Evaluation of Respiratory Functions in Subclinical and Clinical Hypothyroidism

Abstract

Aim: Subclinical hypothyroidism reflects the earliest stage of thyroid dysfunction with subjects having normal or decreased fT4, normal fT3 and decreased thyroid stimulating hormone levels. Thyroid hormones have effects on the respiratory system functions. It is well known that thyroid hormones have effects on the respiratory system functions however there are few studies concerning the effect of subclinical hypothyroidism on the respiratory system. We aimed to investigate the respiratory functions in patients diagnosed with subclinical and clinical hypothyroidism.