Perioperative medicine & outcomes

Perioperative Mortality of the COVID-19 Recovered Patient Compared to a Matched Control: A Multicenter Retrospective Cohort Study

AnesthesiologyPublished Retrospective cohort study

Authors' conclusion

Patients with a positive test for COVID-19 before elective surgery early in the pandemic have an elevated risk of perioperative mortality and pulmonary complications but not acute kidney injury as compared to matched controls.

Study context

Population
Patients presenting for elective inpatient surgery at academic and community hospitals, April 2020 to April 2021matched cohort
Participants
4,951 vs 4,951
Exposure
COVID-19-exposed vs Controls
  • COVID-19-exposedn = 4,951
  • Controlsn = 4,951reference
Outcome
Hospital mortality
Follow-up
30 days
Methodological detailsmulticentre, matched cohort
  • Multicentre
  • Matched cohort

Main finding

As reported in the abstract

30-day mortality
COVID-19 exposure associated with increased 30-day mortality risk, aOR
1.63 (95% CI 1.38 to 1.91)

Observational data: associations, not effects.

Further findings

Pulmonary complications

AKI

Pulmonary complications — COVID-19 exposure associated with increased risk of pulmonary complications, aOR
1.60 (95% CI 1.36 to 1.88)
AKI — COVID-19 exposure not associated with increased risk of AKI, aOR
1.03 (95% CI 0.87 to 1.22)

Mortality and pulmonary complications by timing of positive test (subgroup)

Surgery within 2 weeks of infection associated with significantly increased risk of mortality and pulmonary complications; effect nonsignificant after 2 weeks

Original publication

Perioperative Mortality of the COVID-19 Recovered Patient Compared to a Matched Control: A Multicenter Retrospective Cohort Study. Anesthesiology. Published 16 October 2023. doi:10.1097/aln.0000000000004809

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