Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
1200 participants
OBSERVATIONAL
2023-08-09
2024-01-31
Brief Summary
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Many patients with atrial fibrillation, particularly old patients and those with comorbidities may have trouble achieving the dose and control requirements for warfarin therapy. On the other hand, Direct Oral Anticoagulant therapies do not require a close monitorization and have a lower risk of bleeding events, which makes them a more attractive option for many patients.
There is solid evidence behind the efficacy and safety of Direct Oral Anticoagulant therapies. Multiple clinical trials have demonstrated that Factor Xa inhibitors like rivaroxaban and apixaban are as effective as warfarin in preventing blood clots and reducing stroke risk in patients living with atrial fibrillation.
These challenges remark the need for new research that can improve our comprehension about the risk of bleeding associated to anticoagulant therapies and develop novel and more effective strategies for minimizing this risk.
Hence, an observational analysis about anticoagulant-associated intracranial hemorrhage may help identifying its incidence and prevalence, as well as treatment patterns and identifying any patient with risk factors linked to these events.
This information can be used to improve patient outcomes and guide future research.
Work Hypothesis: The majority of intracranial hemorrhage events are associated with heparin, low molecular weight heparin and warfarin instead of Factor Xa inhibitors or direct thrombin inhibitors. Nevertheless, the growing use in recent years of factor Xa inhibitors can increase the number of this therapy related bleeding events.
Detailed Description
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Primary objective: To identify the incidence and prevalence of intracranial bleeding events associated to oral anticoagulant therapy including vitamin k antagonists, factor Xa inhibitors and factor 2a inhibitors.
Secondary objective:
* To identify mortality related to intracranial bleeding associated with oral anticoagulant therapy, including vitamin K antagonists, factor Xa inhibitors and factor 2a inhibitors.
* To identify patients´ characteristics correlated with intracranial hemorrhage associated with oral anticoagulants.
* To identify treatment patterns: anticoagulant-associated intracranial bleeding management, including clinical, pharmacological, surgical, and interventional treatments, as well as procoagulant therapies.
Sample size Justification / Statistical Analysis: Non probabilistic, incidental reasoned selection.
The sample size will be determined by the number of patients with intracranial hemorrhage associated with anticoagulation in the clinical records. All electronic medical records that meet the inclusion criteria will be included in the analysis.
Descriptive analysis:
Descriptive statistics will be used for demographic and clinical characteristics of the study sample. This will include measures of central tendency (mean, median) and measures of dispersion (standard deviation, range).
Analytic (Inferential) analysis:
A univariate analysis will take place in order to examine the relationship between demographic and clinical variables with anticoagulation-associated intracranial hemorrhage This will include chi-squared tests for categorical data and T-tests or Mann-Whitney U Tests for continuous data.
A multivariable logistic regression analysis will be done to identify independent predictors of intracranial bleeding associated with anticoagulant therapy. The variables to include in the model will be determined by de univariate analysis results.
The investigators will consider a p-value under 0.05 for statistical significance.
Conditions
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Keywords
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Study Design
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CASE_ONLY
RETROSPECTIVE
Interventions
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Anticoagulant
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Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* Intracranial hemorrhage diagnosis and concomitant oral anticoagulant therapy
* Available clinical record from January 2015 to July 2023
Exclusion Criteria
* Patients that did not complete follow up on days 30 and 90 after an intracranial bleeding.
ALL
No
Sponsors
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AstraZeneca
INDUSTRY
El Instituto Nacional de Neurologia y Neurocirugia Manuel Velasco Suarez
OTHER
Responsible Party
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Vanessa Cano
Principal Investigator
Principal Investigators
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Claudia Vanessa Cano Nigenda, MD
Role: STUDY_DIRECTOR
Instituto Nacional de Neurología y Neurocirugía. Manuel Velasco Suárez
Locations
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Instituto Nacional de Neurología y Neurocirugía
Mexico City, , Mexico
Countries
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Central Contacts
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Facility Contacts
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Claudia Vanessa Cano Nigenda, MD
Role: primary
References
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Adachi T, Hoshino H, Takagi M, Fujioka S; Saiseikai Stroke Research Group. Volume and Characteristics of Intracerebral Hemorrhage with Direct Oral Anticoagulants in Comparison with Warfarin . Cerebrovasc Dis Extra. 2017;7(1):62-71. doi: 10.1159/000462985. Epub 2017 Apr 3.
Ballestri S, Romagnoli E, Arioli D, Coluccio V, Marrazzo A, Athanasiou A, Di Girolamo M, Cappi C, Marietta M, Capitelli M. Risk and Management of Bleeding Complications with Direct Oral Anticoagulants in Patients with Atrial Fibrillation and Venous Thromboembolism: a Narrative Review. Adv Ther. 2023 Jan;40(1):41-66. doi: 10.1007/s12325-022-02333-9. Epub 2022 Oct 16.
Barrios V, Cinza-Sanjurjo S, Gavin O, Egocheaga I, Burgos-Pol R, Soto J, Polanco C, Suarez J, Casado MA. Cost and burden of poor anticoagulation control with vitamin K antagonists in patients with nonvalvular atrial fibrillation in Spain. Rev Esp Cardiol (Engl Ed). 2021 Sep;74(9):773-780. doi: 10.1016/j.rec.2020.06.033. Epub 2020 Sep 24. English, Spanish.
Flaherty ML. Anticoagulant-associated intracerebral hemorrhage. Semin Neurol. 2010 Nov;30(5):565-72. doi: 10.1055/s-0030-1268866. Epub 2011 Jan 4.
Grysiewicz R, Gorelick PB. Incidence, mortality, and risk factors for oral anticoagulant-associated intracranial hemorrhage in patients with atrial fibrillation. J Stroke Cerebrovasc Dis. 2014 Nov-Dec;23(10):2479-2488. doi: 10.1016/j.jstrokecerebrovasdis.2014.06.031. Epub 2014 Oct 29.
Rozjabek HM, Coleman CI, Ashton V, Laliberte F, Oyefesobi P, Lejeune D, Germain G, Schein JR, Yuan Z, Lefebvre P, Peterson ED. Healthcare costs of stroke and major bleeding in patients with atrial fibrillation treated with non-vitamin K antagonist oral anticoagulants. J Med Econ. 2019 Aug;22(8):751-759. doi: 10.1080/13696998.2019.1603156. Epub 2019 Apr 25.
Hellenbart EL, Faulkenberg KD, Finks SW. Evaluation of bleeding in patients receiving direct oral anticoagulants. Vasc Health Risk Manag. 2017 Aug 23;13:325-342. doi: 10.2147/VHRM.S121661. eCollection 2017.
Izumi C, Miyake M, Amano M, Kitai T, Obayashi Y, Takegami M, Kimura T, Sugio K, Matsumoto T, Nishimura K, Furukawa Y. Registry of antithrombotic therapy in atrial fibrillation patients with bioprosthetic valves: A retrospective observational study. J Cardiol. 2020 Jul;76(1):44-50. doi: 10.1016/j.jjcc.2020.02.006. Epub 2020 Mar 7.
Lip GYH, Banerjee A, Boriani G, Chiang CE, Fargo R, Freedman B, Lane DA, Ruff CT, Turakhia M, Werring D, Patel S, Moores L. Antithrombotic Therapy for Atrial Fibrillation: CHEST Guideline and Expert Panel Report. Chest. 2018 Nov;154(5):1121-1201. doi: 10.1016/j.chest.2018.07.040. Epub 2018 Aug 22.
Milling TJ Jr, Frontera J. Exploring indications for the Use of direct oral anticoagulants and the associated risks of major bleeding. Am J Manag Care. 2017 Apr;23(4 Suppl):S67-S80.
Miyamoto S, Ikeda T, Ogawa S, Kitazono T, Nakagawara J, Minematsu K, Murakawa Y, Iwashiro S, Takeichi M, Kidani Y, Okayama Y, Sunaya T, Sato S, Yamanaka S. Clinical Risk Factors of Thromboembolic and Major Bleeding Events for Patients with Atrial Fibrillation Treated with Rivaroxaban in Japan. J Stroke Cerebrovasc Dis. 2020 Apr;29(4):104584. doi: 10.1016/j.jstrokecerebrovasdis.2019.104584. Epub 2020 Jan 23.
Qureshi AI, Mendelow AD, Hanley DF. Intracerebral haemorrhage. Lancet. 2009 May 9;373(9675):1632-44. doi: 10.1016/S0140-6736(09)60371-8.
Rohla M, Weiss TW, Pecen L, Patti G, Siller-Matula JM, Schnabel RB, Schilling R, Kotecha D, Lucerna M, Huber K, De Caterina R, Kirchhof P. Risk factors for thromboembolic and bleeding events in anticoagulated patients with atrial fibrillation: the prospective, multicentre observational PREvention oF thromboembolic events - European Registry in Atrial Fibrillation (PREFER in AF). BMJ Open. 2019 Mar 30;9(3):e022478. doi: 10.1136/bmjopen-2018-022478.
Roskell NS, Samuel M, Noack H, Monz BU. Major bleeding in patients with atrial fibrillation receiving vitamin K antagonists: a systematic review of randomized and observational studies. Europace. 2013 Jun;15(6):787-97. doi: 10.1093/europace/eut001. Epub 2013 Feb 13.
Ruiz-Sandoval JL, Chiquete E, Garate-Carrillo A, Ochoa-Guzman A, Arauz A, Leon-Jimenez C, Carrillo-Loza K, Murillo-Bonilla LM, Villarreal-Careaga J, Barinagarrementeria F, Cantu-Brito C; RENAMEVASC investigators. Spontaneous intracerebral hemorrhage in Mexico: results from a Multicenter Nationwide Hospital-based Registry on Cerebrovascular Disease (RENAMEVASC). Rev Neurol. 2011 Dec 16;53(12):705-12. English, Spanish.
Deitelzweig S, Neuman WR, Lingohr-Smith M, Menges B, Lin J. Incremental economic burden associated with major bleeding among atrial fibrillation patients treated with factor Xa inhibitors. J Med Econ. 2017 Dec;20(12):1217-1223. doi: 10.1080/13696998.2017.1362412. Epub 2017 Aug 11.
You JJ, Singer DE, Howard PA, Lane DA, Eckman MH, Fang MC, Hylek EM, Schulman S, Go AS, Hughes M, Spencer FA, Manning WJ, Halperin JL, Lip GYH. Antithrombotic therapy for atrial fibrillation: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. Chest. 2012 Feb;141(2 Suppl):e531S-e575S. doi: 10.1378/chest.11-2304.
Other Identifiers
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INNN-DI-CI-271-2023
Identifier Type: -
Identifier Source: org_study_id