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Table 2 Means of proportion of activity intensity (%), standard deviations (SD) and number of scans made (n) during recess and lunch breaks

From: A stepped-wedge implementation and evaluation of the healthy active peaceful playgrounds for youth (HAPPY) intervention

Category Recess & lunch behaviour (%) Recess & lunch behaviour (%) Boys Obs. Recess & lunch behaviour (%) Girls Obs.
  Baseline M (SD) (n = 115) Follow-up M (SD) n = 599) Mean Diff.
Cohen’s d (p-value)
Baseline M (SD) (n = 59) Follow-up M (SD) (n = 299) Mean Diff.
Cohen’s d (p-value)
Baseline M (SD) (n = 56) Follow-up M (SD) (n = 300) Mean Diff.
Cohen’s d (p-value)
Intensity of Physical Activity (via SOPARC)
 Sedentary activities 57.5 (27.6) 49.8 (30.5) −7.7
0.26 (0.01)
52.5 (28.6) 42.9 (30.1) −9.6
0.3 (0.01)
62.8 (25.8) 56.8 (29.2) −6.0
0.2 (0.183)
 Walking 26.6 (20.1) 25.1 (18.3) 1.5
0.1 (0.4)
26.8 (18.5) 23.2 (15.8) −3.55
0.2 (0.1)
26.4 (21.8) 26.9 (20.3) + 0.5
0.02 (0.8)
 Vigorous activities (VPA) 15.0 (21.8) 25.1 (26.6) + 10.1
0.4 (< 0.001)
19.0 (25.1) 33.9 (27.6) + 14.85
0.6 (< 0.001)
10.8 (16.9) 16.3 (22.4) + 5.5
30.3 (0.03)
  Recess & lunch behaviour (VPA%)       
 Physical Activity observations (via SOPARC) M (SD) Baseline M (SD) Follow-up Mean Diff. Cohen’s d (p-value)       
 Hard Surface (n = 54 Baseline; n = 238 Follow-up) (i.e., Cement or Asphalt 8.7 (18.9) 13.7 (18.8) + 5.05
0.3 (0.004)
      
 Soft Surface (n = 60 Baseline; n = 361 Follow-up) (i.e., grass) 20.9 (22.8) 32.5 (28.4) + 11.6
0.4 (0.004)
      
  1. (N.B. As the data was non parametric, Mann-Whitney tests were applied)