GSTM1 and kidney disorder: First, we could not obtain information from the NHI database about the patients’ body height, body weight, personal habits (physical activity, lifestyle, smoking, and alcohol consumption), nutritional-inflammation status, causes of kidney disease, and laboratory data (creatinine, eGFR, cystatin C, Ca, P, iPTH, Hb, HbA1c) in the NHIRD.