ALB and acute respiratory distress syndrome: In addition, the ROC also showed the clinical significance of albumin and APACHE II score in predicting the ICU mortality of ARDS patients (Albumin: AUC 0.694, 95% CI [0.599–0.788], P = 0.000; APACHE II: AUC 0.617, 95% CI [0.517–0.718], P = 0.028).