Frequency of Subclinical Hypothyroidism in Old-age Population

Abstract

This study was conducted to determine the frequency of subclinical hypothyroidism (SCH) in the old age population (>60 years). A cross-sectional study was conducted from July 2019 to January 2020 at Jinnah Postgraduate Medical Centre, Karachi, Pakistan. Healthy subjects (having no active complaint) of either sex aged 60-80 years were included. Those already on thyroid replacement, preexisting thyroid diseases, prior radiation therapy, or having chronic kidney disease were excluded. A total of 133 participants, 79 males and 54 females, were selected with a mean age of 69.5 ± 6.4 years. There were 29 diabetics, 30 hypertensives, and 10 smokers. A total of 17 (12.8%) were found to have SCH. On stratification, gender, diabetes mellitus, and hypertension had a significant association with the presence of SCH. SCH is a modifiable risk factor, more in females, diabetics, hypertensives, and the old age population. These results highlight the need for screening for SCH in primary care settings, especially in old age.