Developing middle-range theories within a realist evaluation of how health committees support community capacity for health

Health committees link formalised health services and the community. However, 'how, why, and for whom' health committees work warrants further exploration. This article presents the development of a middle-range theory for how health committees work for building community capacity for health. Resulting programme theories from a realist evaluation in Uganda were synthesised for demi-regularities and supplemented by four key informant interviews - substantive theories were used to help explain the findings from the case studies to develop the final middle-range theories. Eighteen existing programme theories and 47 supporting context-mechanism-outcome configurations were synthesised into four middle-range theories for how health committees work for community capacity building for health at the individual, organisational, community and societal levels. The middle-range theories developed in this study provide important insight for those implementing health committees. Given the little guidance available for developing and refining middle-range theories, this study provides transparent methodological processes, which may assist future research.