COVID-19(8) coronavirus disease(7) clinical(6) disease(6) Patient(5) Mortality(5) Thyroid(5) dysfunction(5) thyroid hormone(5) outcome(4) Coronavirus disease 2019(4) death(4) hazard ratio(4) Diabetes Mellitus(4) 95% confidence interval(4) analyzed(4) thyroid dysfunction(3) Prognosis(3) euthyroid(3) syndrome(3) South Korea(3) lowest(3) evaluated(3) COVID-19 patients(3) intensive care unit admission(3) COVID-19 patient(3) profile(3) triiodothyronine(3) thyrotoxicosis(3) thyroid stimulating hormone(3)