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ClinicalTrials.gov public records Last synced Oct 19, 2026, 1:40 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 433–456 of 4,385 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: observational study Clear all
Enrolling by invitation No phase listed Observational

A 90 Day Observational Study as an Extension to the Phase 3,Open Labeled Exploratory Study of RELiZORB

NCT05635747
View directory record Official record
Conditions
Short Bowel Syndrome, Malabsorption
Interventions
Relizorb Enzyme Cartridge
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
2 Years to 18 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
2
States / cities
Los Angeles, California • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Results available

An Observational Study Evaluating SYMLIN® (Pramlintide Acetate) Injection Use in Insulin Using Patients With Type 2 and Type 1 Diabetes

NCT00229658
View directory record Official record
Conditions
Type 1 Diabetes Mellitus, Type 2 Diabetes Mellitus
Interventions
pramlintide acetate
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
1,297 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
107
States / cities
Birmingham, Alabama • Montgomery, Alabama • Tucson, Arizona + 104 more
Source: ClinicalTrials.gov public record
Updated Mar 25, 2015 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Results available

Retrospective Cohort Study of Rebif® Use in Pediatric Multiple Sclerosis (MS) Subjects (REPLAY)

NCT01207648
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Rebif®
Drug
Lead sponsor
EMD Serono
Industry
Eligibility
Up to 18 Years
Enrollment
307 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated May 15, 2015 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

HIFU for Focal Ablation of Prostate Tissue: An Observational Study

NCT03620786
View directory record Official record
Conditions
Prostate Cancer
Interventions
Sonablate HIFU device
Device
Lead sponsor
University of California, Los Angeles
Other
Eligibility
40 Years to 85 Years · Male only
Enrollment
100 participants
Timeline
2018 – 2028
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

A Real-world, Prospective Observational Study of Rimegepant ODT for the Acute Treatment of Migraine Attacks in Adults.

NCT06467370
View directory record Official record
Conditions
Migraine
Interventions
Not listed
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
467 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Results available

A Retrospective Chart Review Study of Patients With CLAD-BOS Post Lung Transplantation

NCT06503770
View directory record Official record
Conditions
Bronchiolitis Obliterans Syndrome
Interventions
Not listed
Lead sponsor
Zambon SpA
Industry
Eligibility
18 Years and older
Enrollment
284 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
3
States / cities
Cleveland, Ohio • Columbus, Ohio • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

Genotype and Phenotype Correlation in Hereditary Thrombotic Thrombocytopenic Purpura (Upshaw-Schulman Syndrome)

NCT01257269
View directory record Official record
Conditions
Thrombotic Thrombocytopenic Purpura, Congenital Thrombotic Thrombocytopenic Purpura, Familial Thrombotic Thrombocytopenic Purpura, Thrombotic Thrombocytopenic Purpura, Congenital, Upshaw-Schulman Syndrome
Interventions
Observation
Other
Lead sponsor
Insel Gruppe AG, University Hospital Bern
Other
Eligibility
Not listed
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2030
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Antibiotic Administration and Blood Culture Positivity in Severe Sepsis and Septic Shock

NCT01867905
View directory record Official record
Conditions
Severe Sepsis, Septic Shock, Bacteremia
Interventions
Not listed
Lead sponsor
University of British Columbia
Other
Eligibility
18 Years and older
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 16, 2019 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

E-Cigarettes: Dynamic Patterns of Use and Health Effects

NCT02527980
View directory record Official record
Conditions
Smoking, Nicotine Dependence
Interventions
No intervention: observation only
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 99 Years
Enrollment
422 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 10, 2019 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 2 Interventional

A Phase II Study for p16+ Oropharyngeal Cancer PerSonalized De-escalation Treatment at University of MIchigan (CuSToMIze)

NCT05894083
View directory record Official record
Conditions
Oropharyngeal Cancer, Squamous Cell Carcinoma of the Oropharynx
Interventions
Surgery, Chemoradiation, Observation, Post-operative radiation
Procedure · Combination Product · Other + 1 more
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Withdrawn Phase 1Phase 2 Interventional

Medical Versus Surgical Management of Moderate Mitral Regurgitation Following Percutaneous Coronary Intervention

NCT01156441
View directory record Official record
Conditions
Myocardial Infarction, Mitral Regurgitation
Interventions
surgical mitral valve repair w/ mitral valve annuloplasty
Procedure
Lead sponsor
Southern Illinois University
Other
Eligibility
19 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Springfield, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 16, 2014 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

An Observational Study in Participants With Indolent Systemic Mastocytosis (ISM)

NCT07264959
View directory record Official record
Conditions
Indolent Systemic Mastocytosis
Interventions
Not listed
Lead sponsor
Blueprint Medicines Corporation
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
7
States / cities
Aurora, Colorado • Normal, Illinois • Wheaton, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Observational Study of Surgical Treatment of Necrotizing Enterocolotis

NCT01223261
View directory record Official record
Conditions
Infant, Newborn, Infant, Low Birth Weight, Infant, Small for Gestational Age, Infant, Premature, Enterocolitis, Necrotizing, Intestinal Perforation
Interventions
Not listed
Lead sponsor
NICHD Neonatal Research Network
Network
Eligibility
Up to 6 Weeks
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
17
States / cities
Birmingham, Alabama • Palo Alto, California • San Diego, California + 13 more
Source: ClinicalTrials.gov public record
Updated Mar 22, 2019 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

Investigating Memory and Physical Activity After Cancer Treatment in Survivors of Adolescent and Young Adult Cancers

NCT06880861
View directory record Official record
Conditions
Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Interventions
Non-Interventional Study
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed Phase 4 Interventional Results available

Ideal Steroids for Asthma Treatment in the PICU

NCT03900624
View directory record Official record
Conditions
Asthma Childhood
Interventions
Dexamethasone
Drug
Lead sponsor
Johns Hopkins All Children's Hospital
Other
Eligibility
5 Years to 17 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Feb 23, 2024 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Cannabis Use Patterns Among Cancer Patients

NCT05132842
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Malignant Solid Neoplasm
Interventions
Survey Administration
Other
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
1,568 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Peri-operative NIRS Monitoring In Infants

NCT02442141
View directory record Official record
Conditions
Anesthesia
Interventions
Not listed
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
Up to 6 Months
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 15, 2018 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Factors Affecting Patient Participation in AIDS Malignancy Clinical Trials Consortium Clinical Trials

NCT01946217
View directory record Official record
Conditions
HIV Infection, Malignant Neoplasm, Precancerous Condition
Interventions
questionnaire administration
Other
Lead sponsor
AIDS Malignancy Consortium
Network
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
14
States / cities
Los Angeles, California • Chicago, Illinois • New Orleans, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2016 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 3 Interventional

Ropivacaine and Fentanyl for Labor Epidural Initiation

NCT07076368
View directory record Official record
Conditions
Pregnancy, Labor and Delivery, Labor Analgesia
Interventions
Ropivacaine + Fentanyl
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of Raised End-Tidal pCo2 on Choroidal Volume

NCT06275308
View directory record Official record
Conditions
Intraocular Pressure
Interventions
Ventilation manipulation
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
Up to 8 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 9, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Lung HIV Microbiome Project (Michigan Site)

NCT02392182
View directory record Official record
Conditions
Healthy Participants, Tobacco Use Disorder, Human Microbiome
Interventions
Fiberoptic bronchoscopy
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 80 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 16, 2016 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Study of Pediatric Migraine: The Pediatric Migraine Registry

NCT03742024
View directory record Official record
Conditions
Migraine
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
4 Years to 17 Years
Enrollment
201 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
19
States / cities
San Francisco, California • Colorado Springs, Colorado • Wilmington, Delaware + 16 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2021 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Hormones, Outcomes, and Pain Pathways in Exercise Study

NCT07579182
View directory record Official record
Conditions
Breast Pain, Mastalgia, Back Pain, Back Pain, Low, Neck Pain, Chest Pain, Activity, Motor, Healthy Aging, Weight, Body, Inflammation, Gonadal Steroid Hormones, Neuronal Plasticity, Neuromuscular Manifestations
Interventions
Interventional Sports bra
Other
Lead sponsor
University of Houston
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Observational, Long-term Extension Study for Participants of Prior VY-AADC01 Studies

NCT03733496
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
Neurocrine Biosciences
Industry
Eligibility
40 Years and older
Enrollment
14 participants
Timeline
2018 – 2023
U.S. locations
3
States / cities
San Francisco, California • Atlanta, Georgia • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 22, 2023 · Synced Oct 19, 2026, 1:40 PM EDT