A Treatment Effectiveness Study Among SLE Patients Receiving Anifrolumab in Routine Clinical Practice.

ASTER is a multi-country, single-arm, prospective, observational study. The study will be initiated on a country-by country basis following the commercial launch of anifrolumab. ASTER is a cohort study, with 1-year retrospective baseline data and up to 5 years of follow-up data. The minimum enrolment period is anticipated to be 18 months (± 5 months) per country, but it may be extended, if necessary, to reach the overall study target. In general, patients will enter the study between the first anifrolumab prescription and infusion (index), with follow-up until death, loss to follow-up, patient discontinuing the study, or end of study period (whichever occurs first). Data collection will continue for all patients including those who have discontinued anifrolumab during the study, unless the patients have withdrawn their consent for participation in the study. Relevant clinical data collection will continue for the entire follow up while patient reported outcome (PRO) data collection will continue only up to the 3-year follow up. The study will use clinical assessments that are relevant for SLE-treating physicians in routine clinical practice, as well as introduce a specific measure for skin manifestations to affirm the potency of anifrolumab in treating SLE-related skin manifestations. The eCRFs will be accessed through secure web-based portals and will be used to ensure consistent data collection for each healthcare provider involved in this study. Electronic data collection will be the only method of data collection in this study.