Compared with healthy controls (n = 120), stage 5 CKD patients (n = 121) and PTX patients (n = 501) had lower hemoglobin (Hb), hematocrit (Hct), serum albumin (Alb), alanine amino transferase (ALT), aspartate amino transferase (AST), direct bilirubin (DBIL), and indirect bilirubin (IBIL) levels. Here, GSTM1 is linked to chronic kidney disease.