Perioperative medicine & outcomes

Postoperative outcomes among Northern versus Southern Ontario patients undergoing common intermediate- to high-risk elective surgeries: a population-based cohort study

Can J AnaesthPublished Retrospective population-based cohort study

Main findingResult — go to the resultAdjusted odds ratio 1.04 95% CI 0.85–1.27

Authors' conclusion

Northern Ontario residency was not associated with increased odds of mortality after intermediate- to high-risk elective noncardiac surgery. Overall, we found no clinically meaningful differences in postoperative outcomes between patients from Northern and Southern Ontario.

Study context

Population
Adults undergoing selected elective intermediate- to high-risk noncardiac surgeries in Ontario, Canada, 2009–2022
Participants
562,115 adults
Exposure
Northern vs Southern Ontario residence
  • Northern Ontarion = 41,191
Outcome
Mortality following surgery
Follow-up
30 days
Methodological detailslinked administrative health care data
  • Linked administrative health care data

Main finding

As reported in the abstract

Adjusted odds ratio

1.04

95% CI 0.85–1.27

Northern Ontario vs Southern Ontario
aOR 1.04 (95% CI 0.85–1.27)

Observational data: associations, not effects.

Secondary outcomes

OutcomeAdjusted ratio of mean (95% CI)
Health system costs · 30 days0.92 (0.89–0.96)
Health system costs · 365 days0.93 (0.90–0.96)
Hospital LOS1.06 (1.01–1.11)

Days alive at home and readmission

Not statistically different between the two groups

Original publication

Postoperative outcomes among Northern versus Southern Ontario patients undergoing common intermediate- to high-risk elective surgeries: a population-based cohort study. Can J Anaesth. Published 4 November 2024. doi:10.1007/s12630-024-02860-9

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