Are randomized clinical trials good for us (in the short term)? Evidence for a "trial effect".
D A Braunholtz, S J Edwards, R J Lilford
https://pubmed.ncbi.nlm.nih.gov/11223318/Actively Recruiting
Led by American Thrombosis and Hemostasis Network · Updated on 2026-07-13
3000
Participants Needed
71
Research Sites
26 weeks
Total Duration
Researchers are conducting a long-term observational study called ATHN Transcends to better understand non-cancerous blood disorders. This study follows participants with various hematologic conditions, including hemophilia, von Willebrand Disease, congenital platelet disorders, rare bleeding disorders, thrombosis, and other related conditions. The aim is to collect uniform and high-quality data on the safety, effectiveness, and treatment practices of new and existing therapies over many years, addressing gaps beyond initial clinical trials and real-world treatment outcomes. Participants are assigned to specific cohorts based on their diagnosis, such as Hemophilia, Congenital Platelet Disorders, and others. Within these cohorts, there are multiple study arms and modules focusing on different therapies or disease aspects, including gene therapy outcomes and product-specific data collection. Data is gathered through scheduled assessments at enrollment, every six months, annually, and as needed, with follow-up planned for a minimum of 15 years. The study also includes a biorepository for collecting biological samples to support current and future research. Throughout the study, participants provide information during regular visits, and data is collected about their medication use, bleeding events, and treatment effectiveness. Researchers monitor safety and treatment outcomes continuously to better understand long-term effects. The study involves comprehensive evaluations but does not involve administering treatments instead, it observes participants receiving usual care. Participants may remain in the study for many years, contributing to a valuable resource that helps improve understanding of blood disorders and their management.
CONDITIONS
ATHN Transcends: A Natural History Study of Non-Neoplastic Hematologic Disorders
C
Carol Fedor, ND, RN, CCRC
N
Nana Ama Afari-Dwamena, MPH
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American Thrombosis and Hemostasis Network
Lead Sponsor
Pfizer
Collaborating Sponsor
You may qualify if you...
You will not qualify if you...
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
Duration - Minimum of 15 years
Participants provide data about their blood disorder, treatments, bleeding events, and health status at enrollment and during regular visits every 6 months and annually. Additional data may be collected as needed based on specific study arms and modules.
Semi-annual and annual visits, plus ad hoc assessments
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
7
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https://pubmed.ncbi.nlm.nih.gov/27977390/American Thrombosis and Hemostasis Network
Lead Sponsor
Pfizer
Collaborating Sponsor