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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