ALB and acute respiratory distress syndrome: In the multivariate analysis, after the adjusting with lymphocyte, PLT, Albumin, Urea, Creatinine, LDH, PT, APTT, D-dimer, CRP, and Procalcitonin, patients with GI symptoms independently associated with non-invasive mechanical ventilation (HR 3.1, 95%CI 1.8–5.4, p < 0.001), tracheal intubation (HR 2.4, 95%CI 1.1–5.5, p = 0.037) and ARDS (HR 2.8, 95%CI 1.7–4.6, p < 0.001).