KL and chronic kidney disease: The results indicated that the bacteria which enriched in the CKD group, CTLP group, and CKDP group (such as Allobaculum) were positively correlated with the levels of PTH, serum calcium, serum phosphate and SBP, negatively correlated with Klotho; bacteria that were enriched in the CTLP and CKDP group (such as Blautia) were positively correlated with PTH and serum calcium, and negatively related with Klotho.