ALB and pulmonary arterial hypertension: Abnormal ALB independently functioned as a risk variable for hospital mortality and 90-day mortality and was significantly associated with 90-day and 4-year survival curves in both total PPH and PPH without liver disorders (Tables 2–7 and Figures 1, 3), suggesting that ALB may serve as an independent prognostic marker for PPH, irrespective of the presence or absence of liver disease in PPH patients.