Implementation of a Structured Perioperative Checklist-Based Standardization Process and Early Postoperative Outcomes After Bariatric Surgery: A Single-Center Retrospective Pre–Post Cohort Study

Background/Objectives: Structured perioperative checklists may standardize bariatric surgical care, but their association with early clinical outcomes remains uncertain. This study compared 30-day postoperative outcomes before and after implementation of a structured perioperative checklist and characterized complications by type and Clavien–Dindo severity.