Evaluating the California Wellness Foundation's Health Improvement Initiative: a logic model approach.

The difficulties of conducting randomized trials to evaluate community-based initiatives have led some researchers to argue in favor of a case study "logic model" approach to evaluation. This article describes a case study logic approach adopted for the evaluation of one community initiative, the Health Improvement Initiative (HII) funded by the California Wellness Foundation (TCWF). The HII is a comprehensive, community-based initiative designed to improve population health by implementing and sustaining community-level systems changes. Nine communities received funding to create broad-based community coalitions (Health Partnerships) that were charged with developing and implementing action plans around systems change. The HII is being evaluated using a case-study logic-model approach that uses quantitative and qualitative data to construct indicators of coalition functioning, systems changes, and population health. By examining the relationship between these indicators over time, it should be possible to determine if any changes in intermediate or long-term outcomes are associated with Health Partnership activities.