Figure 1

Flow of schools and pupils through trial. Np = Number of participants. For the outcome measurements the (%) is the% of participants for each measure who have an outcome measure out of those who had a baseline measure. Outcomes are grouped by collection type – e.g. all participants with valid accelerometer data will have time spent in MVPA and time spent in sedentary behaviour; those with weight and height will have BMI z-score and general overweight/obesity.