Associations of dietary diversity with anaemia and iron status among 5- to 12-year-old schoolchildren in South Africa

Abstract

AbstractObjective:To examine the associations of dietary diversity with anaemia and iron status among primary school-aged children in South Africa.Design:An analysis was conducted with pooled individual data from the baseline surveys from three previously conducted independent intervention studies. Two different dietary diversity scores (DDS) were calculated based on data from 1-day (1-d) and 3-day (3-d) dietary recall periods, respectively. Logistic regression analysis was performed to examine the associations of dietary diversity with anaemia and iron status.Setting:KwaZulu-Natal and North West provinces, South Africa.Participants:Children (n 578) 5- to 12-year-old.Results:A DDS ≤ 4 was associated with higher odds of being anaemic (1-d P = 0·001; 3-d P = 0·006) and being iron deficient (ID) (3-d P < 0·001). For both recall periods, consumption of ‘vegetables and fruits other than vitamin A-rich’ and ‘animal-source foods (ASF)’ was associated with lower odds of being anaemic (both P = 0·002), and ‘organ meats’ with lower odds of being ID (1-d P = 0·045; 3-d P < 0·001). Consumption of ‘meat, chicken and fish’ was associated with lower odds of being anaemic (P = 0·045), and ‘vegetables and fruits other than vitamin A-rich’, ‘legumes, nuts and seeds’ and ‘ASF’ with lower odds of being ID for the 3-d recall period only (P = 0·038, P = 0·020 and P = 0·003, respectively).Conclusion:In order to improve anaemia and iron status among primary school-aged children, dietary diversification, with emphasis on consumption of vegetables, fruits and ASF (including organ meats), should be promoted.