Prevalence and determinants of anemia among school going children in the state of Tamil Nadu, India: applications of two-level logistic regression model

Background: Anemia still remains as one of the major public health problems in India despite implementing preventive measures. The objective was to find the prevalence and determinants of anemia among school going children in Tamil Nadu. Methods: We used the data from the fourth round of district level household survey (DLHS-4) for Tamil Nadu pertaining to the year 2012-13. Our analysis included 23997 children. Descriptive statistics, Random intercept and empty models of two-level logistic regression analysis were used. Results: The overall prevalence of anemia was found to be 41.4% (95% CI: 40.77%-42.02%). We observed a district level variation on anemia (District level variance=0.1, p<0.001) and the intra class correlation coefficient was 0.0295. The prevalence of anemia was more in coastal districts as compared to non-coastal districts (43.85% vs. 40.18%, p<0.001). Variables that are found to have significant association with anemia on multilevel analysis were younger age (Adjusted odds ratio (AOR)=1.343, 95% CI: 1.270-1.420), female children (AOR=1.462, 95% CI: 1.387-1.541), more than eight family members in the household (AOR=1.120, 95% CI: 1.008-1.245), rural residence (AOR=1.103, 95% CI: 1.038-1.172) and lower standard of living (AOR=1.203, 95% CI: 1.084-1.334). Conclusions: Half of school going children were anemic in the state. Geospatial distribution of anemia varied significantly. Governments and regional health centres should take adequate measures to avert the consequences of anemia in school going children considering these factors.