GSTM1 and chronic kidney disease: These were CKD stage, Hb, urea, TCO2, HDL-C, etiology, CVDs, ACEI/ARB, other antihypertensive drugs, iron supplements, sodium bicarbonate, ketoacid tablets, and Chinese patent medicines (p < 0.05) (important laboratory data are highlighted in Table 1, and details can be found in Supplementary Table S1).