title: Transiently positive anticardiolipin antibodies and risk of thrombosis in patients with systemic lupus erythematosus.
abstract: Fluctuations in the titers of anticardiolipin antibodies (aCL) have been reported in systemic lupus erythematosus (SLE) patients, but their relation with thrombosis is not completely understood. Prospective inception cohort of 237 patients with SLE (American College of Rheumatology criteria). Positivity for antiphospholipid antibodies (aPL) was defined according to Sapporo criteria. aCL was defined as persistently positive when more than two-thirds of the determinations were positive during follow-up. Patients were classified into four groups: A [positive lupus anticoagulant (LA)], B (negative LA and persistently positive aCL), C (negative LA and transiently positive aCL) and D (negative LA and aCL). Of these 237 patients, 211 (89%) patients were women. Median age at diagnosis and follow-up were 32 (2-78) and 10 (1-31) years, respectively; 33 (13.9%), 23 (9.7%), 42 (17.7%) and 139 (58.6%) patients were classified in groups A, B, C and D, respectively. Thirty (12.6%) and 23 (9.7%) patients suffered arterial and venous thrombotic events, respectively. Adjusted risk for arterial thrombosis was increased in groups A [odds ratio (OR) 15.69, 95% confidential interval (CI) 4.79-51.42, P < 0.001] and B (OR 7.63, 95% CI 2.00-29.08, P = 0.003), but not in group C when compared with group D. Adjusted risk of venous thrombosis was increased in group A (OR 4.24, 95% CI 1.36-13.20, P = 0.013), but not in groups B or C when compared with group D. Risk of thrombosis is not increased in SLE patients with negative LA and transiently positive aCL, even fulfilling Sapporo laboratory criteria, when compared with aPL-negative SLE patients.
authors: Service of Internal Medicine, Hospital de Cruces, Universidad Del Pais Vasco/Euskal Herriko Unibertsitatea, Bizkaia, The Basque Country, Spain. amartinez.berriotxoa@hcru.osakidetza.net
authors: Agustin
authors: A
authors: Martinez-Berriotxoa
authors: Guillermo
authors: G
authors: Ruiz-Irastorza
authors: Maria-Victoria
authors: MV
authors: Egurbide
authors: Maider
authors: M
authors: Garmendia
authors: Jose
authors: J
authors: Gabriel Erdozain
authors: Irama
authors: I
authors: Villar
authors: Ciriaco
authors: C
authors: Aguirre
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017153:Antibodies, Anticardiolipin / Q000097:blood*; D017152:Antibodies, Antiphospholipid / Q000097:blood; D002648:Child; D015331:Cohort Studies; D005260:Female; D006801:Humans; D016682:Lupus Coagulation Inhibitor / Q000097:blood; D008180:Lupus Erythematosus, Systemic / Q000150:complications* / Q000276:immunology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012306:Risk; D013927:Thrombosis / Q000209:etiology / Q000276:immunology*
chemical_list: D017153:Antibodies, Anticardiolipin; D017152:Antibodies, Antiphospholipid; D016682:Lupus Coagulation Inhibitor