Evaluation of Lymphoma Prognosis and Survivorship in Recently Diagnosed Patients, LEO Study
LEO
The Lymphoma Epidemiology of Outcomes (LEO) Cohort Study Protocol
3 other identifiers
observational
21,000
1 country
10
Brief Summary
The goal of this infrastructure protocol is to build and maintain a large and diverse observational cohort study to support broad and cutting-edge research focused on NHL prognosis and survivorship. The LEO cohort will promote identification of clinical (including co-morbid diseases), epidemiologic (including lifestyle and other exposures), host genetic, tumor, and treatment factors that impact multiple outcomes (including event-free, overall and lymphoma-specific survival; new onset comorbidities; and patient-reported outcomes). This resource also will allow examination of the interaction among these factors in order to better understand the clinical and molecular epidemiology of outcomes in NHL. Ultimately, this approach will drive discovery and validation of treatment endpoints, improve prognostication, and identify novel approaches to improve short and long-term outcomes for NHL patients.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Aug 2021
Longer than P75 for all trials
10 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
August 3, 2021
CompletedFirst Posted
Study publicly available on registry
August 9, 2021
CompletedStudy Start
First participant enrolled
August 16, 2021
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 31, 2031
ExpectedStudy Completion
Last participant's last visit for all outcomes
March 31, 2031
February 27, 2026
February 1, 2026
9.6 years
August 3, 2021
February 25, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Overall Survival (OS)
Time from date of diagnosis to date of death
Time Frame: Short (<5 years), medium (5-10 years), and long-term (>10 years)
Secondary Outcomes (2)
Event Free Survival (EFS)
Time Frame: Short (<5 years), medium (5-10 years), and long-term (>10 years)
Lymphoma Specific Survival (LSS)
Time Frame: Short (<5 years), medium (5-10 years), and long-term (>10 years)
Eligibility Criteria
Newly diagnosed non-Hodgkin Lymphoma willing to provide a research blood sample, return enrollment and follow-up questionnaires, and allow access to medical records.
You may qualify if:
- Newly diagnosed non-Hodgkin Lymphoma (NHL), within 183 days of enrollment
- Patients may have been treated as long as initial NHL diagnosis is within 6 months of enrollment
- years of age or older
You may not qualify if:
- \- Lymphoma diagnosis greater than 184 days from date of consent
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Mayo Cliniclead
- Emory Universitycollaborator
- University of Iowacollaborator
- M.D. Anderson Cancer Centercollaborator
- Washington University School of Medicinecollaborator
- University of Rochestercollaborator
- Weill Medical College of Cornell Universitycollaborator
- University of Miamicollaborator
- National Cancer Institute (NCI)collaborator
Study Sites (10)
Mayo Clinic in Arizona
Scottsdale, Arizona, 85259, United States
Mayo Clinic in Florida
Jacksonville, Florida, 32224-9980, United States
University of Miami: Sylvester Comprehensive Cancer Center
Miami, Florida, 33136, United States
Winship Cancer Institute of Emory University
Atlanta, Georgia, 30322, United States
University of Iowa
Iowa City, Iowa, 52242, United States
Mayo Clinic
Rochester, Minnesota, 55902, United States
Washington University School of Medicine in St. Louis
St Louis, Missouri, 63110, United States
Weill Cornell Medical College
New York, New York, 10065, United States
University of Rochester Medical Center
Rochester, New York, 14642, United States
MD Anderson Cancer Center
Houston, Texas, 77030, United States
Related Links
Biospecimen
1. Blood Collection 2. DNA - Blood 3. Tumor DNA and RNA Extraction 4. Formalin Fixed Paraffin Embedded Tissue (FFPE) H\&E Slide 5. Tissue Microarrays (TMA) 6. Clinical Residual
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
James R Cerhan, MD,PhD
Mayo Clinic
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
August 3, 2021
First Posted
August 9, 2021
Study Start
August 16, 2021
Primary Completion (Estimated)
March 31, 2031
Study Completion (Estimated)
March 31, 2031
Last Updated
February 27, 2026
Record last verified: 2026-02
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL, SAP
- Time Frame
- Will become available upon publication
- Access Criteria
- Data sharing can occur only after going through group approvals.
Sharing of data can be requested through the LEO Cohort website.