TY - JOUR T1 - Correspondence on ‘Risk of systemic lupus erythematosus after immune thrombocytopenia and autoimmune haemolytic anaemia: a nationwide French study’ JF - Annals of the Rheumatic Diseases JO - Ann Rheum Dis SP - e95 LP - e95 DO - 10.1136/annrheumdis-2020-219470 VL - 82 IS - 4 AU - Julien Maquet AU - Margaux Lafaurie AU - Laurent Sailler AU - Maryse Lapeyre-Mestre AU - Guillaume Moulis Y1 - 2023/04/01 UR - http://ard.bmj.com/content/82/4/e95.abstract N2 - We read with great interest the articles by Zhu et al 1 and Mo et al 2 studying the risk of new systemic lupus erythematosus (SLE) diagnosis after immune thrombocytopenia (ITP) and autoimmune haemolytic anaemia (AIHA) diagnoses in the Taiwanese National Health Database. Zhu et al observed 34 SLE cases among 723 patients with incident ITP between 2000 and 2013. The 1-year and 5-year cumulative incidences were 1.9% and 4.8%, respectively.1 Mo et al reported the diagnosis of 117 SLE during the follow-up of 731 patients with incident AIHA between 2005 and 2012. The 1-year and 5-year cumulative incidences were 11.3% and 17.3%, respectively.2 In the present study, we estimated the risk of new SLE after incident ITP or AIHA in the entire French general population. FAITH and AHEAD cohorts3 are the French nationwide cohorts of adult patients with incident primary ITP and AIHA, respectively. These cohorts are built using validated algorithms in the French health database (Système National des Données de Santé), which links sociodemographic, out-hospital and in-hospital data for the entire French population (>66 million inhabitants).4 SLE was defined by the date of first in-hospital or chronic disease … ER -