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A Phase 2, Multicenter, Randomized, Open-Label, Active-Control Study of REGN9933, a Factor XI Monoclonal Antibody, for Prevention of Venous Thromboembolism after Elective, Unilateral, Total Knee Arthroplasty

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2022-501470-18-00
Acronym
R9933-DVT-2230
Enrollment
408
Registered
2023-04-06
Start date
2023-06-26
Completion date
2024-05-27
Last updated
2024-04-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Thromboembolic disease

Brief summary

The primary endpoint is the incidence of confirmed, adjudicated venous thromboembolism (VTE) through day 12 (REGN9933 vs enoxaparin).

Detailed description

Incidence of major bleeding (up to approximately day 12)., Incidence of clinically relevant non-major (CRNM) bleeding (up to approximately day 12)., Incidence of treatment emergent adverse events (TEAEs) (through end of study; approximately day 75)., Incidence of major VTE through day 12 (REGN9933 versus enoxaparin)., Incidence of DVT as measured by venography of the operated leg (approximately day 12; REGN9933 vs enoxaparin)., Concentrations of REGN9933 in serum (through end of study; approximately day 75)., Change in activated partial thromboplastin time (aPTT) from baseline (through end of study; approximately day 75)., Change in prothrombin time (PT) from baseline (through end of study; approximately day 75)., Incidence of anti-drug antibodies (ADA) to REGN9933 (through end of study; approximately day 75)., Titer of anti-drug antibodies (ADA) to REGN9933 (through end of study; approximately day 75)., Incidence of confirmed, adjudicated VTE (baseline through day 12; enoxaparin vs apixaban).

Interventions

Sponsors

Regeneron Pharmaceuticals Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
The primary endpoint is the incidence of confirmed, adjudicated venous thromboembolism (VTE) through day 12 (REGN9933 vs enoxaparin).

Secondary

MeasureTime frame
Incidence of major bleeding (up to approximately day 12)., Incidence of clinically relevant non-major (CRNM) bleeding (up to approximately day 12)., Incidence of treatment emergent adverse events (TEAEs) (through end of study; approximately day 75)., Incidence of major VTE through day 12 (REGN9933 versus enoxaparin)., Incidence of DVT as measured by venography of the operated leg (approximately day 12; REGN9933 vs enoxaparin)., Concentrations of REGN9933 in serum (through end of study; approximately day 75)., Change in activated partial thromboplastin time (aPTT) from baseline (through end of study; approximately day 75)., Change in prothrombin time (PT) from baseline (through end of study; approximately day 75)., Incidence of anti-drug antibodies (ADA) to REGN9933 (through end of study; approximately day 75)., Titer of anti-drug antibodies (ADA) to REGN9933 (through end of study; approximately day 75)., Incidence of confirmed, adjudicated VTE (baseline through day 12; enoxaparin vs ap

Countries

Belgium, Bulgaria, Hungary, Latvia, Lithuania, Poland

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026