Fig. 2.

Designs of nutrition research conducted in Africa for six major topics during the last decade. Only papers indexed as the major MeSH term ‘vitamin A deficiency’ (n 72), ‘protein–energy malnutrition’ (n 72), ‘obesity’ (n 224), ‘breastfeeding’ (n 306), ‘nutritional status’ (n 294) and ‘food supply’ (n 127) are included. Percentages for categories <5 % are not displayed (RCT, randomised controlled trial)