Optimal iodine status among women of reproductive age at national level may mask significant sub-national differentials – evidence from the first National Iodine and Salt Intake Survey, 2015, India

Abstract Number Theme Presentation Type Cover Approved
0279 Prevalence and risk factors for micronutrient status(deficiency, overload) Poster Not Approved


Abstract Content


To estimate adequacy of iodine intake among women of reproductive age (WRA) at national and sub-national (six geographical zones stratified by rural and urban areas) in India.


A national and sub-national representative multistage survey was undertaken with 42 clusters in each of the 12 strata. Twelve households were selected from each selected cluster. Survey tools included a household and a WRA questionnaire. Spot urine samples, to measure iodine, were collected from all consenting WRA from every alternate household.


An optimal median urinary iodine concentration (MUIC) of 158 µg/L was found among WRA at the national level. The MUIC varied however across rural (148.5 µg/L) and urban (167.9 µg/L) areas. The Central zone reported the lowest MUIC (128.6 µg/L) and the North zone reported the highest (204.0 µg/L). The MUIC varied by category of the woman’s household salt iodine content; 112.4 µg/L for non-iodised salt, 123.4 µg/L for inadequately iodised salt and 168.4 µg/L for adequately iodised salt. Women from more deprived households (based on the Multidimensional Poverty Index score) had lower MUIC (144.0 µg/L) as compared to non-deprived household (162.6 µg/L).The national MUIC amongst pregnant women was 124 µg/l (however only 148 pregnant women were included in the survey).


This first report of optimal iodine status amongst WRA in India masks significant differentials at sub-national level. The strategy for elimination of iodine deficiency should develop interventions around observed sub-national differentials to ensure sustained optimal iodine status across all population groups.

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