Clinical characteristics of patients (stratified according to IgA anti-β2GPI titer) and controls.

*Abbreviations used in this table: SLE, systemic lupus erythematosus; TMA, thrombotic microangiopathy.
†Among IgA anti-β2GPI positive patients, 5 had both an arterial and a venous event (3 with mild elevation, 1 with moderate elevation, 1 with severe elevation), 4 patients had both an arterial event and TMA (2 with mild elevation, 2 with moderate elevation), 1 patient had both a venous event and TMA (with moderate elevation), and 1 patient had 2 arterial events (with severe elevation). Among controls, 4 had both an arterial and a venous event.
#Among IgA anti-β2GPI positive patients, non-SLE patients included the following autoimmune or rheumatologic diagnoses: Cogan's syndrome (n = 1), fibromyalgia (n = 1), Hashimoto's thyroiditis (n = 1), mixed connective tissue disease (n = 1), myelitis (n = 1), polycystic ovary syndrome (n = 1), sarcoidois (n = 1), scleroderma (n = 1), sickle cell anemia (n = 2), Sjögren's syndrome (n = 1), Tietze's syndrome (n = 1), and Wegener's granulomatosis (n = 1). Among controls, non-SLE individuals included: amyotrophic lateral sclerosis (n = 1), Behcet's syndrome (n = 1), chondrocalcinosis (n = 1), HELLP syndrome (n = 1), inflammatory polyarthropathy (n = 1), osteoporosis (n = 1), Raynaud's disease (n = 1), Sjögren's syndrome (n = 2), and ulcerative colitis (n = 1).