Socioeconomic inequality in the co-occurrence of anemia and stunting among adolescent girls aged 15–19 years in Sub-Saharan African countries: a decomposition analysis

Abstract Introduction Undernutrition, particularly stunting, and deficiency of micronutrients are prevalent nutrition-related problems in adolescent girls residing in low- and middle-income countries. The coexistence of both kinds of malnutrition typically impacts the most vulnerable people, such as women of reproductive age, and it has a detrimental impact on maternal and child health. Besides, malnutrition and inequality form a vicious cycle that is hard to break without all-encompassing solutions that address every stage of the life cycle. Therefore, this study aimed to assess the presence of socioeconomic inequality in the co-occurrence of anemia and stunting and its contributors in sub-Saharan African countries. Methods A total of 39,712 weighted adolescent girl samples from DHS data SSA countries were included in the study. Erreygers normalized concentration index and its concentration curve were used to assess socioeconomic-related inequality in the co-occurrence of anemia and stunting. Decomposition analysis was performed to identify factors contributing to socioeconomic-related inequality. Results The weighted Erreygers normalized concentration index for co-occurrence of anemia and stunting was − 0.046 with Standard error = 0.0043 (P value