Cardiothoracic & vascular anesthesia

Risk factors, outcomes, and early prediction of cardiac surgery-associated acute kidney injury: a post hoc subgroup analysis of the Epidemiology of Surgery Associated Acute Kidney Injury study

Br J AnaesthPublished Post hoc subgroup analysis of the EPIS-AKI prospective study

Authors' conclusion

Overall, 25% of cardiac surgery patients developed cardiac surgery-associated acute kidney injury, and 33% of these patients experienced persistent cardiac surgery-associated acute kidney injury, which was associated with poor outcomes.

Study context

Population
Patients undergoing cardiac surgery in the Epidemiology of Surgery Associated Acute Kidney Injury (EPIS-AKI) study
Participants
3,101 cardiac surgery patients
Primary endpoint
CSA-AKI (AKI per KDIGO criteria) within 72 h after surgery; persistent CSA-AKI (lasting >48 h)
Follow-up
72 h after surgery
Methodological detailsmultivariable logistic regression
  • Multivariable logistic regression

Primary result

As reported in the abstract

CSA-AKI and persistent CSA-AKI

Cardiac surgery-associated acute kidney injury (CSA-AKI)

802

25.9%

Persistent CSA-AKI among CSA-AKI patients

279 of the 802

34.8%

Further findings

ICU and hospital mortality, persistent vs transient CSA-AKI

Higher ICU and hospital mortality with persistent vs transient CSA-AKI

Risk score for predicting persistent CSA-AKI (EPIS CSA-AKI risk score)

AUC
0.79 (95% CI 0.7355-0.8457)

Original publication

Risk factors, outcomes, and early prediction of cardiac surgery-associated acute kidney injury: a post hoc subgroup analysis of the Epidemiology of Surgery Associated Acute Kidney Injury study. Br J Anaesth. Published 9 October 2025. doi:10.1016/j.bja.2025.08.043

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