Statistical analysis
REGRESSION, SECONDARY
Analysis was undertaken using SAS version 9.3 by a blinded statistician. Analyses were performed on services that completed the post-intervention follow-up survey, with ECEC services as the unit of analysis. Descriptive statistics were used to describe service demographics and Nominated Supervisor characteristics of the sample.Intervention effects on the primary trial outcome were assessed using separate logistic regression analyses to examine differences in Guideline adoption (e-newsletter vs. animated video; e-newsletter vs. control; animated video vs. control), controlled for service size, location/remoteness, and date of survey completion.Dichotomous secondary outcomes (awareness, knowledge and implementation of the Guideline) were assessed using separate logistic regression analyses similar to the primary outcome.Continuous secondary outcomes (i.e. barriers to implementing the Guidelines) were calculated for each service by averaging the 3 items of each targeted TDF domain. Differences between the three arms were assessed through linear regression models, controlled for service size, location/remoteness, and date of survey completion.