Framework for grading strength of evidence in the mixed method cross-study analysis.

Qualitative narratives were also included within the matrix for community FGDs and photovoice. This allowed upgrading of the evidence grade when a narrative strongly suggested importance. Case-by-case decisions were taken where data were judged to not allow for a standardised approach for all barriers. Details of these decisions are evidenced in the matrix analysis results (S1 Table). Overall delay evidence gradings were similarly case by case.