Response to: ‘Risk of systemic lupus erythematosus in patients with idiopathic thrombocytopenic purpura: a need for a more accurate control group?’ by Mertz and Arnaud

Response to: ‘Correspondence on ‘Increased risk of systemic lupus erythematosus in patients with autoimmune haemolytic anaemia’’ by Huang and Zhang

“…The incidences of SLE were 383.15 cases per 100 000 person-months and 404.47 cases per 100 000 person-months in patients with AIHA with and without ITP, respectively (incidence rate ratio 0.95, 95% CI 0.44 to 2.03). Among ITP patients without AIHA, Zhu et al 3 recently reported that the incidence of SLE was 52.45 cases per 100 000 person-months using the NHIRD. Also, we agree with Huang and Zhang1 that both AIHA and ITP are associated with antiphospholipid antibodies 4.…”