“…However, some other predictors that extend in-hospital stay were found in the previous studies, such as older age [10], present IDA [29,30], type 2 diabetes mellitus [9,31], chronic pulmonary disease [20,32], a number of present comorbidities [11,33], higher BMI [9], presence of edema on admission [19], hypoxia (<90%) on admission [32], poor NYHA functional class [24,34], hypoalbuminemia [15,24,34], hyponatremia [10,20], higher levels of uric acid [9], higher BUN [9,10], greater inferior vena cava diameter [10].…”