Table 1.

Eligibility criteria

Criterion	Definition
Guidance	● Full-length document providing advice and specific recommendations on key concepts and/or steps, principles, and strategies for adapting population health interventions in new contexts. ● The included documents may be intended for researchers, practitioners, and/or funders to support in their use of methods and conduct of research on intervention adaptation.
Document type	● Peer-reviewed papers: research, analysis, or methodological papers. ● Non peer-reviewed documents: dissertations, theses, books, book chapters, governmental and non-governmental reports, and working papers (i.e. documents issued by local, regional, or national governments or by their agencies or subdivisions, as well as those written and published by non-governmental organisations).
Adaptation	● Modifications made to the content of interventions and their implementation AND/OR ● Modifications made to the context in which interventions are delivered AND/OR ● Modifications made during the evaluation processes
New context	● Characterised by differences in geographical, epidemiological, socio-cultural, socio-economic, ethical, legal, and/or political determinants. NB: Guidance papers which describe scale-up of interventions will be included only if the scale-up is described with regard to changes in any of the above-mentioned determinants (e.g. taking interventions tested in a specific geographical district for full-scale implementation in other districts, which differ in their contextual profile, such as population and socio-economic determinants).
Population health interventions	● Interventions, programmes, and policies which seek to change the population distribution of risk. ● These interventions can be delivered to whole populations, defined sub-populations (based on age or other characteristic), or specific groups with increased levels of risk. ● Interventions may encompass public health or health services research.
Language	● Papers written in English, German, French, Italian, Russian, or Swedish.
Geographical location	● Any