“…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 ].…”