Abstract
The prevalence of subclinical thyroid diseases are estimated to be between 5 and 10 %. The diagnosis must always be confirmed through repeated determination of thyroid hormone levels, as spontaneous normalisation of thyroid hormone levels occurs in up to 40 % of patients with subclinical hypothyroidism.
Patients with both subclinical hypothyroidism and hyperthyroidism have increased cardiovascular morbidity and mortality. It is important to confirm the diagnosis of subclinical thyroid disease, uncover the cause, and treat patients with optimal TSH levels according to their age and associated comorbidities.