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Table 2 Baseline data descriptive statistics

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

Variable

N

Mean

SD or IQR

N

Mean

SD or IQR

Mean height (cm)

287

149.44

7.42

284

149.27

7.04

 

Median weight (kg)c

287

41.90

35.90 to 49.30

284

41.50

37.15 to 49.05

BMI (kg/m2)

287

19.53

3.70

284

19.48

3.44

BMI SDSd

285

0.38

1.21

279

0.40

1.16

 

N

Median

25 IQR

75 IQR

N

Median

25 IQR

75 IQR

IMD score summary statistic

287

17.99

9.81

35.35

282

15.68

9.29

23.91

Accelerometer provision

Na

Nb

%

 

Na

Nb

%

 

Proportion with valid weekday data (≥2 valid weekdays)e

286

276

96.50

 

282

273

96.81

 

Proportion with valid weekend day data (≥1 valid weekend days)

286

221

77.27

 

282

210

74.47

 

Weekday accelerometer data

N

Median

25 IQR

75 IQR

N

Median

25 IQR

75 IQR

Total valid weekday mins

280

3519.17

2715.08

4027.58

280

3267.00

2571.50

3972.08

Average valid weekday mins

280

787.46

725.35

832.69

280

779.36

724.32

829.31

Total valid weekday CPM

280

431.78

352.53

523.02

280

476.30

396.17

555.07

Average weekday MVPA mins

280

49.15

37.38

60.65

280

53.25

41.50

68.03

Average weekday light PA mins

280

193.27

166.71

219.80

280

196.57

171.62

225.75

Average weekday sedentary mins

280

528.35

474.25

581.08

280

520.26

463.47

568.38

Weekend accelerometer data

N

Median

25 IQR

75 IQR

N

Median

25 IQR

75 IQR

Total valid weekend day mins

221

1238.50

655.00

1440.00

210

1215.33

660.50

1389.00

Average valid weekend day mins

221

694.75

618.17

759.17

210

675.96

609.75

736.08

Total valid weekend day CPM

221

378.64

296.24

533.03

210

416.18

324.03

558.45

Average weekend day MVPA mins

221

32.50

22.17

48.33

210

35.38

24.58

54.33

Average weekend day light PA mins

221

181.50

154.42

214.08

210

192.83

155.08

223.75

Average weekend day sedentary mins

221

476.58

398.00

529.42

210

437.25

384.83

492.50

Psychosocial variables

N

Mean

SD

N

Mean

SD

Autonomous motivation dance

287

3.91

0.58

284

3.91

0.65

Autonomous motivation PA

287

4.01

0.63

284

3.96

0.74

Controlled motivation dance

287

1.95

0.72

284

1.94

0.63

Controlled motivation PA

287

2.25

0.76

284

2.17

0.74

Autonomy need satisfaction

287

5.67

1.00

284

5.62

1.05

Competence need satisfaction

287

5.24

1.19

284

5.17

1.23

Relatedness need satisfaction

287

5.89

1.26

284

5.89

1.31

Self esteem

287

4.96

0.81

284

4.97

0.77

  1. Na – N of participants with any valid accelerometer data
  2. Nb – N of participants meeting inclusion criteria
  3. cMedian & IQR reported for weight as it is non normal
  4. dAge adjusted BMI score. Missing data due to no date of birth being reported
  5. ePercentage of girls who had ≥2 valid week days of accelerometer data at T0.
  6. PA - Physical Activity
  7. MVPA – Moderate-to-vigorous intensity physical activity
  8. CPM - Counts per minute