This will be a prospective, multicenter study (5 centers) based on routine clinical practice, without any additional procedures. Data will be collected from electronic medical records and entered in a pseudonymized manner into the electronic case report form (RedCAP).
The data collected in this study include: demographic data (age, sex); disease-related data (date of diagnosis, disease duration, location, and phenotype); data on risankizumab treatment (start date, dosage, adverse events); clinical data (symptoms); laboratory data (CRP and fecal calprotectin); and radiological data (intestinal ultrasounds). These data will be collected, when available, at treatment initiation with SKYRIZI, and at weeks 4 and 12 as part of routine care.