Clinical Features, Treatments, and Outcomes in Acute Respiratory Distress Syndrome (ARDS-CTO)

The goal of this observational prospective cohort study is to explore the clinical characteristics, treatment strategies, and outcomes of adult patients with acute respiratory distress syndrome (ARDS) admitted to the medical intensive care unit of Asan Medical Center. The main questions it aims to answer are: * What are the clinical features, current practices, and prognosis of ARDS patients in Korea? * How do different mechanical ventilation settings affect ARDS patient outcomes? Participants will: * Be screened at medical ICU admission for eligibility according to the Berlin definition of ARDS. * Have demographic, clinical, laboratory, and ventilator data collected from bedside monitoring devices and electronic health records during their ICU stay. * Complete a quality-of-life questionnaire (EQ-5D) at hospital discharge if they survive.