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Showing 1–24 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Opinions Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Understanding Community Considerations, Opinions, Values, Impacts, and Decisions for COVID-19

NCT04373135
View directory record Official record
Conditions
Covid-19, Critical Illness, Attitude of Health Personnel, Attitude to Health, Health Behavior, Health Care Utilization
Interventions
Brief educational video
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
1,971 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Advancing the Role of the Neonatal Registered Dietitian Nutritionist

NCT06771778
View directory record Official record
Conditions
Opinions of the Neonatal Registered Dietitian
Interventions
Survey using a questionnaire.
Other
Lead sponsor
Florida International University
Other
Eligibility
Not listed
Enrollment
253 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 14, 2025 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Results available

Do Consumer Providers Enhance Recovery?

NCT00781079
View directory record Official record
Conditions
Mental Disorder
Interventions
Consumer Provider
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
Not listed
Enrollment
285 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
7
States / cities
Loma Linda, California • Long Beach, California • San Diego, California + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 10, 2018 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational

Second Opinions in Oncology

NCT05102500
View directory record Official record
Conditions
Breast Cancer, Pancreatic Cancer, Colorectal Cancer
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 100 Years
Enrollment
236 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational

Individualized Prediction of Migraine Attacks Using a Mobile Phone App and Fitbit

NCT02910921
View directory record Official record
Conditions
Migraine Disorders, Headache Disorders, Primary, Headache Disorders, Brain Diseases, Central Nervous System Diseases, Nervous System Diseases
Interventions
Not listed
Lead sponsor
Second Opinion Health
Industry
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
2
States / cities
Scottsdale, Arizona • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 5, 2018 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational

Patient Opinions Regarding General Anesthesia, Before and After Having Undergone a Procedure.

NCT05813262
View directory record Official record
Conditions
Anesthesia
Interventions
Not listed
Lead sponsor
Alabama College of Osteopathic Medicine
Other
Eligibility
21 Years and older
Enrollment
217 participants
Timeline
2022
U.S. locations
1
States / cities
Ashford, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 13, 2023 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

South Florida Residents Knowledge and Opinions on End-of-Life Issues

NCT01008241
View directory record Official record
Conditions
Death
Interventions
Paper questionnaire
Behavioral
Lead sponsor
Maria Isabel Fernandez
Other
Eligibility
18 Years and older
Enrollment
361 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
2
States / cities
Fort Lauderdale, Florida • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Jul 21, 2026, 5:32 PM EDT
Recruiting Not applicable Interventional

From Opinion to Evidence: Multi-site Evaluation of Custom Dynamic Orthosis Best Practices

NCT06352788
View directory record Official record
Conditions
Foot Injury
Interventions
Modular Carbon Fiber Custom Dynamic Orthosis (CDO), Mono Carbon Fiber Custom Dynamic Orthosis (CDO)
Device
Lead sponsor
Jason Wilken
Other
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
5
States / cities
San Diego, California • Iowa City, Iowa • Minneapolis, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Utilization of the Community Popular Opinion Leader (C-POL) Model in Alabama

NCT00260754
View directory record Official record
Conditions
Risk Behavior, Sexually Transmitted Diseases
Interventions
Community-Popular Opinion Leader Model, Diffusion of Innovations
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 30, 2006 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

ADAPT-POL New Orleans: Adaptation of Prevention Techniques With Popular Opinion Leader

NCT00252109
View directory record Official record
Conditions
HIV Infections
Interventions
Popular Opinion Leader
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older · Male only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2009
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Aug 15, 2012 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating a Physician Opinion Leader Intervention to Increase Utilization of Coaching/Therapy During Residency

NCT05499468
View directory record Official record
Conditions
Workplace Culture, Help-Seeking Behavior, Social Stigma, Education, Medical, Continuing
Interventions
Popular-Opinion Leader-led encouragement during training meetings and informal conversation
Other
Lead sponsor
Stanford University
Other
Eligibility
Not listed
Enrollment
493 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Nov 22, 2022 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Community-Based Intervention With Popular Opinion Leaders (C-POL) in Texas

NCT00260715
View directory record Official record
Conditions
Risk Behavior, Sexually Transmitted Diseases
Interventions
Community-Popular Opinion Leader Model, Diffusion of Innovations
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Dec 1, 2005 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational

Optivol Diagnostic Data for Discharge in Heart Failure

NCT00420108
View directory record Official record
Conditions
Heart Failure, Congestive, Cardiac Pacemaker, Artificial
Interventions
Not listed
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
5
States / cities
Saint Joseph, Missouri • Elmer, New Jersey • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2010 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ADAPT-POL: Planned Parenthood Center of El Paso Adopting and Demonstrating the Adaptation of Prevention Techniques

NCT00252083
View directory record Official record
Conditions
HIV Infections
Interventions
Popular Opinion Leader
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older · Male only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
El Paso, Texas
Source: ClinicalTrials.gov public record
Updated Apr 4, 2012 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The TRAIN Study: A Concussion Prevention Strategy in Middle Schools

NCT04841473
View directory record Official record
Conditions
Concussion, Brain
Interventions
TRAIN Concussion Education, Standard Concussion Education
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 14, 2021 · Synced Jul 21, 2026, 5:32 PM EDT
Withdrawn Not applicable Interventional

Video-based Consensus Opinion for Hand and Upper Extremity Problems

NCT02204605
View directory record Official record
Conditions
Pain
Interventions
Video-based Consensus Opinion
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 21, 2016 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Phase 1Phase 2 Interventional

Study of RM-1929 and Photoimmunotherapy in Patients With Recurrent Head and Neck Cancer

NCT02422979
View directory record Official record
Conditions
Recurrent Head and Neck Cancer
Interventions
PIT: 50 J/cm^2 for superficial lesions or 100 J/cm for interstitial lesions and Drug RM-1929: 160 mg/m^2, PIT: 50 J/cm^2 for superficial lesions or 100 J/cm for interstitial lesions and Drug RM-1929: 320 mg/m^2, PIT: 50 J/cm^2 for superficial lesions or 100 J/cm for interstitial lesions and Drug RM-1929: 640 mg/m^2, PIT: 75 J/cm^2 for superficial lesions or 150 J/cm for interstitial lesions and Drug RM-1929: 640mg/m^2, PIT: 100 J/cm^2 for superficial lesions or 200 J/cm for interstitial lesions and Drug RM-1929: 640mg/m^2, PIT: 50 J/cm^2 for superficial lesions or 100 J/cm for interstitial lesions and Drug RM-1929: 640mg/m^2
Combination Product
Lead sponsor
Rakuten Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
7
States / cities
San Francisco, California • Denver, Colorado • Chicago, Illinois + 4 more
Source: ClinicalTrials.gov public record
Updated Feb 25, 2020 · Synced Jul 21, 2026, 5:32 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Anesthesiologist Perspectives/Opinions/Ethics on Intraoperative/Intraprocedural Code Status and Intraoperative/Intraprocedural Code Status Management Plans

NCT05883228
View directory record Official record
Conditions
Physician's Role, Opinions
Interventions
Not listed
Lead sponsor
Joseph Hendrix
Other
Eligibility
Not listed
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 31, 2023 · Synced Jul 21, 2026, 5:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Oral Cancer Screening Among Nursing Home Dentists in Ohio

NCT00526851
View directory record Official record
Conditions
Head and Neck Cancer
Interventions
survey administration
Other
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Not listed
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 4, 2014 · Synced Jul 21, 2026, 5:32 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Vaccine Hesitancy in Black/African Americans With Rheumatic Diseases

NCT05822219
View directory record Official record
Conditions
Rheumatic Diseases, COVID-19 Vaccine, COVID-19, SLE
Interventions
COVID-19 vaccine and booster training, and importance
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Results available

Contrast-Enhanced Mammography for Breast Cancer Staging in Patients Referred for a Second Opinion

NCT05036083
View directory record Official record
Conditions
Breast Carcinoma, Invasive Breast Carcinoma
Interventions
Contrast-Enhanced Mammography, Digital Tomosynthesis Mammography, Electronic Health Record Review, Iodinated Contrast Agent
Procedure · Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Jul 21, 2026, 5:32 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Identifying Student Opinion Leaders to Lead E-cigarette Interventions

NCT04083469
View directory record Official record
Conditions
E-Cig Use, Adolescent Behavior
Interventions
Peer-Led Peer-Elected Intervention, Adult-Led Intervention, Peer-Led Non-Elected Intervention
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
Not listed
Enrollment
686 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 6, 2020 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional

Patients' Opinions and Responses to the National Cancer Institute's Colorectal Cancer Risk Assessment Tool

NCT01803009
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Patient views NCI CRC RAT, View presentation regarding current chance of having an advanced adenoma
Behavioral
Lead sponsor
Indiana University
Other
Eligibility
50 Years to 75 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 2, 2014 · Synced Jul 21, 2026, 5:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Parent Key Opinion Leaders to Increase Demand of Effective Treatments for Youth Anxiety

NCT04929262
View directory record Official record
Conditions
Anxiety Disorders
Interventions
Supporting Anxious Youth: Strategies for Caregivers
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years and older
Enrollment
301 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 22, 2023 · Synced Jul 21, 2026, 5:32 PM EDT