Making integration foundational in population health intervention research: why we need ?Work Package Zero?

Objectives: We aimed to identify when and how integration should take place within evaluations of complex population health interventions (PHIs). Study design: Descriptive analytical approach. Methods: We draw on conceptual insights that emerged through (1) a working group on integration and (2) a diverse range of literature on case studies, small-n evaluations and mixed methods evaluation studies. Results: We initially sought techniques to integrate analyses at the end of a complex PHI evaluation. However, this conceptualization of integration proved limiting. Instead, we found value in conceptual-izing integration as a process that commences at the beginning of an evaluation and continues throughout. Many methods can be used for this type of integration, including process tracing, realist evaluation, congruence analysis, general elimination methodology/modus operandi, pattern matching and contribution analysis. Clearly signposting when integrative methods should commence within an evaluation should be of value to the PHI evaluation community, as well as to funders and related stakeholders. Conclusions: Rather than being a tool used at the end of an evaluation, we propose that integration is more usefully conceived as a process that commences at the start of an evaluation and continues throughout. To emphasize the importance of this timing, integration can be described as comprising 'Work Package Zero' within evaluations of complex PHIs. (c) 2022 The Author(s). Published by Elsevier Ltd on behalf of The Royal Society for Public Health. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

This study aims to identify how and when integration should take place within evaluations of complex population health interventions (PHIs). Through analyzing a working group and relevant literature, it is found that integration should start at the beginning of an evaluation and continue throughout, rather than being a tool used at the end. Various methods can be used for this integration, which is valuable for the PHI evaluation community and funders.