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No Weekday Effect in Bariatric Surgery-a Retrospective Cohort Study
Martin L Skogar1, Erik Stenberg2, Magnus Sundbom3
1Department of Surgical Sciences, Uppsala University, 751 85, Uppsala, Sweden. martin.skogar@surgsci.uu.se.
Obesity Surgery
|April 5, 2022
Summary
Weekday of surgery does not significantly impact 30-day complication risks for bariatric procedures like Roux-en-Y gastric bypass and sleeve gastrectomy. Bariatric surgery is safe to perform on any weekday.
Area of Science:
- Bariatric Surgery Outcomes
- Surgical Safety Research
- Health Services Research
Background:
- Major abdominal surgeries performed late in the week are linked to higher complication rates.
- Investigating the impact of surgery timing on patient outcomes is crucial for improving surgical care.
Purpose of the Study:
- To determine if the day of the week affects 30-day complication risks after primary Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG).
Main Methods:
- Retrospective cohort study of 49,349 patients undergoing primary laparoscopic RYGB or SG (2010-2017).
- Data sourced from the Scandinavian Obesity Surgery Registry (SOReg).
- Multivariate logistic regression adjusted for case-mix and operating center.
Main Results:
- Overall 30-day complication rate was 7.2%, with severe complications at 2.9%.
- No significant increase in overall or severe complications was found based on the weekday of surgery after adjustments.
- A lower readmission rate was observed for patients operated on Tuesdays.
Conclusions:
- Bariatric surgery, including RYGB and SG, can be safely performed on any weekday.
- Weekday of surgery is not a significant risk factor for short-term complications in bariatric procedures.

