Leyre Riancho-Zarrabeitia1, Germán Daroca1, Pedro Muñoz2, Marcos López-Hoyos3, Ana Haya4, Víctor M Martínez-Taboada5. 1. Rheumatology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Facultad de Medicina, Universidad de Cantabria, Av Valdecilla s/n, 39011 Santander, Spain. 2. Unidad Docente de Medicina Familiar de Cantabria, Servicio Cántabro de Salud, Santander, Spain. 3. Immunology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Facultad de Medicina, Universidad de Cantabria, Santander, Spain. 4. Gynecology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Santander, Spain. 5. Rheumatology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Facultad de Medicina, Universidad de Cantabria, Av Valdecilla s/n, 39011 Santander, Spain. Electronic address: vmartinezt64@gmail.com.
Abstract
OBJECTIVES: To explore the clinical and serological course of fertile women with positive antiphospholipid (aPL), and the factors and therapeutic implications associated with aPL negativization. METHODS: Retrospective study including 105 women with a positive aPL serology between 1995 and 2013 attending the obstetric autoimmune pathology clinic of a tertiary facility. Patients were classified into the following 3 groups: patients with primary antiphospholipid syndrome (pAPS, 49), patients with a positive serology for aPL, not meeting clinical criteria (42), and patients with systemic lupus erythematosus and a positive aPL serology (14). They were also classified according to the serological aPL evolution: persistently negative aPL, transiently positive serology, and persistently positive serology according to established criteria. RESULTS: After a mean follow-up of 114.4 ± 37.2 months, 59% of patients had persistently negative antibodies, while 25.7% of patients presented persistently positive aPL serology. Multivariate analysis confirmed that smoking (OR = 4; 95% CI: 1.45-11.08; p = 0.008) was an independent risk factor for positive persistence. Persistent positivity as well as a higher antibody load was associated with higher risk for further pregnancy morbidity. In 29 patients, with persistently negative serology who were asymptomatic, treatment with low-dose aspirin was discontinued. No clinical events related to APS were reported after treatment withdrawal, during the 40.95 months of follow-up. CONCLUSIONS: A significant proportion of fertile women with aPL antibodies became negative during follow-up. Tobacco use and the number of positive antibodies are associated with persistently positive serology. Patients with persistently positive aPL serology suffer more obstetric complications. Treatment withdrawal might be safe in selected patients.
OBJECTIVES: To explore the clinical and serological course of fertile women with positive antiphospholipid (aPL), and the factors and therapeutic implications associated with aPL negativization. METHODS: Retrospective study including 105 women with a positive aPL serology between 1995 and 2013 attending the obstetric autoimmune pathology clinic of a tertiary facility. Patients were classified into the following 3 groups: patients with primary antiphospholipid syndrome (pAPS, 49), patients with a positive serology for aPL, not meeting clinical criteria (42), and patients with systemic lupus erythematosus and a positive aPL serology (14). They were also classified according to the serological aPL evolution: persistently negative aPL, transiently positive serology, and persistently positive serology according to established criteria. RESULTS: After a mean follow-up of 114.4 ± 37.2 months, 59% of patients had persistently negative antibodies, while 25.7% of patients presented persistently positive aPL serology. Multivariate analysis confirmed that smoking (OR = 4; 95% CI: 1.45-11.08; p = 0.008) was an independent risk factor for positive persistence. Persistent positivity as well as a higher antibody load was associated with higher risk for further pregnancy morbidity. In 29 patients, with persistently negative serology who were asymptomatic, treatment with low-dose aspirin was discontinued. No clinical events related to APS were reported after treatment withdrawal, during the 40.95 months of follow-up. CONCLUSIONS: A significant proportion of fertile women with aPL antibodies became negative during follow-up. Tobacco use and the number of positive antibodies are associated with persistently positive serology. Patients with persistently positive aPL serology suffer more obstetric complications. Treatment withdrawal might be safe in selected patients.
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