![]() We have recently reported that having RYGB surgery during the start-up period after summer vacation is associated with an increased risk of serious postoperative complications (Fall et al., in manuscript). The risk of severe postoperative complications after bariatric surgery is low, about 3% in Sweden. Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG) are the most commonly performed bariatric procedures, both resulting in long-term weight reduction and resolution of metabolic comorbidities for many patient. Whether the weekday of surgery has any influence on risk of complications after bariatric surgery, a rather technically demanding procedure performed in increasing numbers worldwide, has not yet been studied. ![]() Likewise, a systematic review and a retrospective study of various elective surgical procedures at English public hospitals found a higher risk of postoperative mortality for patients operated on Fridays and during weekends. In thoracic surgery, coronary artery bypass grafting (CABG) on Fridays has been associated with higher 30-day mortality when compared to Mondays. Surgery for gastrointestinal malignancies carried out in the later part of the week (Wednesday–Friday) has been associated with increased complication rates, e.g., gastrectomy for gastric cancer, and inferior long-term survival in esophageal, hepatobiliary, colorectal, and ovarian cancer. The influence of external factors such as the weekday of surgery on postoperative outcome is less studied. Which patient-related factors that affect the complication risk for a specific procedure is often well-known. Graphical AbstractĪll individuals undergoing surgery fear suffering a complication. The result of the present study supports the notion that bariatric surgery can be performed safely on all weekdays. After adjustment for case-mix and operating center, there was no significant increased risk of overall complications, severe complications, or readmission rates by weekday of surgery, except for a lower readmission rate in patients operated on Tuesdays. However, a large variation in severe complications was seen between centers, from 0.4 to 8.0%. The highest overall complication rate was seen in patients operated on Wednesdays and Thursdays (7.7%), while severe complications were most common on Wednesdays (3.3%). The 30-day mortality rate and readmission rate were 0.02% ( n = 12) and 7.6% ( n = 3726), respectively. The overall 30-day complication rate was 7.2% ( n = 3574), whereof 2.9% ( n = 1428) had a severe complication, i.e., requiring intervention in general anesthesia or more. In total, 49,349 patients were included in this study. Multivariate logistic regression adjusted for differences in case-mix and operating center by weekday of surgery. ![]() Prospectively collected data, extracted from the Scandinavian Obesity Surgery Registry (SOReg), of all patients who underwent primary laparoscopic RYGB or SG between 20 were included in this retrospective cohort study. ![]() The aim of this study was to explore whether the weekday of surgery affects the 30-day complication risks after primary Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG). Major abdominal surgery carried out in the later part of the week has been associated with increased complication rates.
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