Clinical trial Recruiting at 1 site Observational Ages 18 and up

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 typeObservational
Ages18 Years and up
SexAll
Enrollment1000 (estimated)
SponsorOttawa Hospital Research Institute
Academic / other
Locations1 site (Ottawa, Ontario)
StatusRecruiting
StartedDecember 3, 2024
Main results expectedDecember 2027
Study endsDecember 2027
Registry record updatedMarch 25, 2025
Trial IDNCT06894576 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.