NCT04164277.

Study name	FirstStep2Health intervention
Methods	Study design: cluster‐RCT
Participants	Service type: centre‐based Country (region): USA Number of services participating: 6
Interventions	Number of conditions: 1 intervention, 1 control Intervention strategies: Health curriculum Children Curriculum: preschoolers will receive weekly, age‐appropriate, participatory learning co‐delivered by teachers and university student educators Partnerships Families Meetings: 3 face‐to‐face or virtual caregiver meetings where research staff will lead the meetings at Head Start centres (weeks 1, 8, and 16) to connect caregivers to each other, offer health information, and discuss behavioural change strategies Resources: Facebook‐based programme including 4 new habit‐formation tasks/week. Preschoolers, using stickers, will create 2 letters each week regarding a food or activity presented in the centre‐based programme that they liked or want to try at home. Letters will be sent privately to each caregiver, and caregivers will be asked to respond to the letters.
Outcomes	Outcomes relating to child dietary intake: Diet quality Outcomes relating to child anthropometric measures: Overweight, obesity, BMI z‐score
Starting date	September 2021
Contact information	Associate Professor Jiying Ling, lingjiyi@msu.edu
Notes	ClinicalTrials.gov: NCT04164277