Perioperative medicine & outcomes
Effect of time of day on outcomes in elective surgery: a systematic review
Pooled result · Mortality, evening/night-time vs daytimeResult — go to the resultOdds ratio 1.35 to 3.98 95% CI 1.16-1.56 to 1.54-10.30Authors' conclusion
We found that evening/night-time elective surgery is associated with a higher risk of mortality compared with daytime surgery.
Study context
- Population
- Patients undergoing elective (not urgent or emergency) surgery19 retrospective cohorts, 1 prospective cohort, 1 RCT
- Participants
- 798,914 patients
- Comparison
- Evening/night-time vs Daytime
- Outcome
- Mortality, morbidity and other clinical outcomes
Methodological detailsrisk of bias screening, Most studies low quality of evidence (retrospective, not all corrected for patient characteristics); heterogeneous time slots and outcomes
- Risk of bias screening
- Most studies low quality of evidence (retrospective, not all corrected for patient characteristics); heterogeneous time slots and outcomes
Pooled result
Mortality, evening/night-time vs daytime
Odds ratio
1.35 to 3.98
95% CI 1.16-1.56 to 1.54-10.30
As reported in the abstract
Further pooled results
Outcomes, morning vs afternoon surgery
- No differences (four studies, n = 3277)
Original publication
Effect of time of day on outcomes in elective surgery: a systematic review. Anaesthesia. Published 7 August 2024. doi:10.
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