Avacostar - (PASS)

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The Avacostar PASS is a non-interventional, multi-national, prospective cohort study that will collect data from 2 cohorts of patients: those treated with avacopan for active severe AAV, and a second cohort treated with a cyclophosphamide or rituximab-based induction regimen without avacopan for active severe AAV. The overall study duration is anticipated to be up to 7 years, including a recruitment period of approximately 3 years. Enrolled patients will be followed until the last patient last visit (LPLV) milestone, which will be 4 years after the last participant is enrolled. Germany and the United Kingdom (UK) have been selected for the study. Additional countries may be considered according to availability of avacopan and suitability for the study. Patients will be enrolled prospectively, but up to 6 months of data may be collected retrospectively if necessary. Baseline visit is defined as the day that induction treatment (avacopan or non-avacopan standard of care (SoC) cyclophosphamide or rituximab) is started for active severe AAV. Patients who started avacopan/SoC induction therapy for active severe AAV within 6 months of the enrolment visit and fulfil eligibility criteria may be enrolled in the PASS. Individual participant follow-up data will be collected periodically at routine clinic visits until the LPLV, which will be 4 years after the last participant is enrolled. The primary objective of the study is: To evaluate the incidence of defined Medical Events of Special Interest (MESIs) in patients with AAV commencing avacopan.