Abstract
Abstract Background Real-life long-term evidence on ustekinumab treatment response in patients with Crohn’s disease (CD) is scarce. We performed a retrospective non-interventional nationwide chart review study of dosing and long-term clinical outcomes in Finnish CD patients treated with ustekinumab (FINUSTE2, EUPAS30920). Methods FINUSTE2 involved 17 Finnish centres. Eligible patients were adults with CD, receiving an intravenous first dose of ustekinumab during 2017 or 2018. Disease activity data, such as C-reactive protein (CRP), faecal calprotectin (fCal), and the Simple Endoscopic Score for Crohn’s disease (SES-CD) were collected at baseline, 16 weeks, and one year from treatment initiation. A local gastroenterologist at each centre collected the data from health records in an electronic standardised health questionnaire. Results One hundred and fofty-five patients (48% female) with a mean age of 44 and disease duration of 14 years initiated ustekinumab treatment for CD. Table 1 summarises patient characteristics at baseline. After induction consisting of one intravenous dose and one to two subcutaneous doses at 8 to 16 weeks, 140 patients (93%) continued to maintenance treatment with subcutaneous ustekinumab. Of 93 patients with a follow-up of at least one year, 77 were still on ustekinumab. During ustekinumab treatment, SES-CD (10 at baseline, 3 at 1 year, medians, p = 0.033) and CRP (7 mg/l at baseline, 5 mg/l at 1 year, medians, p < 0.001) and fCal (776 μg/g at baseline, 305 μg/g at 1 year, medians, p < 0.001) decreased significantly in those patients with data available. Figure 1 describes changes in fCal levels over time. Conclusion In this nationwide real-life long-term follow-up study, covering all major centres in Finland, ustekinumab treatment of patients with highly refractory and long-standing CD effectively reduced inflammatory activity, assessed by endoscopy, CRP, and fCal.
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