Skip to main content

Table 4 Means and standard deviations by trial arm and linear mixed model adjusted for imbalance at baseline for accelerometer assessed secondary outcomes at T1 and T2

From: Effect and cost of an after-school dance programme on the physical activity of 11–12 year old girls: The Bristol Girls Dance Project, a school-based cluster randomised controlled trial

  Control Intervention
  n Mean SD n Mean SD Intervention vs Control adjusted difference in means (95 % CI)* P value
  T2  
Mean weekend day minutes of MVPA 145 36.56 26.16 124 39.65 23.21 −1.75 [−7.51 to 4.01] 0.552
Mean weekday CPM 262 446.83 137.81 246 478.75 144.94 −2.44 [−25.25 to 20.38] 0.834
Mean weekend CPM 145 405.04 228.96 124 450.98 263.89 −4.11 [−61.07 to 52.86] 0.888
Proportion of girls meeting 60 mins MVPA per weekday a 262 0.32 0.47 246 0.39 0.49 −1.18 [ −1.82 to 0.76] 0.458
Proportion of girls meeting 60 mins MVPA per weekend day a 145 0.12 0.33 124 0.15 0.36 −1.11 [−2.39 to −0.52] 0.787
Mean weekday sedentary mins 262 533.01 80.54 246 515.12 80.22 −6.79 [−23.60 to 10.03] 0.429
Mean weekend sedentary mins 145 475.14 95.22 124 463.66 105.92 0.62 [−22.42 to 23.66] 0.958
  T1  
Mean weekend day minutes of MVPA 159 42.57 27.71 130 48.92 32.19 1.26 [−5.70 to 8.22] 0.723
Mean weekday CPM 265 500.35 177.32 256 529.42 157.72 −7.48 [−35.06 to 20.11] 0.595
Mean weekend CPM 159 492.21 371.47 130 543.67 284.39 6.27 [−72.10 to 84.65] 0.875
Proportion of girls meeting 60 mins MVPA per weekday a 265 0.42 0.49 256 0.47 0.50 −1.11 [−1.68 to −0.73] 0.637
Proportion of girls meeting 60 mins MVPA per weekend day a 159 0.17 0.38 130 0.27 0.45 −0.82 [−1.56 to −0.43] 0.543
Mean weekday sedentary mins 265 522.96 85.46 256 502.91 87.01 −7.72 [−27.32 to 11.87] 0.449
Mean weekend sedentary mins 159 464.13 92.28 130 452.46 98.21 - 8.94 [−31.91 to 14.04] 0.446
  1. *For between group differences the control group is the reference group with models adjusted for baseline value, LEA, school size, school level deprivation and school-level clustering
  2. aOdds ratio presented in Coefficient column
  3. MVPA moderate-to-vigorous physical activity
  4. CPM counts per Minute