Abstract
INTRODUCTION: This study evaluated the prevalence and incidence of systemic lupus erythematosus (SLE) in Germany and explored real-world data on sequence of therapy (SOT; sequence of drugs as prescribed in clinical practice). METHODS: This retrospective, observational, longitudinal cohort study using German claims data from the WIG2 GmbH Scientific Institute for Health Economics and Health System Research database (January 2011-December 2019), extrapolated to the statutory health insurance (SHI)-insured population, evaluated prevalence and incidence in an epidemiological analysis group and SLE treatment patterns in an incident cohort (subgroup ≥ 18 years of age with incident disease and ≥ 24-month follow-up post index date). Analyses were descriptive. RESULTS: Based on the epidemiological analysis (N = 3017), annual SLE prevalence per 100,000 gradually increased from 40.47 in 2012 to 59.87 in 2019 in the SHI population. In contrast, annual SLE incidence was relatively stable, ranging from 8.83 in 2012 to 8.86 in 2019. In the incident cohort (n = 941), based on SOT analysis (n = 681), treatment gaps of > 60 days were common: 67.1%, 51.2% and 54.9% in SOT1, SOT2 and SOT3, respectively. Corticosteroids were the most frequent monotherapy in SOT1 (31.0% vs 0% in SOT2/SOT3); 30.0-70.0% of patients received a corticosteroid combination therapy across SOTs. Over 50% of patients in each SOT received an antimalarial therapy (combination or monotherapies). The use of biologic disease-modifying drugs was low, ranging from 0.4% in SOT1 to 9.7% in SOT3. CONCLUSIONS: Our data demonstrate an increased prevalence of SLE with stable incidence in Germany, suggesting improved survival of affected patients. Nevertheless, suboptimal treatment patterns, including limited use of biologics, reflect a high unmet need for optimised and personalised therapies in patients with SLE.