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Table 4 Changes in minutes per day of MVPA at 7 and 14 (primary outcome) month follow-up between participants randomised to usual practice (control) or to the Girls Active programme (intervention)a

From: Effectiveness of the ‘Girls Active’ school-based physical activity programme: A cluster randomised controlled trial

  Number of schools | pupils Mean change from baseline (95% C.I.) Adjusted difference at follow-upb
Control Intervention Control Intervention Coefficient (95% C.I.) P-value ICC
Complete casec
 7 months 8 | 572 10 | 730 -6.18 (-7.30 to -5.06) -2.45 (-3.50 to -1.41) 2.42 (0.13 to 4.72) 0.039 0.03
 14 months 9 | 539 10 | 672 -3.47 (-4.91 to -2.03) -2.09 (-3.27 to -0.90) 1.75 (-0.80 to 4.29) 0.178 0.02
Per protocold
 7 months 8 | 572 8 | 586 -6.18 (-7.30 to -5.06) -1.91 (-3.11 to -0.72) 3.14 (0.93 to 5.35) 0.005 0.02
 14 months 9 | 539 8 | 549 -3.47 (-4.91 to -2.03) -1.46 (-2.74 to -0.18) 1.67 (-1.15 to 4.48) 0.246 0.02
Intention-to-treate
 7 months 10 | 885 10 | 867 -5.92 (-7.05 to -4.78) -2.50 (-3.57 to -1.44) 2.30 (0.25 to 4.35) 0.028 -
 14 months 10 | 885 10 | 867 -3.63 (-5.03 to -2.23) -2.01 (-3.20 to -0.81) 1.65 (-0.64 to 3.94) 0.158 -
  1. CI confidence interval; ICC intra-class correlation; MVPA moderate- to vigorous-intensity physical activity
  2. aIncluding pupils who have worn the accelerometer with a minimum of two valid days with at least one school day at baseline and 7 months, and at baseline and 14 months
  3. bDifference in the mean MVPA at follow-up adjusted for cluster effect, baseline MVPA value, participant year group, school percentage free school meal eligibility and stratification categories (school size and percentage of non-White pupils)
  4. cThose with missing outcome data or missing variables required for the model adjustment are excluded
  5. dSchools that did not engage with 70% of the programme have been excluded from this analysis
  6. eMissing data imputed using multiple imputation