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Impact of body mass index on thyroid functions in Indian children
Author(s) -
Marwaha Raman K.,
Tandon Nikhil,
Garg M. K.,
Ganie Mohd Ashraf,
Narang A.,
Mehan Neena,
Bhadra Kuntal
Publication year - 2013
Publication title -
clinical endocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 147
eISSN - 1365-2265
pISSN - 0300-0664
DOI - 10.1111/cen.12148
Subject(s) - euthyroid , overweight , medicine , body mass index , subclinical infection , anthropometry , thyroid function , endocrinology , population , thyroid , obesity , thyroid function tests , pediatrics , environmental health
Objective There is controversy about the relation of thyroid functions and body mass index. The present study was aimed to assess the relationship between thyroid function and body mass index in Indian school children. Design Population survey. Patients Data were collected from 25 schools in 19 cities across five different geographical zones of India. Children, who consented, were evaluated for anthropometry and blood tests. Children were categorized as overweight and obese based on standard BMI criteria. Measurements Serum samples were analysed for free T3, free T4, TSH and anti‐ TPO antibodies. Results A total of 13 691 children in the age group of 5–18 years formed the study population. The mean age and mean BMI were 11·9 ± 3·0 years and 18·48 ± 3·89 kg/m 2 respectively. Among these, 2119 (15·5%) children were overweight and 536 (3·9%) were obese. Subclinical hypothyroidism was present in 943 (6·9%) children. FT 3 and TSH levels increased and FT 4 levels decreased with increasing BMI in euthyroid boys and girls. Prevalence of SCH was significantly higher in obese/overweight children (9·0%, vs 6·5%; P = 0·034) as compared with normal BMI children. Conclusions Serum FT 3 and TSH were positively while FT 4 was negatively associated with BMI in apparently healthy euthyroid children.