Fig. 2From: Operations research in global health: a scoping review with a focus on the themes of health equity and impactBreakdown of operations research studies according to World Bank income classification of the country of focus – low-income (L), lower-middle-income (LM) or upper-middle-income (UM) – for (a) all studies (n = 1099) including studies about low- and middle-income countries in general or some combination of regions and/or L-, LM- and UM-income countries; and (b) studies focused on a single country only (n = 817)Back to article page