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Table 3 Means and standard deviations (SD) for anthropometric and physical activity data by trial arm at T0

From: Randomised feasibility trial of a teaching assistant led extracurricular physical activity intervention for 9 to 11 year olds: Action 3:30

  Control Intervention
  n Mean SD Min Max n Mean SD Min Max
BMI (kg/m2) 255 18.4 3.3 12.8 29.7 284 18.8 3.4 13.5 33.1
BMI SDS 248 0.51 1.2 -2.6 3.3 272 0.61 1.2 -2.1 3.4
Age (yrs) 248 10.0 0.55 9.1 11.1 272 10.1 0.59 7.8 11.1
IMD 248 19.8 17.0 2.9 67.6 277 21.5 17.7 1.4 66.2
MVPA weekday (mins) 228 60.2 23.0 21.1 187.4 241 59.2 21.8 23.2 155.3
CPM weekday 228 550.2 153.9 265.3 1346.1 241 546.6 146.8 261.9 1245.9
MVPA after school (mins)* 228 13.4 8.2 1.5 71.4 241 12.1 6.7 1.6 37.4
CPM after school* 228 612.0 331.1 11.1 2074.4 241 549.4 335.3 71.4 2604.9
  1. *MVPA recorded between 3.30 pm and 8.30 pm on schooldays (pupils with valid weekday accelerometer data).
  2. Valid MVPA weekdays/after school: Participant's accelerometer data met the overall wear time criteria of at least 500 minutes between 6 am and 11 pm mins on at least two weekdays.