Figure 2.

Relative risk plot showing the relationship between early postoperative mean blood pressure and postoperative acute kidney injury (AKI) of overall patients (A). When stratified by the baseline kidney function, a steeper relative risk gradient is observed in patients with lower baseline kidney function (cystatin C GFR ≤85 mL/min/1.73 m²) than patients with higher baseline kidney function (cystatin C GFR >85 mL/min/1.73 m², (B). Estimates are adjusted for independent confounders from multivariable generalized logistic regression model. The solid lines and translucent band depict relative risk and 95% confidence intervals of those estimates. AKI – acute kidney injury; GFR – glomerular filtration ratio.