Welk 2019.

Study name	SWITCH Implementation effectiveness trial
Methods	Study design: cluster‐randomised controlled superiority trial
Participants	School type: primary school; children aged 9–11 years Region: USA.
Interventions	Number of experimental conditions: 2: standard implementation (control) and enhanced implementation (intervention) Policies, practices or programmes targeted by the intervention: aims to impact obesity through diet, PA and sedentary behaviour Implementation strategies EPOC: audit and feedback ‐ Feedback throughout the implementation process ‐ Checkpoint sessions EPOC: educational materials ‐ Provided with information about how to capitalise on support from local 4H programme leaders in their county EPOC: tailored interventions ‐ Personalised, web‐based training based
Outcomes	Outcome relating to the implementation of childcare service policies, practices or programmes ‐ Average weekly tracking rate ‐ Adherence to quality elements ‐ Adherence to best practices
Starting date	5 August 2019
Contact information	Gregory Welk, Barbara E Forker Professor of Kinesiology, Iowa State University
Notes	Trial registration: NCT04045288