Data collection and measures
Outcomes were assessed post-intervention only, between October and December 2021 (within 3 months following the distribution of the intervention dissemination strategies) as this was considered a period where the COVID-19 specific Guidelines were most relevant to change in ECEC service practices. Data was collected via a survey completed by service Nominated Supervisors or delegate, either online or via telephone, administered according to a standard protocol by trained interviewers who were blinded to group allocation.