activity
school hours
 N 536 375 427 284 583 353
 Wear time (min/day) 322 (313332) 312 (303, 322) 321 (311, 331) 323 (312, 333) 314 (304, 324) 292 (282, 302)
 Average PA (cpm) 444 (398, 489) 462 (415, 508) 504 (456, 553) 411 (361, 461) 501 (455, 547) 433 (385, 481)
 MVPA (min/day) 25 (21, 28) 25 (22, 28) 28 (25, 32) 24 (20, 28) 29 (25, 32) 24 (20, 27)
 Sedentary time (min/day) 227 (221, 232) 230 (228, 240) 217 (211, 223) 234 (228, 240) 220 (215, 225) 227 (222, 233)
  1. PAL Physically active learning; DWBH Don’t Worry – Be Happy, cpm Counts per minute; MVPA Moderate- to vigorous-intensity physical activity. All analyses are adjusted for gender, wear time (except cpm), school cluster, class cluster and subject ID as random effect