ALB and kidney disorder: Model 1: unadjusted model; Model 2: adjusted for sex, age, laboratory parameters (albumin, serum potassium, serum sodium, creatinine, WBC, RBC, platelet); Model 3: adjusted for sex, age, laboratory parameters (albumin, serum potassium, serum sodium, creatinine, WBC, RBC, platelet) and comorbidities (congestive heart failure, chronic pulmonary disease, sepsis, myocardial infarction, liver disease, cerebrovascular disease, diabetes, renal disease, hypertension, malignant cancer);