Qualitative evidence syntheses: Assessing the relative contributions of multi-context and single-context reviews.

Multi- and single-context syntheses fulfil complementary functions. Single-context syntheses add nuances not identifiable in the remit and timescales of a multi-context review. Impact This study offers a unique comparison between multi-context and single country (Nigeria and Kenya) qualitative syntheses exploring facility-based birth. Clear strengths and weaknesses were identified to inform commissioning and application of future syntheses. Characteristics can inform the commissioning of single- and multi-context nursing-oriented reviews across the world.