Table 2

Eligibility criteria for synthesis by source

Criteria	Rationale for inclusion
Papers from systematic mapping
Primary studies Diabetes focus or where data on diabetes provision could be disaggregated	There was sufficient evidence to support a diabetes-specific focus matching the related primary study. Reviews were excluded from the synthesis in order to avoid synthesising first-order and second-order data (primary studies from eligible reviews were included)
Additional material
Peer-reviewed journal paper Primary research Qualitative findings children, young people or young adults /carers/clinicians’ views of provision Sole diabetes focus Published 2004 onwards Carried out in England, Wales or Scotland	Papers from reviews in systematic mapping: resolves difficulties around synthesising first-order and second-order data
	Scottish papers kept on file from mapping: a useful resource for future comparisons between different parts of UK
	Papers without abstracts kept on file from systematic mapping: as Paediatric Diabetes does not use abstracts, it was important to include papers without abstracts in the synthesis
	Hand-searches of reference lists of studies included in the synthesis: standard practice