Objective: To test the main, additive and interactive effects of 6 intervention components reflecting differing levels of supports for healthy family mealtimes on reducing childhood obesity.
Description: Using the Multiphase Optimization Strategy, we are currently testing 6 intervention components in a Screening Phase in Head Start families (N¼520), which will result in the implementation and evaluation of a ‘‘final’’ intervention model in the Confirming Phase (N¼250).
Evaluation: Screening Phase analyses will test, on an intent-to-treat basis using ANOVA models, whether each intervention factor has a significant effect on frequency of healthy, family mealtimes and dietary quality pre- to post-intervention.
Conclusions and Implications: Results will inform policy (e.g. where limited resources may be best allocated) and interventions (e.g. most effective strategies for promoting mealtimes).