Impact of Discontinuing GLP-1 Receptor Agonists for Two Weeks Prior to Upper Endoscopy on the Risk of Gastric Retention

Inclusion Criteria: * Undergoing elective upper endoscopy * Complete clinical information available, including endoscopy report, age, sex, BMI, history of diabetes, prior gastric surgery, and gastrointestinal symptom Exclusion Criteria: * Presence of upper gastrointestinal malignancy or obstruction * History of gastric surgery (including ESD, gastrectomy, gastric bypass, etc.) * Emergency endoscopy or non-elective procedures * Missing key clinical information