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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Control message exposure Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Controlled Trial of iTAB Plus Motivational Interviewing for PrEP Adherence in Transgender Individuals

NCT03086200
View directory record Official record
Conditions
Patient Adherence, HIV Seronegativity
Interventions
brief Motivational Interviewing
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
263 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
5
States / cities
Los Angeles, California • San Diego, California • Torrance, California
Source: ClinicalTrials.gov public record
Updated Sep 12, 2021 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Trial of a Social Marketing Campaign to Increase HPV Vaccination Among Mexican American Children

NCT02697396
View directory record Official record
Conditions
HPV Vaccination
Interventions
Assessments, Text Message Reminder, No Text Messaging
Behavioral · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years and older
Enrollment
181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed No phase listed Observational

The Feasibility of Text Messaging to Assess Secondhand Smoke Exposure Among Youngsters With Cancer or Sickle Cell Disease

NCT01591187
View directory record Official record
Conditions
Cancer, Sickle Cell Disease
Interventions
Text messaging, Questionnaire, Interviews
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
10 Years to 17 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 4, 2015 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Results available

Can Exposure to Brief Messages Correct Misperceptions?

NCT05129592
View directory record Official record
Conditions
Beliefs
Interventions
Coherent corrective messages
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
21 Years to 99 Years
Enrollment
193 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 11, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Not yet recruiting Not applicable Interventional

Keep Social Randomized Controlled Trial for Young Adults With Cancer

NCT07788339
View directory record Official record
Conditions
Cancer
Interventions
Social connectedness intervention
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
22 Years to 39 Years
Enrollment
395 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Messaging Strategies to Reduce Breast Cancer Over-screening in Older Women

NCT05821023
View directory record Official record
Conditions
Breast Cancer Screening
Interventions
messages
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
65 Years and older · Female only
Enrollment
4,173 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 13, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional

Testing New Marketing Models for Improved Cookstoves - Uganda

NCT01611350
View directory record Official record
Conditions
Air Pollution, Indoor, Behavior
Interventions
RCT 1- Testing the Effectiveness of Marketing Messages in Increasing Willingness to Pay, RCT 3-Measure the Effects of Fuel Efficient Cookstoves on Health, Fuel Use and Time Spent Collecting Fuel, RCT 2- Testing the Effectiveness of the Novel Sales Offer and its ability to Increase Uptake of Purchasing Energy Efficient Cookstoves
Other
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years and older · Female only
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Feb 27, 2020 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Results available

Messages About Reduced Nicotine in Combusted Tobacco Products

NCT05506046
View directory record Official record
Conditions
Health Communication, Smoking, Smoking, Tobacco, Smoking Behaviors, Risk Behavior
Interventions
Reduced nicotine message exposure, Modified risk message exposure, Combined message exposure (reduced nicotine + modified risk), Control message exposure
Behavioral
Lead sponsor
Georgia State University
Other
Eligibility
18 Years and older
Enrollment
1,901 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 27, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Birth to Three - Cavity Free

NCT05756413
View directory record Official record
Conditions
Caries,Dental
Interventions
Self-determination theory
Behavioral
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 45 Years
Enrollment
1,268 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
16
States / cities
Anamosa, Iowa • Belle Plaine, Iowa • Cedar Rapids, Iowa + 11 more
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Strategies to Reduce Addiction Stigma Among Health Professionals

NCT05127707
View directory record Official record
Conditions
Opioid Use Disorder, Substance Use Disorders, Stigma, Social
Interventions
Words Matter - Visual Campaign, Words Matter - Visual Campaign & Narrative Vignette (Messenger: Person with Opioid Use Disorder) Experimental: Words Matter - Visual Campaign & Narrative Vignette (Messenger: Clinician), Words Matter - Visual Campaign & Narrative Vignette (Messenger: Clinician), Words Matter - Visual Campaign & Narrative Vignette (Messenger: Health System Administrator), Medication Treatment for Opioid Use Disorder Works - Visual Campaign, Medication Treatment for Opioid Use Disorder Works - Visual Campaign & Narrative Vignette (Messenger: Person with Opioid Use Disorder), Medication Treatment for Opioid Use Disorder Works - Visual Campaign & Narrative Vignette (Messenger: Clinician), Medication Treatment for Opioid Use Disorder Works - Visual Campaign & Narrative Vignette (Messenger: Health System Administrator)
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years and older
Enrollment
1,842 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 18, 2021 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Digital Media for Cancer Control (to Prevent Vaping and Smoking Behavior)

NCT04867668
View directory record Official record
Conditions
Tobacco Use
Interventions
Anti-vaping and anti-smoking digital advertising
Behavioral
Lead sponsor
George Washington University
Other
Eligibility
18 Years to 24 Years
Enrollment
2,800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating Body Acceptance Programs for Young Men

NCT04687228
View directory record Official record
Conditions
Body Image Disturbance, Eating Disorder Symptom, Dysmorphia, Eating Disorders
Interventions
More than Muscles (MTM), Media Advocacy (MA)
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
137 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 1, 2022 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Evaluation of Adherence to Topical Agents: Applying Communication Technology to Improve Sunscreen Use

NCT00535769
View directory record Official record
Conditions
Skin Cancer
Interventions
Electronic + no text message, Electronic monitor + text messages
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 19, 2012 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Public Messaging to Increase Treatment Seeking for Veterans at Risk for Suicide

NCT04784663
View directory record Official record
Conditions
Mental Health, Suicide
Interventions
Messaging, Wait list control
Behavioral · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 89 Years
Enrollment
355 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Canandaigua, New York
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Whack-a-Mole: Testing an Intervention to Increase Melanoma Identification

NCT04069104
View directory record Official record
Conditions
Diagnoses Disease
Interventions
ABCD Information, UDS information, Standard (clinical) feedback, Motivational feedback
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
1,849 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated Oct 24, 2021 · Synced Sep 5, 2026, 10:23 PM EDT
Enrolling by invitation Not applicable Interventional

Primary Care Referrals to a Remotely Delivered Physical Activity Intervention for Latina Teens: Chicas Fuertes 2

NCT06595056
View directory record Official record
Conditions
Physical Activity
Interventions
Multi-technology MVPA intervention
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
13 Years to 17 Years · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Phase 2 Interventional

Selective Exposure in HIV Prevention

NCT01152281
View directory record Official record
Conditions
HIV Infections
Interventions
Maximal Control, Instrumental and Empowering, Minimal Control, Instrumental, Empowering
Behavioral
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 35 Years
Enrollment
722 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 16, 2018 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Breast Cancer Study Tracking Risk Awareness of Alcohol Consumption and Improving Knowledge in Young Adult Women

NCT07320664
View directory record Official record
Conditions
Behavior, Risk
Interventions
Alcohol and Breast Cancer Risk Messages, Skin Cancer Risk Messages
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

PrEPsmart 2-1-1 Pilot

NCT06631365
View directory record Official record
Conditions
HIV-1-infection
Interventions
PrEPsmart mobile app, Truvada
Device · Drug
Lead sponsor
Public Health Foundation Enterprises, Inc.
Other
Eligibility
18 Years and older · Male only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PACE Vape Messaging Study

NCT04450537
View directory record Official record
Conditions
Vaping, E-cigarette Use, Electronic Cigarette Use
Interventions
Vape Messaging Intervention
Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
18 Years to 24 Years
Enrollment
569 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effectiveness and Implementation of Text Messaging to Improve HIV Testing in Adolescents

NCT06096519
View directory record Official record
Conditions
HIV
Interventions
Information, motivation, behavioral skills treatment arm, Information only control arm
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
13 Years to 19 Years
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Intervention to Enhance PrEP Persistence

NCT06872307
View directory record Official record
Conditions
HIV Prevention, HIV Infection Primary
Interventions
RAMP-It-Up Initiation, Adherence, and Retention Intervention
Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years and older · Male only
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
3
States / cities
Washington D.C., District of Columbia • Jackson, Mississippi • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Mar 11, 2025 · Synced Sep 5, 2026, 10:23 PM EDT
Terminated Phase 4 Interventional Results available

Addressing Cognitive Fog in Long-COVID-19 Patients

NCT05597722
View directory record Official record
Conditions
Cognitive Impairment, Long COVID
Interventions
Digital cognitive behavioral intervention-RxWell, Amphetamine-Dextroamphetamine
Behavioral · Drug
Lead sponsor
Eva Szigethy
Other
Eligibility
21 Years to 65 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 21, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Testing a Personally Controlled Health Record to Ameliorate Influenza at MIT

NCT00531700
View directory record Official record
Conditions
Influenza
Interventions
Health messaging, Health messages
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 30, 2009 · Synced Sep 5, 2026, 10:23 PM EDT