Characteristics of Patients With Antiphospholipid Antibody Positivity in the APS ACTION International Clinical Database and Repository
Open accessAbstract
Objective: To describe the baseline characteristics of patients with positivity for antiphospholipid antibodies (aPLs) who were enrolled in an international registry, the Antiphospholipid Syndrome (APS) Alliance for Clinical Trials and International Networking (APS ACTION) clinical database and repository, overall and by clinical and laboratory subtypes. Methods: The APS ACTION registry includes adults who persistently had positivity for aPLs. We evaluated baseline sociodemographic and aPL‐related (APS classification criteria and “non‐criteria”) characteristics of patients overall and in subgroups (aPL‐positive without APS, APS overall, thrombotic APS only, obstetric APS only, and both thrombotic APS/obstetric APS). We assessed baseline characteristics of patients tested for the presence of three aPLs (lupus anticoagulant [LAC] test, anticardiolipin antibody [aCL], and anti–β 2‐glycoprotein I [anti‐β 2 GPI]) antibodies by aPL profiles (LAC only, single, double, and triple aPL positivity). Results: The 804 aPL‐positive patients assessed in the present study had a mean age of 45 ± 13 years, were 74% female, and 68% White; additionally, 36% had other systemic autoimmune diseases. Of these 804 aPL‐positive patients, 80% were classified as having APS (with 55% having thrombotic APS, 9% obstetric APS, and 15% thrombotic APS/obstetric APS). In the overall cohort, 71% had vascular thrombosis, 50% with a history of pregnancy had obstetric morbidity, and 56% had experienced at least one non‐criteria manifestation. Among those with three aPLs tested (n = 660), 42% were triple aPL–positive. While single–, double–, and triple aPL–positive subgroups had similar frequencies of vascular, obstetric, and non‐criteria events, these events were lowest in the single aPL subgroup, which consisted of aCLs or anti‐β 2 GPI only. Conclusion: Our study demonstrates the heterogeneity of aPL‐related clinical manifestations and laboratory profiles in a multicenter international cohort. Within single aPL positivity, LAC may be a major contributor to clinical events. Future prospective analyses, using standardized core laboratory aPL tests, will help clarify aPL risk profiles and improve risk stratification.
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aCL are generally regarded as less symptomatic than LA or aB2GPI.
“which implies that aCL are generally regarded as less symptomatic than their conventional aPL counterparts.”
From Single or triple positivity for antiphospholipid antibodies in “carriers” or symptomatic patients: Untangling the knot (2021) · cites this paper as [5]
The Discussion (page not provided) says LAC positivity may be a stronger risk factor for thrombosis and pregnancy morbidity than positivity for either aCL or anti-β2GPI. It does not say that aCL is less symptomatic than anti-β2GPI, so it supports only the comparison with LAC. (LLM, conf=0.86)
Experimental — accuracy not yet measuredIn the literature, among aPL, isolated LA and aB2GPI are generally found to be associated with higher thrombotic risk than aCL.
“In the literature, 5- 8 among the aPL, isolated LA and aB2GPI are generally found to be associated with higher thrombotic risk than aCL.”
From Single or triple positivity for antiphospholipid antibodies in “carriers” or symptomatic patients: Untangling the knot (2021) · cites this paper as [5]
The Results (page not available in our copy) report that patients with isolated LAC positivity had the highest proportion of vascular events among the single-positive groups. The Discussion says LAC may carry greater thrombosis risk than either aCL or anti-β2GPI. It does not establish that isolated anti-β2GPI carries greater thrombotic risk than aCL. (LLM, conf=0.88)
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- Authors
- Sevim, E., Zisa, D., Andrade, D., Sciascia, S., Pengo, V., Tektonidou, M. G., Ugarte, A., Gerosa, M., Belmont, H. M., Zamorano, M. A. A., Fortin, P. R., Ji, L., Efthymiou, M., Cohen, H., Branch, D. W., de Jesus, G. R., Andreoli, L., Petri, M., Rodriguez, E., Cervera, R., Knight, J. S., Atsumi, T., Willis, R., Roubey, R., Bertolaccini, M. L., Erkan, D., Barbhaiya, M., & APS ACTION Investigators
- Affiliations
- Hospital for Special Surgery (US)
- Universidade de São Paulo (BR)
- University of Turin (IT)
- University of Padua (IT)
- National and Kapodistrian University of Athens (GR)
- Hospital de Cruces (ES)
- University of Milan (IT)
- New York University Langone Medical Center New York New York
- Maimonides Institute for Biomedical Research of Cordoba Cordoba Spain
- Université Laval (CA)
- Peking University First Hospital (CN)
- University College London (GB)
- Intermountain Healthcare (US)
- Rio de Janeiro State University Rio de Janeiro Brazil
- University of Brescia Brescia Italy
- Johns Hopkins University (US)
- Hospital Universitario 12 de Octubre Madrid Spain
- Hospital Clínic de Barcelona (ES)
- University of Michigan (US)
- Hokkaido University Hospital (JP)
- The University of Texas Medical Branch at Galveston (US)
- University of North Carolina at Chapel Hill (US)
- St Thomas’ Hospital London UK
- Corresponding author
- Barbhaiya, Medha
- ORCID
- Sevim, Ecem
- Zisa, Diane
- Andrade, Danieli
- Sciascia, Savino
- Pengo, Vittorio
- Tektonidou, Maria G.
- Gerosa, Maria
- Fortin, Paul R.
- Ji, Lanlan
- Efthymiou, Maria
- Cohen, Hannah
- Branch, D. Ware
- de Jesus, Guilherme Ramires
- Andreoli, Laura
- Petri, Michelle
- Cervera, Ricard
- Knight, Jason S.
- Atsumi, Tatsuya
- Willis, Rohan
- Erkan, Doruk
- Barbhaiya, Medha
- Venue
- Arthritis Care & Research
- Publisher
- Wiley
- Published
- 2022-01-25
- Volume
- 74
- Issue
- 2
- Pages
- 324-335
- ISSN
- 0893-7524 (ISSN-L)
- 2151-464X
- 2151-4658
- PMC
- PMC10725727
- OpenAlex
- W3091092179
- Cited by
- 88
- References
- 48
- Citations by year
- 2026: 14 · 2025: 19 · 2024: 16 · 2023: 20 · 2022: 8 · 2021: 10 · 2020: 1
- FWCI
- 7.35
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Arthritis Care & Research (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Deep Blue (University of Michigan) (submittedVersion)
- UCL Discovery (University College London) (submittedVersion)
- Institutional Research Information System (Università degli Studi di Brescia) (submittedVersion)
- Institutional Research Information System University of Turin (University of Turin) (submittedVersion)
- Funders
- Canada Research Chairs
- National Institutes of Health (R01‐AR069572)
- Rheumatology Research Foundation
- Topics
- Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Vasculitis and related conditions
- Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
- Keywords
- antiphospholipid antibodies, antiphospholipid syndrome, lupus anticoagulant, anticardiolipin antibodies, anti-beta2-glycoprotein I antibodies, vascular thrombosis, pregnancy complications, risk stratification, systemic autoimmune diseases
- MeSH terms
- Adult, Female, Humans, Male, Middle Aged, Registries, Cohort Studies, Antibodies, Antiphospholipid
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