Fig. 2.
Relationship between acute kidney injury (AKI) incidence and intraoperative hypotension (IOH), stratified by preoperative risk quartile. Quartiles with asterisks indicate statistically significant within-quartile differences among mean arterial pressure (MAP) ranges (P < 0.05). (A) and (B) represent compare absolute IOH ranges for each quartile in the derivation and validation cohorts, respectively; (C) and (D) compare relative IOH ranges for each quartile in the derivation and validation cohorts, respectively.