Data were cleaned using specially designed software (MAHUFFE Processing Software, available at: http://www.mrc-epid.cam.ac.uk/Research/Programmes/Programme_5/index.html) to remove the first day of data collection and any days with <500 min of recording (defined as a valid day).
On the fifth day of data collection, fieldworkers went to each household to collect the tags.
Of these, 117 (92.9%) completed the DNS on the first day of data collection and were included in the analyses.
At the first day of data collection, dental and study personnel traveled to the location of the youth clubs.
The first day of data collection was not used since it did not include a full day and helped to eliminate the threat of reactivity.
For the participants who had telephone, a prompt call to remind them about wearing the accelerometers was made after the second and fourth day of data collection.
The model was adjusted for child BMI SDS, parental BMI, household IMD score and hours of daylight on the first day of data collection.
Most survey participants - 154 or 60.2% - submitted contact reports on the first day of data collection (March 14), and the degree distribution had a mean of 8.0.
Three consecutive attempts were made on separate occasions to contact a designated student who was found to be absent on the first day of data collection.
