Checks blood levels of blood thinners in people with atrial fibrillation
Studies how blood thinner levels relate to outcomes in adults with atrial fibrillation.
Plain-language title generated from the registry record
Registry title: The Association Between Non-vitamin K Antagonist Oral Anticoagulant Concentration and Clinical Outcomes.
Key facts
- Where
- Taipei, TaiwanSee the site
Where in Taiwan
- National Taiwan University HospitalTaipei, TaiwanTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- National Taiwan University Hospital
- Trial code
- NCT05333666
- Record updated
- 26 March 2025
- Original description
Introduction: Non-vitamin K antagonist oral anticoagulants (NOAC) is the first line therapy to prevent ischemic stroke or systemic thromboembolism among atrial fibrillation (AF) patients. Since 2016, our study team enrolled patients under NOAC therapy in National Taiwan University Hospital, and measured their NOAC concentration to develop a cohort of NOAC treatment and NOAC concentration.Read full original descriptionShow less
The Association Between Non-vitamin K Antagonist Oral Anticoagulant Concentration and Clinical Outcomes (The Direct Oral AntiCoagulant Registry in Taiwan, DOACT)
Introduction: Non-vitamin K antagonist oral anticoagulants (NOAC) is the first line therapy to prevent ischemic stroke or systemic thromboembolism among atrial fibrillation (AF) patients. Since 2016, our study team enrolled patients under NOAC therapy in National Taiwan University Hospital, and measured their NOAC concentration to develop a cohort of NOAC treatment and NOAC concentration.
Study purpose: Based on the cohort of NOAC therapy, we aim to investigate factors driving high or low NOAC concentration, and link NOAC concentration to clinical outcomes.
Methods: For all the participants in the cohort, we will retrieve their basic characteristic, concurrent medications, laboratory tests and clinical outcomes such as ischemic stroke, systemic thromboembolism, intracranial hemorrhage, major bleeding and death from the electronic medical records. The NOAC concentration will be compared to the expected range reported in clinical trials to define higher, within or lower than expected range. Univariate logistic regression will be used first, followed by multivariate logistic regression to investigate factors associated with high or low NOAC concentration. The relationship between NOAC concentration and clinical outcomes will be investigated by using the Cox proportional hazard model.
Inclusion: Age more than 20 years; Under NOAC therapy.
Exclusion: Failed to provide at least one blood sample for NOAC concentration measurement; Declined to provide informed consent.