2051 Long-term follow-up of Israeli patients with lupus nephritis

Abstract Background and Aims Systemic lupus erythematosus (SLE) often affects the kidneys, and is associated with morbidity and mortality. Ethnic variations in clinical response to treatment and outcomes have been described. Information on real-life, long-term cohorts of the Middle Eastern Israeli population is lacking. We aimed to characterize the prevalence and long-term outcomes of kidney involvement in SLE patients in Israel and to identify variables associated with lupus nephritis (LN) and end-stage kidney disease (ESKD). Method This retrospective study, conducted between 2014-2023, included adult patients with SLE diagnosed for at least 12 months. Kidney involvement was based on a diagnosis of LN on a kidney biopsy. SLE patients without LN served as controls. Associated variables were collected including socio-demographics, disease-related characteristics, kidney-related factors, comorbidities, and all-cause mortality. Results A total of 182 adult patients with SLE were included. Of them, 54 (29.6%) had LN. Mean follow-up since diagnosis was 16.2 ± 13.8 years. Compared to the control group, patients with LN were diagnosed with SLE at younger ages (26.8 ± 12.9 vs. 35.5 ± 15.4 years, p