ALB and heart failure: Main patients’ characteristics are described at Table 1, presenting various background patients’ data that are potentially associated with their prognosis: Epidemiological data included age, gender and Norton score, anthropometric data included weight and BMI (Body Mass Index), relevant background morbidities included chronic diseases like heart failure, diabetes and malignancy, relevant laboratory values (commonly acting as confounders) were also included: Kidney function tests, albumin and hemoglobin concentration.