Status and Correlates of Micronutrient Deficiencies in Slum and Non-slum Areas of India's Four Metropolitan Cities: Investigation from CNNS

Micronutrient malnutrition is an emerging public health concern globally. It affects people of all ages and socioeconomic groups; however, the most marginalized are the worst affected. Using data from the Comprehensive National Nutrition Survey 2016-18, we determined the magnitude of deficiencies (of iron, zinc, vitamin A, folate, vitamins B and D) among children and adolescents (1-19 years of age) living in four metropolitan cities of India. Separate estimates by residence in slum and non-slum areas were derived for pre-school and school-aged children and adolescents. The association between each micronutrient deficiency (MND) and place of residence, exposure to progarmmes, socioeconomic, and demographic variables was assessed using Poisson regression. Of all children in the sample, at least seven out of 10 children suffered from some kind of MND. Anaemia was prevalent among all children but at different levels among various age-groups. Folate deficiency was highly prevalent among children in slums whereas deficiencies of vitamin D and zinc were more prevalent among non-slum children. Dietary diversity reduced the risk of deficiencies- Vitamin A in children 1-9, anaemea in 1-4 age, folate in children 5-19. Exposure to government-sponsored nutrition programmes such as mid-day meal, and IFA did not show any significant effect on reducing deficiencies. However, adolescents exposed to IFA supplementation programmes were less likely to be folate deficient. Overall, government schemes that have been running for decades, and intensified lately, are yet to show noticeable positive effect on micronutrient status of children. Nevertheless, differential estimates by slum/non-slum residence and by age-groups calls for devising different strategies for different sub-groups to address the issue of MNDs among children and adolescents. Nutrition education not only for slum residents but also for those from non-slum areas is an urgent need to check the spread of MNDs.