Perioperative medicine & outcomes

Cardiometabolic disease and obesity patterns differentially predict acute kidney injury after total joint replacement: a retrospective analysis

Br J AnaesthPublished Retrospective cohort study

Authors' conclusion

The current study suggests that the co-occurrence of metabolic conditions (diabetes mellitus, hypertension), with or without obesity, is a more important risk factor for acute kidney injury than individual comorbid diseases.

Study context

Population
Patients ≥18 years undergoing primary total knee or hip arthroplasty, US Multicenter Perioperative Outcomes Group hospitals, 2008–2019
Participants
81,639 patients
Exposure
Latent class/obesity interaction groups vs 'hypertension only'/non-obese
  • Hypertension onlyn = 37,223
  • Metabolic syndrome (MetS)n = 36,503
  • MetS+CVDn = 7,913
Outcome
Any postoperative AKI (modified KDIGO criteria)
Methodological detailsmulticentre, latent class analysis, mixed-effects logistic regression
  • Multicentre
  • Latent class analysis
  • Mixed-effects logistic regression

Main finding

As reported in the abstract

Odds of AKI by latent class/obesity group (adjusted)
Each group vs hypertension only/non-obeseOdds (fold increase) (95% CI)
Hypertension only/obese
1.7(1.5–2.0)
Each group vs hypertension only/non-obeseOdds ratio (95% CI)
MetS+CVD/obesehighest odds
3.1(2.6–3.7)
MetS+CVD/non-obese
odds (times) 2.2 (95% CI 1.8–2.7)
Model AUC
0.76

Observational data: associations, not effects.

Further findings

Acute kidney injury (AKI) incidence (overall)

Developed AKI
4007 (4.9%)

Characteristics of patients with AKI

More commonly older and non-Hispanic Black, with more significant comorbidity

Original publication

Cardiometabolic disease and obesity patterns differentially predict acute kidney injury after total joint replacement: a retrospective analysis. Br J Anaesth. Published 13 May 2023. doi:10.1016/j.bja.2023.04.001

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