AlQahtani A, Alakkas Z, Althobaiti F, et al. - Researchers performed this retrospective cohort observational study to examine the prevalence of thyroid hormone abnormality among patients in the cardiac care unit (CCU) patients and its relation to admission diagnosis, clinical, biochemical data, and hospital-related outcomes. This investigation was carried out in the Cardiology Department at King Abdul Aziz Specialist Hospital in Taif City, Saudi Arabia. In total, 374 patients with a mean age of 62.7+14.7 years old were involved. Based on the admission diagnosis, ischemic changes were noted in 70.6% of the patients. Based on the thyroid function test at admission, euthyroidism was noted in 57.8% of the patients. Among patients admitted to the CCU, thyroid dysfunction is common. Non-significant positive associations when adjusting for potential confounders between TSH and hospitalization length, tertiary center referral, 30-day readmission, and in-hospital mortality.