ALB and chronic kidney disease: CKD is an irreversible, progressive disease characterized by persistent reduction in estimated glomerular filtration rate (eGFR) below 60 mL/min/1.73 m2, and/or abnormal urinary albumin-to-creatinine ratio (ACR, >30 mg/g) and/or overt proteinuria (>500 mg) lasting more than three months [10,11].