Wu J.-Y.SZU-CHUN HSUSHIH-CHI KUCHAO-CHI HOCHONG-JEN YUPAN-CHYR YANG2020-07-212020-07-2120081364-8535https://www.scopus.com/inward/record.uri?eid=2-s2.0-44449109066&doi=10.1186%2fcc6895&partnerID=40&md5=5c7ed2b139921cbb61c5cce9f71e8370https://scholars.lib.ntu.edu.tw/handle/123456789/510441Introduction: Adrenal insufficiency is common in critically ill patients and affects their prognosis, but little is known about how adrenal function changes during prolonged critical illness. This study was conducted to investigate dynamic changes in cortisol levels in patients with critical illness who do not improve after treatment. Methods: This observational cohort study was performed in the intensive care units of a university hospital. We studied acutely ill patients with initial cortisol level above 34 μg/dl, but who did not improve after treatment and in whom follow-up cortisol levels were determined during critical illness. All clinical information and outcomes were recorded. Results: Fifty-seven patients were included. Ten patients had follow-up cortisol levels above 34 μg/dl, 32 patients had levels between 34 and 15 μg/dl, and 15 patients had levels under 15 μg/dl. Outcomes did not differ significantly among the three groups with different follow-up cortisol levels. In Cox regression analysis, those patients who survived to hospital discharge with second cortisol levels under 15 μg/dl had a longer hospital length of stay (odds ratio = 14.8, 95% confidence interval = 2.4 to 90.0; P = 0.004). Conclusion: The majority of acutelyill patients who remained in a critical condition had decreased serum cortisol levels. Depressed cortisol levels at follow up may lead to worse clinical outcomes. We propose that repeated adrenal function testing be conducted in patients with prolonged critical illness. ? 2008 Wu et al.; licensee BioMed Central Ltd.[SDGs]SDG3hydrocortisone; hydrocortisone; acute disease; adrenal insufficiency; adult; aged; article; cohort analysis; confidence interval; controlled study; critical illness; disease duration; endocrine function test; female; human; hydrocortisone blood level; intensive care unit; length of stay; major clinical study; male; observational study; outcome assessment; priority journal; prognosis; proportional hazards model; risk assessment; survival; treatment failure; university hospital; adrenal insufficiency; artificial ventilation; blood; length of stay; middle aged; mortality; regression analysis; statistics; Adrenal Insufficiency; Aged; Aged, 80 and over; Cohort Studies; Critical Illness; Female; Humans; Hydrocortisone; Intensive Care Units; Length of Stay; Male; Middle Aged; Regression Analysis; Respiration, Artificialjournal article10.1186/cc6895184666052-s2.0-44449109066