Hypothyroidism in Children with Chronic Kidney Disease Attending a Tertiary Care Center.

Primary hypothyroidism is observed in adult patients with chronic kidney disease (CKD) though described scantily in the pediatric population. The primary objective of this study was to detect the prevalence of hypothyroidism in children (1-18 years) with CKD as assessed by thyroid profile. This cross-sectional study was conducted in the department of pediatrics of a tertiary care teaching hospital between January 2016 and January 2017. Clinical examination and biochemical investigations were performed for children with CKD aged 1 -18 years. Sixty-five children (51 boys, 43 CKD Stages 1-3) with a mean [standard deviation (SD)] age of 7.9 (3.2) years were enrolled. Overall, 17 (26.2%) had thyroid dysfunction; nine (13.8%) had subclinical hypothyroidism, three (4.6%) overt hypothyroidism, and five (7.7%) had isolated low T3 levels. The prevalence of hypothyroidism increased from 20.9% in CKD Stages 1-3 to 40.9% in Stages 4-5 of CKD; P = 0.09. The mean (SD) height SD scores were lower in those with hypothyroidism than with normal thyroid function [-1.02 (1.69) and -1.89 (1.12), P = 0.003, respectively], lowest at -2.79 (0.65) in overt hypothyroidism. A significant proportion of children with CKD manifest with hypothyroidism who have more profound growth failure. It may be prudent to screen CKD patients for thyroid dysfunction.