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Risk of Thromboembolic Events and Associated Healthcare Costs in Patients with Inflammatory Bowel Disease
Juliana Setyawan1, Fan Mu2, Miriam L Zichlin3
1Arena Pharmaceuticals, Inc., San Diego, CA, USA.
Introduction:
Inflammatory bowel disease (IBD) is associated with greater risk of thromboembolic events (TEs) due to the link between systemic inflammation and hypercoagulability. This study assessed the rates of TEs among patients with IBD versus patients without immune-mediated disease (IMD) and the cost of TEs among patients with IBD in the United States.
Methods:
This study used the IBM MarketScan® Commercial and Medicare Supplemental Databases (2014-2018). To assess the incremental rates of TEs (deep vein thrombosis [DVT], pulmonary embolism [PE], ischemic stroke [IS], myocardial infarction [MI]), patients with IBD were matched to patients without IMD. Unadjusted and adjusted incidence rate ratios (IRRs) of TEs were used to compare cohorts. To assess the cost of TEs, patients with IBD with TEs were matched to patients with IBD without TEs. Costs were assessed 30 days and 1 year post index date.
Results:
There were 34,687 matched pairs included in the rates of TE analyses. Compared to patients without IMD, patients with IBD had greater rates of DVT (adjusted IRR [95% confidence interval] 2.44 [2.00, 2.99]; p < 0.01) and PE (1.90 [1.42, 2.54]; p < 0.01). Increased rates were not observed for IS and MI. There were 1885 matched pairs included in the cost of TE analyses. Patients with IBD with TEs incurred greater healthcare costs over 30 days and 1 year versus patients without TEs (adjusted total cost difference: 30 days $20,784; 1 year $44,630; p < 0.01 for both).
Conclusions:
Patients with IBD experienced greater rates of DVT and PE compared to patients without IMD; this elevated risk was associated with a substantial economic burden.
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