Effect of ordering thyroid-stimulating hormone levels on subsequent clinical management of internal medicine in-patients admitted with delirium

Background: Thyroid-stimulating hormone (TSH) is commonly ordered to investigate delirium. Previous studies have recommended against the routine testing of thyroid function in in-patients due to low clinical yield and excess use of resources. This has not been investigated in in-patients admitted for delirium specifically. We aimed to investigate the clinical yield of thyroid function testing in in-patients admitted for delirium.