Longitudinal assessment of disease burden in juvenile systemic lupus erythematosus: A multicenter study of activity and damage scores

Abstract

Introduction Juvenile Systemic Lupus Erythematosus (jSLE) is a rare pediatric rheumatic disease characterized by systemic inflammation that can lead to organ damage. Compared to adults, it often has a more severe course in children. Both disease activity and treatments may result in temporary or permanent damage.Objectives To evaluate risk factors associated with damage occurrence in patients with jSLE.Methods This multicenter, retrospective study included patients with jSLE followed for at least 12 months. Low-dose corticosteroid therapy was defined as prednisolone 0.01-0.03 mg/kg/day (max 7.5 mg/day). The annual cumulative steroid dose was calculated by dividing the total steroid intake by 365.25 times the number of follow-up years. Collected data included SLEDAI and SDI scores at initial and final visits, laboratory parameters, and flare characteristics.Results A total of 158 patients (86.7% female) from 17 centers were included. Median age at diagnosis was 13.8 years, with a median follow-up of 35 months. Organ damage was present in 14 patients at diagnosis and in 23 at final visit. Damage types included proteinuria, cognitive dysfunction (each 3.2%), and others such as cataracts, erosive arthritis, avascular necrosis, optic atrophy, and vertebral collapse. Patients with damage had significantly higher SLEDAI scores at both time points, delayed transition to low-dose steroids, and a lower rate of achieving Lupus Low Disease Activity State (LLDAS) (p = .006).Conclusion Persistent disease activity and delayed control are major contributors to organ damage in jSLE. Early and sustained disease suppression is critical to prevent long-term complications.