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ClinicalTrials.gov public records Last synced Jul 22, 2026, 2:29 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Epidemiology Clear all
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Firearm-Safety Counseling: Medical Student Training

NCT05242627
View directory record Official record
Conditions
Medical Student Firearm Epidemiology Knowledge, Medical Student Firearm Safety Knowledge, Medical Student Initiated Clinical Firearm Safety Counseling
Interventions
Clinical Firearm Safety Counseling Module
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Results available

To Estimate the Efficacy of Treatment With TNFi as Monotherapy or Combination Therapy With MTX and Compare and Contrast Efficacy With Tofacitinib as Monotherapy and Combination Therapy in a Real World Setting.

NCT05576051
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
patterns of use of combination therapy and monotherapy
Other
Lead sponsor
Pfizer
Industry
Eligibility
Not listed
Enrollment
9,159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

Respiratory Viral Infections in Pediatric Transplantation

NCT02260596
View directory record Official record
Conditions
Infection in Solid Organ Transplant Recipients, Complications of Organ Transplant, Respiratory Viral Infection
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
Up to 18 Years
Enrollment
2,669 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Jul 22, 2026, 2:29 PM EDT
Withdrawn Not applicable Interventional

VA Diabetes Prevention: Epidemiology of Pre-Diabetes and Implementation Pilot

NCT01671735
View directory record Official record
Conditions
Diabetes
Interventions
Survey
Other
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 14, 2012 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Epidemiology of H. Pylori Transmission

NCT02740140
View directory record Official record
Conditions
Communicable Diseases
Interventions
Not listed
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 55 Years
Enrollment
1,750 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
2
States / cities
San Jose, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

COVID-19 Pregnancy Related Immunological, Clinical and Epidemiological Factors and Perinatal Outcomes

NCT04659759
View directory record Official record
Conditions
Covid19
Interventions
COVID-19 exposure, COVID-19 vaccine
Other · Biological
Lead sponsor
Thomas Jefferson University
Other
Eligibility
Female only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

Validation of Self-Reported Needle Sharing Among Injection Drug Users

NCT00341081
View directory record Official record
Conditions
Viral Infection
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
442 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 24, 2011 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Walnut Consumption and Diabetes Risk

NCT03224533
View directory record Official record
Conditions
Diabetes Mellitus
Interventions
Diabetes Outcome
Diagnostic Test
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 80 Years
Enrollment
34,121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 20, 2017 · Synced Jul 22, 2026, 2:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intervention Study to Increase Smoking Cessation Rates Among Public Housing Residents

NCT01651611
View directory record Official record
Conditions
Tobacco Cessation
Interventions
Motivational interviewing, Smoking cessation counseling, Navigation to smoking cessation resources, Social support
Behavioral
Lead sponsor
Boston University
Other
Eligibility
18 Years to 79 Years
Enrollment
330 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 28, 2016 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

A Case-Referent Study of Brain Tumors in Adults

NCT00339300
View directory record Official record
Conditions
Brain Tumors
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 90 Years
Enrollment
1,581 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

Maternal and Umbilical Cord Hormone Concentrations in Twin and Singleton Pregnancies

NCT00341263
View directory record Official record
Conditions
Normal Pregnancy
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 60 Years · Female only
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2020
U.S. locations
1
States / cities
Hanover, New Hampshire
Source: ClinicalTrials.gov public record
Updated Feb 20, 2020 · Synced Jul 22, 2026, 2:29 PM EDT
Withdrawn Phase 4 Interventional

Epidemiology and Treatment of Small-colony Variant Staphylococcus Aureus in Cystic Fibrosis

NCT02547116
View directory record Official record
Conditions
Cystic Fibrosis, MRSA
Interventions
Rifampin
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
12 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

Evaluation of HIV-Negative Patients With Low CD4+ T Lymphocyte Counts

NCT00001319
View directory record Official record
Conditions
CD4 Lymphocytopenia, Idiopathic CD4 Positive T Lymphocytopenia
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 22, 2026, 2:29 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

PRECISION Pain Research Registry

NCT04853732
View directory record Official record
Conditions
Chronic Low Back Pain
Interventions
Not listed
Lead sponsor
University of North Texas Health Science Center
Other
Eligibility
21 Years to 79 Years
Enrollment
10,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2030
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Jul 22, 2026, 2:29 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Post Pandemic Pneumococcal Carriage Among Children and Adults

NCT06373328
View directory record Official record
Conditions
Pneumococcal Carriage
Interventions
Not listed
Lead sponsor
University of Central Florida
Other
Eligibility
7 Months and older
Enrollment
900 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational

Genetics of Familial Testicular Cancer

NCT00342537
View directory record Official record
Conditions
Testicular Cancer
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
4 Years to 100 Years · Male only
Enrollment
1,842 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 16, 2020 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Health and Cancer Issues in the South Asian Community

NCT00479830
View directory record Official record
Conditions
Attitude to Health
Interventions
Focus Groups, Questionnaire, Interview
Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 12, 2016 · Synced Jul 22, 2026, 2:29 PM EDT
Active, not recruiting No phase listed Observational

Healthy Aging in Neighborhoods of Diversity Across the Life Span (HANDLS)

NCT01323322
View directory record Official record
Conditions
Diabetes, Cerebrovascular Disease, Age-Associated Decline, Cardiovascular Disease
Interventions
Not listed
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
30 Years to 64 Years
Enrollment
3,720 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Examining the Relationship Between Hormone Therapy (HT) and Cognitive Function (The WHIMS-ECHO Study)

NCT00745056
View directory record Official record
Conditions
Dementia
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years and older · Female only
Enrollment
2,922 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 3, 2023 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of Silicone-Associated Connective Tissue Diseases

NCT00001330
View directory record Official record
Conditions
Autoimmune Diseases, Connective Tissue Diseases, Scleroderma, Circumscribed, Scleroderma, Systemic
Interventions
Not listed
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 22, 2026, 2:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Prospective, Epidemiological Study to Assess the Disease Burden of Respiratory Syncytial Virus Associated, Suspected Lower Respiratory Tract Infections in Newborns, From 0 to 2 Years of Age and Risk of Development of Wheeze and Asthma From 0 to 6 Years of Age

NCT01995175
View directory record Official record
Conditions
Respiratory Syncytial Virus
Interventions
Nasal swab sampling, Blood sampling, Diary cards
Procedure · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
Up to 6 Years
Enrollment
2,409 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2021
U.S. locations
9
States / cities
Oakland, California • Sacramento, California • Santa Clara, California + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2022 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Service and Health During the Iraq and Afghanistan Era

NCT01987401
View directory record Official record
Conditions
Iraq and Afghanistan Era Veterans
Interventions
Not listed
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
Not listed
Enrollment
1,242 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
2
States / cities
Boston, Massachusetts • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 11, 2018 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Results available

Retrospective, Non-interventional Natural History of Patients With Juvenile-onset Hypophosphatasia (HPP)

NCT02104219
View directory record Official record
Conditions
Hypophosphatasia (HPP)
Interventions
Not listed
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
5 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
9
States / cities
Atlanta, Georgia • Indianapolis, Indiana • Boston, Massachusetts + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 31, 2019 · Synced Jul 22, 2026, 2:29 PM EDT
Completed No phase listed Observational Results available

A Retrospective Study of the Natural History of Patients With Severe Perinatal and Infantile Hypophosphatasia (HPP)

NCT01419028
View directory record Official record
Conditions
Hypophosphatasia (HPP)
Interventions
Not listed
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
Not listed
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
5
States / cities
Los Angeles, California • Indianapolis, Indiana • St Louis, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 31, 2019 · Synced Jul 22, 2026, 2:29 PM EDT