

Next, communities were categorized as having a high CE dose or a low CE dose, and differences between four high-dose and five low-dose communities were compared using a two-tailed t-test. CE dose at each time interval and change in screen time was correlated using Spearman’s rho. Monthly reports from nine intervention communities were quantified, and CE dose was calculated for each community overall, at 4 time intervals (6, 12, 18, and 24 months), and for each CE building block-social bonding, social bridging, social leveraging, empowerment, and civic engagement. We used data from CHL to estimate CE dose and examine its association with a successful outcome from CHL-reduction in children’s recreational screen time. The 2 year Children’s Healthy Living (CHL) intervention aimed to improve child behaviors known to affect obesity. However, processes to increase CE and estimate its dose within an intervention are not well understood. Increased community collective efficacy (CE), defined as social cohesion among neighbors and their willingness to intervene for common good, is associated with improved community health outcomes.
