Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Multicenter Study
. 2019 Apr;126(5):656-661.
doi: 10.1111/1471-0528.15469. Epub 2018 Oct 24.

Factors associated with first thrombosis in patients presenting with obstetric antiphospholipid syndrome (APS) in the APS Alliance for Clinical Trials and International Networking Clinical Database and Repository: a retrospective study

Affiliations
Multicenter Study

Factors associated with first thrombosis in patients presenting with obstetric antiphospholipid syndrome (APS) in the APS Alliance for Clinical Trials and International Networking Clinical Database and Repository: a retrospective study

G R de Jesús et al. BJOG. 2019 Apr.

Abstract

Objective: To evaluate the subsequent rate of thrombosis among women with obstetric antiphospholipid syndrome (Ob-APS) in a multicentre database of antiphospholipid antibody (aPL)-positive patients, and the clinical utility of the adjusted Global Antiphospholipid Syndrome Score (aGAPSS), a validated tool to assess the likelihood of developing new thrombosis, in this group of patients.

Design: Retrospective study.

Setting: The Antiphospholipid Syndrome Alliance for Clinical Trials and International Networking Clinical Database and Repository.

Population: Women with Ob-APS.

Methods: Comparison of clinical and laboratory characteristics and measurement of aGAPSS in women with Ob-APS, with or without thrombosis, after initial pregnancy morbidity (PM).

Main outcome measures: Risk factors for thrombosis and aGAPSS.

Results: Of 550 patients, 126 had Ob-APS; 74/126 (59%) presented with thrombosis, and 47 (63%) of these women developed thrombosis after initial PM, in a mean time of 7.6 ± 8.2 years (4.9/100 patient years). Younger age at diagnosis of Ob-APS, additional cardiovascular risk factors, superficial vein thrombosis, heart valve disease, and multiple aPL positivity increased the risk of first thrombosis after PM. Women with thrombosis after PM had a higher aGAPSS compared with women with Ob-APS alone [median 11.5 (4-16) versus 9 (4-13); P = 0.0089].

Conclusion: Based on a retrospective analysis of our multicentre aPL database, 63% of women with Ob-APS developed thrombosis after initial obstetric morbidity; additional thrombosis risk factors, selected clinical manifestations, and high-risk aPL profile increased the risk. Women with subsequent thrombosis after Ob-APS had a higher aGAPSS at entry to the registry. We believe that aGAPSS is a valid tool to improve risk stratification in aPL-positive women.

Tweetable abstract: More than 60% of women with obstetric antiphospholipid syndrome had thrombosis after initial pregnancy morbidity.

Keywords: Antiphospholipid antibodies; antiphospholipid syndrome; fetal death; miscarriage; pre-eclampsia; thrombosis.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.. Global Antiphospholipid Syndrome (APS) Score Based on Obstetric APS (OAPS) versus Obstetric and Thrombotic APS (O+T APS).
Data are shown as box plots, where each box represents the 25th–75th percentiles: lines inside the box represent the median. The whiskers represent the 95% CI. * Assessed by t-test

Comment in

References

    1. Miyakis S, Lockshin MD, Atsumi T, Branch DW, Brey RL, Cervera R, et al. International consensus statement on an update of the classification criteria for definite antiphospholipid syndrome (APS). J Thromb Haemost. 2006;4(2):295–306. - PubMed
    1. Drozidnsky G, Hadar E, Shmueli A, Gabbay-Benziv R, Shiber S. Obstetric antiphospholipid syndrome and long term arterial thrombosis risk. J Thromb Thrombolysis. 2017;44(3):371–375 - PubMed
    1. Gris J-C, Bouvier S, Molinari N, Galanaud J-P, Cochery-Nouvellon E, Mercier E, et al. Comparative incidence of a first thrombotic event in purely obstetric antiphospholipid syndrome with pregnancy loss: the NOH-APS observational study. Blood. 2012;119(11):2624–32. - PubMed
    1. Martinez-Zamora MA, Peralta S, Creus M, Tassies D, Reverter JC, Espinosa G, et al. Risk of thromboembolic events after recurrent spontaneous abortion in antiphospholipid syndrome: a case-control study. Ann Rheum Dis. 2012;71(1):61–6. - PubMed
    1. Erkan D, Harrison MJ, Levy R, Peterson M, Petri M, Sammaritano L, et al. Aspirin for primary thrombosis prevention in the antiphospholipid syndrome: A randomized, double-blind, placebo-controlled trial in asymptomatic antiphospholipid antibody–positive individuals. Arthritis Rheum. 2007;56(7):2382–91. - PubMed

Substances