Two-year scale-up dissemination study of a multi-strategic community-wide intervention promoting physical activity : a single-arm pre-post hybrid effectiveness-implementation trial
Background: Intervention trials that have demonstrated significant effects may not always replicate those effects when scaled up. This study aimed to test whether scaling-up a successful cluster randomized trial (the COMMUNICATE study, 9 intervention communities), which promoted population-level physical activity (PA), could promote PA in a broader citywide setting (29 communities) after two years