Table 5.

Data collection facilitators

Facilitator	Decision regarding implementation in the main trial
‘Thank you’ vouchers to pupils following completion of the baseline assessments	Continue
The provision of an appointment schedule for the dental assessments and use of a researcher to collect pupils from class	Continue
Use of two dental teams (when possible) in school, to minimise time in schools and potential disruption for schools	Continue when possible
The presence of researchers in schools during data collection time points to assist with managing trial paperwork, answer queries about the trial, and support completion of the young person questionnaires (e.g. for help with reading or comprehension)	All local research teams to offer to go in to support follow-up data collection in schools, even at time points not involving clinical assessments
Asking pupils to complete their baseline questionnaire while waiting for their dental assessment	Continue, as opposed to holding separate questionnaire completion sessions
Asking pupils to complete the two parts of the baseline questionnaire together to save time. This had initially been divided into two parts to make it less overwhelming for pupils to complete and to allow it to be completed in two sittings if necessary	Combine into one questionnaire as completing both parts of the questionnaire at the same time was acceptable to pupils