Cardiac surgery timing showed no clear mortality difference
An observational synthesis found no statistically significant mortality difference, alongside a modest association between morning surgery and new atrial fibrillation.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Morning and afternoon elective cardiac surgery did not differ significantly in deaths during hospitalization. Morning surgery was associated with higher odds of new atrial fibrillation, while most other outcomes showed no significant differences. Because scheduling was observed rather than randomly assigned, these findings do not establish that changing operation times would change outcomes.
The abstract does not explain adjustment for patient or procedure differences. Its observational evidence limits causal interpretation of the timing associations.
What researchers found
Death during hospitalization
Morning versus afternoon: 1.09 times the odds of in-hospital death, a relative comparison rather than an absolute probability increase. The difference was statistically nonsignificant.
New postoperative atrial fibrillation
Morning versus afternoon: 1.11 times the odds of new atrial fibrillation after surgery, not an absolute probability increase. Exact follow-up length was unspecified.
Interpreting the mortality result
The mortality confidence interval spans estimates on either side of no difference. That leaves uncertainty about a small association and does not demonstrate that morning and afternoon surgery have equivalent safety.
Other postoperative outcomes
Most other complications and recovery measures showed no clear timing-related difference. The atrial-fibrillation association concerned a separate secondary outcome; it does not establish a broader advantage for either time of day.
The original publication
The Effects of Daytime Variation on Short-Term Outcomes of Cardiac Surgical Patients: A PRISMA-Compliant Systemic Review and Meta-Analysis.
Yao YT, Huang S, Chao M et al.
J Cardiothorac Vasc Anesth · 2026
- PubMed ID
- 41412842
- Record checked
AI-assisted research and writing. This explains one selected publication; it is not a complete review of everything known. Our approach.
One more question, understood.
Keep track of the research you’ve explored.