Jeffrey D McCurdy1,2,3, M Ellen Kuenzig4, Glenys Smith5, Sarah Spruin5, Sanjay K Murthy1,2,3, Marc Carrier1,3,5, Geoffrey C Nguyen6,7, Eric I Benchimol4,8. 1. Department of Medicine, University of Ottawa, Ottawa, Canada. 2. Division of Gastroenterology, The Ottawa Hospital IBD Center, Ottawa, Canada. 3. The Ottawa Hospital Research Institute, Ottawa, Canada. 4. CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology Hepatology & Nutrition, Children's Hospital of Eastern Ontario, Ottawa, Canada; ¶ICES uOttawa, Ottawa, Canada. 5. Division of Hematology, The Ottawa Hospital, Ottawa, Canada. 6. Department of Medicine, University of Toronto, Toronto, Canada. 7. Mount Sinai Hospital Centre for Inflammatory Bowel Disease, Division of Gastroenterology, Toronto, Canada. 8. Department of Pediatrics and School of Epidemiology and Public Health, University of Ottawa, Canada.
Abstract
BACKGROUND: Inflammatory bowel disease (IBD) is associated with a high risk of venous thromboembolism (VTE) during hospitalization. It is unclear if this association persists after discharge. We aimed to assess the incidence of postdischarge VTE in IBD patients and to determine if IBD is associated with increased VTE risk. METHODS: We performed a population-based cohort study between 2002 and 2016 using Ontario health administrative data sets. Hospitalized (≥72 hours) adults with IBD were stratified into nonsurgical and surgical cohorts and matched on propensity score to non-IBD controls. Time to postdischarge VTE was assessed by Kaplan-Meier methods, and VTE risk was assessed by Cox proportional hazard models. RESULTS: A total of 81,900 IBD discharges (62,848 nonsurgical and 19,052 surgical) were matched to non-IBD controls. The cumulative incidence of VTE at 12 months after discharge was 2.3% for nonsurgical IBD patients and 1.6% for surgical IBD patients. The incidence increased in the nonsurgical IBD cohort by 4% per year (incidence rate ratio, 1.04; 95% CI, 1.02-1.05). In our propensity score-matched analysis, the risk of VTE at 1-month postdischarge was greater in nonsurgical IBD patients (hazard ratio [HR], 1.72; 95% CI, 1.51-1.96) and surgical patients with ulcerative colitis (HR, 1.68; 95% CI, 1.16-2.45) but not surgical patients with Crohn's disease. These trends persisted through 12 months. CONCLUSIONS: Nonsurgical IBD patients and surgical patients with ulcerative colitis are 1.7-fold more likely to develop postdischarge VTE than non-IBD patients. These findings support the need for increased vigilance and consideration of thromboprophylaxis in this population.
BACKGROUND:Inflammatory bowel disease (IBD) is associated with a high risk of venous thromboembolism (VTE) during hospitalization. It is unclear if this association persists after discharge. We aimed to assess the incidence of postdischarge VTE in IBDpatients and to determine if IBD is associated with increased VTE risk. METHODS: We performed a population-based cohort study between 2002 and 2016 using Ontario health administrative data sets. Hospitalized (≥72 hours) adults with IBD were stratified into nonsurgical and surgical cohorts and matched on propensity score to non-IBD controls. Time to postdischarge VTE was assessed by Kaplan-Meier methods, and VTE risk was assessed by Cox proportional hazard models. RESULTS: A total of 81,900 IBD discharges (62,848 nonsurgical and 19,052 surgical) were matched to non-IBD controls. The cumulative incidence of VTE at 12 months after discharge was 2.3% for nonsurgical IBDpatients and 1.6% for surgical IBDpatients. The incidence increased in the nonsurgical IBD cohort by 4% per year (incidence rate ratio, 1.04; 95% CI, 1.02-1.05). In our propensity score-matched analysis, the risk of VTE at 1-month postdischarge was greater in nonsurgical IBDpatients (hazard ratio [HR], 1.72; 95% CI, 1.51-1.96) and surgical patients with ulcerative colitis (HR, 1.68; 95% CI, 1.16-2.45) but not surgical patients with Crohn's disease. These trends persisted through 12 months. CONCLUSIONS: Nonsurgical IBDpatients and surgical patients with ulcerative colitis are 1.7-fold more likely to develop postdischarge VTE than non-IBDpatients. These findings support the need for increased vigilance and consideration of thromboprophylaxis in this population.
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