RENBP and chronic kidney disease: Compared to those in the reference group (Q5), participants in serum AG ratio groups Q1-Q4 had the following hazard ratios (HRs) for CKD development: Q1, 1.651 (95% CI, 1.406–1.938; P<0.001); Q2, 1.453 (95% CI, 1.235–1.708; P<0.001); Q3, 1.419 (95% CI, 1.203–1.675; P<0.001); Q4, 1.174 (95% CI, 0.998–1.381; P = 0.05).