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Table 5 Adjusted between-group differences in physical activity variables at Time 1 and Time 2

From: Results of a feasibility cluster randomised controlled trial of a peer-led school-based intervention to increase the physical activity of adolescent girls (PLAN-A)

  Control Intervention  
Variable n Mean ± SD n Mean ± SD Intervention vs. control adjusted difference in means (95% CI)a
  Time 0
Mean weekday MVPA (mins)b 128 59.79 ± 21.57 225 55.07 ± 21.57 -
Mean weekend day MVPA (mins) 69 45.33 ± 31.31 154 45.11 ± 30.53 -
Mean weekday sedentary (mins) 128 471.84 ± 73.98 225 503.40 ± 79.74 -
Mean weekend sedentary (mins) 69 442.05 ± 121.07 154 451.11 ± 95.00 -
  Time 1
Mean weekday MVPA (mins)b 95 61.19 ± 22.10 177 60.72 ± 22.45 1.11 [-4.31, 6.55]
Mean weekend day MVPA (mins) 37 45.07 ± 30.21 91 41.80 ± 27.49 -3.88 [-13.57, 5.81]
Mean weekday sedentary (mins) 95 522.37 ± 87.74 177 509.87 ± 81.67 -31.8 [-57.44, -6.18]
Mean weekend sedentary (mins) 37 461.29 ± 112.19 91 534.73 ± 188.56 67.43 [-51.34, 186.20]
  Time 2
Mean weekday MVPA (mins)b 81 54.31 ±19.56 162 58.65 ± 22.21 6.09 [1.43, 10.76]
Mean weekend day MVPA (mins) 35 37.95 ± 32.14 74 46.57 ± 37.52 11.45 [-2.25, 25.15]
Mean weekday sedentary (mins) 81 511.65 ± 103.21 162 510.78 ± 85.29 -23.26 [-43.73, -2.79]
Mean weekend sedentary (mins) 35 473.06 ± 93.74 74 471.95 ± 97.20 -5.25 [-41.19, 30.69]
  1. a The control group is the reference group for between group comparisons. Models are adjusted for baseline outcome value, N valid days accelerometer data & local authority and school-level clustering.
  2. b A priori primary outcome in a future definitive trial