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Assessment of iodine deficiency in Kottayam district, Kerala State: a pilot study.

Iodine is one of the essential micro-elements required for normal human growth and development. Iodine Deficiency Disorders (IDD) are an important public health problem in India. There has been no data on the prevalence of IDD from the Kottayam district, India and hence, the present pilot study was conducted in the year 1999 to assess whether iodine deficiency existed in the district or not and to estimate the iodine content of salt consumed by the population. A total of 1872 children in the age group of 6-12 years were included in the study and were clinically examined. On the spot urine samples were collected from 251 children. A total of 420 salt samples were collected randomly from the families of the children. The total goitre prevalence was found to be 7.05% in the subjects studied. It was found that the percentage of children with urinary iodine excretions of < 2, 2- < 5, 5-9 and 10 microg/dL and above were 6.4%, 6.0%, 20.7%, and 66.9%, respectively. Assessment of the iodine content of salt by the iodometric titration method revealed that 60.6% of the children were consuming salt with an iodine content of 15 p.p.m. and more, which was the stipulated level of salt iodisation. The findings of the present study indicated that the population is in a transitional phase from iodine deficient, as revealed by total goitre rate, to iodine sufficient nutriture, as revealed by the median urinary iodine excretion level of 17.5 microg/dL.