Cardiothoracic & vascular anesthesia

Association Between the Use of Midazolam During Cardiac Anesthesia and the Incidence of Postoperative Delirium: A Retrospective Cohort Study Using a Nationwide Database

J Cardiothorac Vasc AnesthPublished Retrospective cohort study

Main finding · Postoperative deliriumResult — go to the resultOdds ratio 0.95 95% CI 0.87–1.03

Authors' conclusion

Intraoperative administration of midazolam may not induce postoperative delirium in patients undergoing cardiac surgery.

Study context

Population
Patients aged ≥65 years undergoing cardiovascular surgery (excluding transcatheter, multiple surgeries per admission, preoperative delirium), Japanese Diagnosis Procedure Combination database, April 2015–October 2019analysed
Participants
16,185 patients
Exposure
Intraoperative midazolam vs no midazolam
  • Midazolamn = 10,633
Outcome
Incidence of postoperative delirium
Methodological detailsnationwide database, stabilized inverse probability of treatment weighting, propensity score, Sensitivity analyses supported these results
  • Nationwide database
  • Stabilized inverse probability of treatment weighting
  • Propensity score
  • Sensitivity analyses supported these results

Main finding

Postoperative delirium

Odds ratio

0.95

95% CI 0.87–1.03

P = 0.21

Midazolam vs No midazolam
OR 0.95 (95% CI 0.87–1.03); P = 0.21

As reported in the abstract

Observational data: associations, not effects.

Secondary outcomes

OutcomeOR (95% CI)P value
Hospital mortality0.92 (0.76–1.11)P = 0.39
PONV0.92 (0.85–0.99)P = 0.03

ICU LOS

P < 0.001

Hospital LOS

P < 0.001

Original publication

Association Between the Use of Midazolam During Cardiac Anesthesia and the Incidence of Postoperative Delirium: A Retrospective Cohort Study Using a Nationwide Database. J Cardiothorac Vasc Anesth. Published 27 August 2023. doi:10.1053/j.jvca.2023.08.147

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