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Background Data from clinical trials suggest that biological drugs may improve the outcomes in Crohn’s disease (CD) by reducing the need for surgery or hospitalisation. However, data on the trends in biological drug use and outcomes in CD patients are scarce. The aim of this study is to evaluate the time-trends of the use of biological drugs and other treatments for CD, and its relationship with outcomes such as surgery and hospitalisation in Catalonia. Methods All patients with CD included in the Catalan Health Surveillance System (containing data on a population of more than 7.5 million) from 2011 to 2017 were identified. The exposures to different treatments for inflammatory bowel disease were retrieved from electronic invoicing records. Time trends for surgery and hospitalisation were described and tested for correlation with treatment using the statistical package R, version 3.4.3. Results Between 2011 and 2017, the use of salicylates, corticosteroids and immunosuppressive treatment fell from 28.8% to 17.1%, 15.8% to 13.7%, and 32.9% to 29.6%, respectively. Biological treatment use rose from 15.0% to 18.7%. Adalimumab was the most frequently prescribed biologic (1604 patients; 52% of all biologics in 2017). Ostomy rates per 1000 patients/year fell from 13.2 in 2011 to 9.8 in 2017, and surgical resection rates from 24.1 to 18.0. The rate of CD-related hospitalisations per 1000 patients/year also fell, from 92.7 to 72.2. Conclusion Biological drug use rose from 15.0% to 18.7% between 2011 and 2017. During the same period, we observed an improvement in the outcomes of CD patients.

journal of crohn's and colitis

P743 Time trends of Crohn’s disease in Catalonia from 2011 to 2017. Increasing use of biologics correlates with a reduced need for surgery. A population-based study in Catalonia