Perioperative medicine & outcomes

Preoperative fasting status and retained gastric contents in patients undergoing endoscopy who are using glucagon-like peptide type 1 receptor agonists: a multicentre retrospective study

Can J AnaesthPublished Retrospective cohort study

Main finding · RGCResult — go to the resultAdjusted odds ratio 0.33 95% CI 0.13–0.81

Authors' conclusion

Patients with an active prescription for GLP-1 RA had lower odds of RGC during EGD after more than 15 hr fasting of solids.

Study context

Population
Patients actively taking or recently discontinued (within 90 days) a GLP-1 RA undergoing elective esophagogastroduodenoscopy (EGD) at five Henry Ford Health System hospitals, January 2018–December 2023
Participants
337 participants · 5 hospitals
Exposure
Solid fasting >15 hr vs ≤15 hr
Outcome
Presence of RGC (any small, moderate, or large amount of food or gastric material reported by the endoscopist)
Methodological detailsmulticentre, multivariable logistic regression
  • Multicentre
  • Multivariable logistic regression

Main finding

RGC

Adjusted odds ratio

0.33

95% CI 0.13–0.81

P = 0.02

>15 hr vs ≤15 hr
aOR 0.33 (95% CI 0.13–0.81); P = 0.02

As reported in the abstract

Overall prevalence of retained gastric contents (RGC)
8.4%

Observational data: associations, not effects.

Further findings

GLP-1 RA suspension <7 days before procedure

aOR (95% CI)P value
Suspension <7 days5.23 (0.67–39.38)P = 0.12

Liquid fasting duration, diabetes, duration of GLP-1 RA use

Not significantly associated with RGC

Original publication

Preoperative fasting status and retained gastric contents in patients undergoing endoscopy who are using glucagon-like peptide type 1 receptor agonists: a multicentre retrospective study. Can J Anaesth. Published 19 August 2026. doi:10.1007/s12630-026-03187-3

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