Developing a risk score for blood clots in cancer patients
Official title: Development of a Risk Stratification Score for Recurrent Venous Thromboembolism and Treatment-related Clinically Relevant Bleeding in Patients With Cancer-associated Thrombosis
Run by Ottawa Hospital Research Institute · NCT06894576 · Data updated 2026-11-12
This study is trying to create a tool to help doctors figure out which cancer patients are at higher or lower risk for blood clots and bleeding after their diagnosis.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 1000 (estimated) |
| Sponsor | Ottawa Hospital Research Institute Academic / other |
| Locations | 1 site (Ottawa, Ontario) |
| Status | Recruiting |
| Started | December 3, 2024 |
| Main results expected | December 2027 |
| Study ends | December 2027 |
| Registry record updated | March 25, 2025 |
| Trial ID | NCT06894576 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include adults aged 18 and older with documented cancer-associated thrombosis who are receiving anticoagulant treatment.
✕Probably not a fit
Patients with unusual sites of thrombosis or those under 18 years old may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study aims to create a risk assessment model that identifies cancer-associated thrombosis patients who are at low and high risk for recurrent venous thromboembolism and clinically relevant bleeding within six months of diagnosis. It will involve the collection of blood samples for a biobank to support future research in cancer genetics and hemostasis. Participants will be followed up at three and six months post-enrollment to monitor for any bleeding events and changes in treatment. The study is expected to recruit participants over a two-year period.
Why it matters
Potential benefit: If successful, this study could lead to improved risk stratification and management of blood clots in cancer patients, potentially reducing complications and enhancing patient outcomes.
How similar studies have gone: Other studies have explored risk assessment in thrombosis, but this specific approach to cancer-associated thrombosis is novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Objectively documented distal and/or proximal DVT of the limb (upper or lower extremity) and/or PE, splanchnic vein thrombosis and/or cerebral sinus vein thrombosis in presence of active cancer of all types * Intended treatment of CAT for at least 6 months with parenteral or oral anticoagulants at therapeutic dosing. * Estimated life expectancy \> 6 months * Willingness to give an informed consent * Age ≥ 18 years Exclusion Criteria: * Unusual site CAT (gonadal vein thrombosis, ovarian vein thrombosis, retinal vein thrombosis) * Superficial vein thrombosis * Refusal of informed consent \> 72 hrs of anticoagulants * Age \< 18 years old
Where it's running
-
Ottawa Hospital Research Institute
Ottawa, Ontario, Canada Recruiting
Study contacts
- Principal investigator: Marc Carrier, MD — Ottawa Hospital
- Study coordinator: Kristina Vrotniakaite-Bajerciene, MD
- Email: kvrotniakaite@toh.ca
- Phone: 613-737-8899
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.