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ClinicalTrials.gov public records Last synced Oct 17, 2026, 11:32 AM EDT

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

Showing 25–48 of 4,385 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Observational Study Clear all
Recruiting No phase listed Observational

Ultrasound-Guided Core Needle Biopsy to Stage Urothelial Carcinoma of the Bladder (US UCB)

NCT07029256
View directory record Official record
Conditions
Bladder Urothelial Carcinoma
Interventions
Non-Interventional Study
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Withdrawn No phase listed Observational

Patients Who Receive 131 I-MIBG

NCT04770831
View directory record Official record
Conditions
Brain and Nervous System
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
1 Year to 30 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 14, 2022 · Synced Oct 17, 2026, 11:32 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Auditory EEG and Behavioral Assessments in Individuals With Rett Syndrome

NCT07569445
View directory record Official record
Conditions
Rett Syndrome
Interventions
Electroencephalogram (EEG) Recording
Procedure
Lead sponsor
University of Rochester
Other
Eligibility
2 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Oct 17, 2026, 11:32 AM 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 17, 2026, 11:32 AM EDT
Terminated Phase 2 Interventional

A Study of SerpinPC in Participants with Hemophilia B (HemB) with Inhibitors

NCT05789537
View directory record Official record
Conditions
Hemophilia B with Inhibitor, Hemophilia B
Interventions
SerpinPC
Drug
Lead sponsor
ApcinteX Ltd
Industry
Eligibility
12 Years to 65 Years · Male only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
3
States / cities
Aurora, Colorado • Tampa, Florida • Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 11, 2025 · Synced Oct 17, 2026, 11:32 AM EDT
Completed Phase 4 Interventional

Hyperpolarized Imaging for New Treatments

NCT04259970
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Initiation of CFTR Modulator
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Years to 18 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
3
States / cities
Cincinnati, Ohio • Charlottesville, Virginia • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed No phase listed Observational

Incidence and Predictors of Opioid Overdose and Death Among Long-Term Users of Opioid Analgesics

NCT02662153
View directory record Official record
Conditions
Opioid Overdose
Interventions
Observation only
Other
Lead sponsor
Member Companies of the Opioid PMR Consortium
Industry
Eligibility
18 Years to 79 Years
Enrollment
808,455 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
4
States / cities
Wilmington, Delaware • Boston, Massachusetts • Portland, Oregon + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2022 · Synced Oct 17, 2026, 11:32 AM EDT
Active, not recruiting No phase listed Observational

A Central Preservation and Assessment Service to Optimize Donor Kidney Allocation

NCT06263023
View directory record Official record
Conditions
Organ Preservation
Interventions
Sub-Normothermic Machine Preservation and Assessment
Other
Lead sponsor
34 Lives, PBC
Industry
Eligibility
16 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
8
States / cities
Chicago, Illinois • Indianapolis, Indiana • St Louis, Missouri + 4 more
Source: ClinicalTrials.gov public record
Updated Apr 2, 2025 · Synced Oct 17, 2026, 11:32 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

LiveSMART Trial to Prevent Falls in Patients With Cirrhosis - Supplementary Study

NCT07140120
View directory record Official record
Conditions
Cirrhosis, Liver, Portal Hypertension
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
3
States / cities
Ann Arbor, Michigan • Philadelphia, Pennsylvania • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed No phase listed Observational

Continuous Activity Monitoring During Fractionated Radiotherapy in Patients With Head and Neck, Lung, or Gastrointestinal Cancer

NCT02649569
View directory record Official record
Conditions
Digestive System Carcinoma, Head and Neck Carcinoma, Lung Carcinoma
Interventions
Monitoring Device, Quality-of-Life Assessment
Device · Other
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
2
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Not listed No phase listed Observational

Observational Study to Investigate the Melatonin and Cortisol Circadian Rhythms of Individuals With Smith-Magenis Syndrome (SMS)

NCT02180451
View directory record Official record
Conditions
Smith Magenis Syndrome
Interventions
Not listed
Lead sponsor
Vanda Pharmaceuticals
Industry
Eligibility
6 Years to 50 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 25, 2016 · Synced Oct 17, 2026, 11:32 AM EDT
Recruiting No phase listed Observational

Understanding New Cachexia Subtypes Through Observational Epidemiological Research

NCT07776353
View directory record Official record
Conditions
Advanced Colorectal Carcinoma, Advanced Lung Non-Small Cell Carcinoma, Advanced Pancreatic Adenocarcinoma, Stage IV Colorectal Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IV Pancreatic Cancer AJCC v8, Unresectable Colorectal Carcinoma, Unresectable Lung Non-Small Cell Carcinoma
Interventions
Biospecimen Collection, Computed Tomography, Electronic health record review, Medical Device Usage and Evaluation, Physical functions assessments, Positron Emission Tomography (PET), Survey Administration
Procedure · Other
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Pleasanton, California
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed No phase listed Observational

Axium™ MicroFX™ for Endovascular Repair of IntraCranial Aneurysm-A Multicenter Study

NCT01323439
View directory record Official record
Conditions
Aneurysm
Interventions
Axium™ MicroFX™ PGLA COILS
Device
Lead sponsor
Medtronic Neurovascular Clinical Affairs
Industry
Eligibility
18 Years to 90 Years
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 30, 2017 · Synced Oct 17, 2026, 11:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Usability Evaluation of the Intelligent Fingerprinting Drug Screening System

NCT07758777
View directory record Official record
Conditions
Healthy Adult Participants
Interventions
Diagnostic procedures, Drug Screening
Diagnostic Test · Device
Lead sponsor
Intelligent Bio Solutions Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Marlton, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed Phase 2 Interventional

A Study of Three Anti-HIV Drug Combinations in Patients Who Have Taken Amprenavir

NCT00001095
View directory record Official record
Conditions
HIV Infections
Interventions
Indinavir sulfate, Amprenavir, Nevirapine, Lamivudine, Stavudine, Zidovudine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1999
U.S. locations
12
States / cities
Los Angeles, California • Denver, Colorado • Miami, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Oct 17, 2026, 11:32 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Impact of "Teaching the Teachers" Concept on Global Education and Application of Hepatocellular Carcinoma Diagnosis Guidelines

NCT05143619
View directory record Official record
Conditions
Hepatocellular Carcinoma
Interventions
Survey Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed No phase listed Observational

Long-term Recovery: Longitudinal Study of Neuro-behavioral Markers of Recovery and Precipitants of Relapse

NCT04788004
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Online survey
Other
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
18 Years and older
Enrollment
733 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Collecting Data on Retinal Blood Blood Flow and Blood Vessel Shape/Appearance Using an Investigational Device, XyCAM CRE, and to Then Compare Those Images With Images Collected From a Patient's Routine Clinical Examination.

NCT07641738
View directory record Official record
Conditions
Microvascular Disease, Retinal Disease
Interventions
XyCAM CRE Imaging
Device
Lead sponsor
Stuart Terry Eye Associates
Other
Eligibility
21 Years to 100 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Recruiting No phase listed Observational

A Global, Multicenter Study to Assess Maternal, Fetal and Infant Outcomes of Exposure to Palynziq® (Pegvaliase) During Pregnancy and Breastfeeding

NCT05579548
View directory record Official record
Conditions
Phenylketonuria, Maternal
Interventions
Pegvaliase
Drug
Lead sponsor
BioMarin Pharmaceutical
Industry
Eligibility
Female only
Enrollment
50 participants
Timeline
2022 – 2032
U.S. locations
1
States / cities
Wilmington, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Lung Cancer Risk Assessment and Etiology

NCT06328621
View directory record Official record
Conditions
Lung Carcinoma
Interventions
Biospecimen Collection, Computed Tomography, Electronic Health Record Review, Survey Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Terminated No phase listed Observational

Surveillance of Patients With Adenocarcinoma of the Gastroesophageal Junction or Esophagus

NCT02991547
View directory record Official record
Conditions
Adenocarcinoma Esophagus
Interventions
Observational
Other
Lead sponsor
The Guthrie Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
2
States / cities
Corning, New York • Sayre, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 13, 2024 · Synced Oct 17, 2026, 11:32 AM EDT
Not listed No phase listed Observational

Is My Sleep Tracker Tracking my Sleep?

NCT06174558
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Sleep Tracking Devices
Device
Lead sponsor
Respiratory Specialists
Other
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Wyomissing, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 19, 2024 · Synced Oct 17, 2026, 11:32 AM EDT
Recruiting No phase listed Observational

Assessment of the Psychosocial Impact of the COVID-19 Pandemic on the MD Anderson Cancer Center Workforce

NCT04491292
View directory record Official record
Conditions
COVID-19 Infection
Interventions
Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
20,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Oct 17, 2026, 11:32 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

DNA Methylation in Adenocarcinoma of the Prostate: Analysis of Validated Biomarkers in Urine

NCT06347809
View directory record Official record
Conditions
Prostate Adenocarcinoma, Prostate Carcinoma
Interventions
Non-Interventional Study
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 17, 2026, 11:32 AM EDT