ThucNhi T Dang1, Jerry T Dang2, Muhammad Moolla3, Noah Switzer2, Karen Madsen4, Daniel W Birch2, Shahzeer Karmali2. 1. Division of Gastroenterology, Department of Medicine, University of Alberta Hospital, University of Alberta, 8440 112 Street NW, Edmonton, AB, T6G 2B7, Canada. thucnhi@ualberta.ca. 2. Department of Surgery, University of Alberta, Edmonton, Alberta, Canada. 3. Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada. 4. Division of Gastroenterology, Department of Medicine, University of Alberta Hospital, University of Alberta, 8440 112 Street NW, Edmonton, AB, T6G 2B7, Canada.
Abstract
BACKGROUND: Obesity is associated with disturbances in the gut microbiota which is a risk factor for Clostridium difficile infection (CDI). Bariatric surgery can induce substantive changes to the gut microbiota which may affect the risk of developing CDI. METHODS: The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program captures variables specific to bariatric surgery from 832 centers. Patients undergoing laparoscopic Roux-en-Y gastric bypass (LRYGB) or laparoscopic sleeve gastrectomy (LSG) in 2016 and 2017 were identified. Primary outcomes included the prevalence and predictors of CDI after bariatric surgery. A multivariable logistic regression model determined preoperative factors predictive of 30-day CDI. RESULTS: A total of 78,222 LRYGB and 222,968 LSG were included. The overall incidence of CDI was low with 0.13% developing CDI. Rates of CDI were two times higher after LRYGB compared to LSG (0.2 vs 0.1%, p < 0.001). Although CDI rates were low, CDI was associated with increased post-operative complications. Multivariable analysis identified chronic kidney disease (OR 2.37, 95%CI 1.09-5.15, p = 0.03) and history of venous thromboembolism (OR 2.06, 95%CI 1.29-3.29, p = 0.002) as being most predictive of developing CDI with more than a twofold increase in risk. Patients undergoing LRYGB had an increased risk of CDI compared to LSG (OR 1.65, 95%CI 1.31-2.09, p < 0.001). White race, female sex, and obstructive sleep apnea also increased risk of CDI. CONCLUSIONS: The incidence of CDI following bariatric surgery is relatively low with LRYGB having a higher risk than LSG. Furthermore, CDI is associated with significant adverse outcomes post-operatively but had no increased risk of mortality.
BACKGROUND: Obesity is associated with disturbances in the gut microbiota which is a risk factor for Clostridium difficile infection (CDI). Bariatric surgery can induce substantive changes to the gut microbiota which may affect the risk of developing CDI. METHODS: The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program captures variables specific to bariatric surgery from 832 centers. Patients undergoing laparoscopic Roux-en-Y gastric bypass (LRYGB) or laparoscopic sleeve gastrectomy (LSG) in 2016 and 2017 were identified. Primary outcomes included the prevalence and predictors of CDI after bariatric surgery. A multivariable logistic regression model determined preoperative factors predictive of 30-day CDI. RESULTS: A total of 78,222 LRYGB and 222,968 LSG were included. The overall incidence of CDI was low with 0.13% developing CDI. Rates of CDI were two times higher after LRYGB compared to LSG (0.2 vs 0.1%, p < 0.001). Although CDI rates were low, CDI was associated with increased post-operative complications. Multivariable analysis identified chronic kidney disease (OR 2.37, 95%CI 1.09-5.15, p = 0.03) and history of venous thromboembolism (OR 2.06, 95%CI 1.29-3.29, p = 0.002) as being most predictive of developing CDI with more than a twofold increase in risk. Patients undergoing LRYGB had an increased risk of CDI compared to LSG (OR 1.65, 95%CI 1.31-2.09, p < 0.001). White race, female sex, and obstructive sleep apnea also increased risk of CDI. CONCLUSIONS: The incidence of CDI following bariatric surgery is relatively low with LRYGB having a higher risk than LSG. Furthermore, CDI is associated with significant adverse outcomes post-operatively but had no increased risk of mortality.
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