ALB and chronic kidney disease: CKD was defined as follow: an eGFR <60 mL/min/1.73 m2 in a time period ≥ of three months or the presence of renal damage, with or without reduced eGFR, if the urine albumin-creatinine ratio (UACR) was ≥30 mg/g, also in a time period ≥ of three months.