Organ support & nutrition

Incidence and outcomes of acute kidney injury (AKI) in postoperative patients admitted to ICU using full KDIGO criteria – a cohort study

J Clin AnesthPublished Retrospective cohort study

Authors' conclusion

AKI based on full KDIGO criteria is very common in postoperative ICU patients and it is associated with stepwise increase in 28-days mortality.

Study context

Population
Adult postoperative ICU patients, tertiary university hospital, 2016–2018
Participants
6,261 patients
Exposure
AKI stages 1–3
Outcome
All-cause mortality by AKI stage (complete KDIGO criteria)
Follow-up
28 days
Methodological detailssingle-centre, tertiary university hospital, eight anaesthesiological/surgical ICUs
  • Single-centre
  • Tertiary university hospital
  • Eight anaesthesiological/surgical ICUs

Main finding

As reported in the abstract

28-day mortality by AKI stage (multivariate)
Adjusted
Odds ratio (95% CI)P value
AKI 2°
2.81(1.55–5.24)
P < 0.001
AKI 3°
11.37(5.91–22.55)
P < 0.001
Overall 28-day mortality
3% (n = 205)
AKI incidence
3497 (55.9%)

Observational data: associations, not effects.

Further findings

Other predictors of 28-day mortality (multivariate)

OR (95% CI)P value
Age1.02 (1.01–1.04)P < 0.001
NYHA IV2.23 (1.03–4.43)P = 0.042
Surgical reintervention within 48 h2.92 (1.76–4.72)P = 0.001
Urgent surgery1.78 (1.15–2.71)P = 0.01
Emergency surgery2.63 (1.58–4.31)P = 0.001
OutcomeOR (95% CI)P value
Other predictors of 28-day mortality (multivariate) · 28 daysVascular surgery vs Cardiac surgery2.01 (1.06–3.98)P = 0.033
Other predictors of 28-day mortality (multivariate) · 28 daysOrthopedic and trauma surgery vs Cardiac surgery3.79 (1.98–7.09)P < 0.001

RRT

Patients receiving RRT
235 (4%)

Original publication

Incidence and outcomes of AKI in postoperative patients admitted to ICU using full KDIGO criteria – a cohort study. J Clin Anesth. Published 23 June 2023. doi:10.1016/j.jclinane.2023.111156

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