PLG and chronic kidney disease: Compared with CKD stage1, the levels of urinary angiostatin were significantly higher in CKD stage≥3(CKD stage3: 182.68(70.38, 466.12) versus (vs) CKD stage1: 82.15(34.80, 147.28), P < 0.01; CKD stage4: 275.81(211.08,521.24) vs CKD stage1: 82.15(34.80, 147.28), P < 0.001)).