PREVENT CLOT Study: Aspirin as Effective as Injectable Blood Thinner to Prevent Blood Clots
About Us
- About PCORI
- The PCORI Strategic Plan
- Governance
- Evaluating Our Work
- PCORI's Advisory Panels
- Procurement Opportunities
-
Provide Input
- Draft Key Questions: Systematic Review of Audio Care for the Management of Mental Health and Chronic Conditions (2023)
- Patient-Centered Economic Outcomes Landscape (2023-2024)
-
Past Opportunities to Provide Input
- Proposed New Methodology Standards for Usual Care as a Comparator (2023)
- Stakeholder Views on Components of 'Patient-Centered Value' in Health and Health Care (2023)
- PCORI's Proposed Research Agenda (2021-2022)
- Proposed National Priorities for Health (2021)
- Proposed Principles for the Consideration of the Full Range of Outcomes Data in PCORI-Funded Research (2020)
- Proposed New PCORI Methodology Standards (2018)
- Data Access and Data Sharing Policy: Public Comment (2017)
- Proposed New PCORI Methodology Standards (2017)
-
Comment on the Proposed New and Revised PCORI Methodology Standards (2016)
- 1. Standards for Formulating Research Questions
- 10: Standards for Studies of Diagnostic Tests
- 12. Standards on Research Designs Using Clusters
- 13: General Comments on the Proposed Revisions to the PCORI Methodology Standards
- 2: Standards Associated with Patient-Centeredness
- 3: Standards for Data Integrity and Rigorous Analysis
- 4: Standards for Preventing and Handling Missing Data
- 5: Standards for Heterogeneity of Treatment Effects
- 6: Standards for Data Registries
- 7: Standards for Data Networks as Research-Facilitating Structures
- 8. Standards for Causal Inference Methods
- 9. Standards for Adaptive Trial Designs
- Peer-Review Process Comments (2014)
- Draft Methodology Report Public Comment Period (2012)
- Leadership
Image

Over-the-counter aspirin is as effective as low-molecular-weight heparin, a commonly used injectable blood thinner, in preventing life-threatening blood clots among patients hospitalized due to a fracture, according to findings from a PCORI-funded study published this month in The New England Journal of Medicine.
Led by Robert V. O’Toole, MD of the University of Maryland School of Medicine and University of Maryland Medical Center, the PREVENT CLOT Study team measured health outcomes among 12,211 bone fracture patients who received aspirin or low-molecular weight heparin at 21 trauma centers in the U.S. and Canada.
The team found that aspirin is just as good at preventing death from any cause in both groups, and it also found no differences between the groups in the incidence of blood clots in the lungs, bleeding complications, infection, wound problems and other adverse events from the treatments. Those taking aspirin had a slightly higher chance of developing clots in the lower leg, but the incidence was rare in both groups.
O’Toole, in a University of Maryland School of Medicine news release, said: "We expect the findings from this large-scale trial to have an important impact on clinical practice that may even alter the standard of care."
Posted: January 23, 2023
Tags
Recent Posts
What's Happening at PCORI?
The Patient-Centered Outcomes Research Institute sends weekly emails about opportunities to apply for funding, newly funded research studies and engagement projects, results of our funded research, webinars, and other new information posted on our site.
Image
