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Showing 25–42 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Colonoscopy and Questionnaire Clear all
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Safety and Efficacy of the Use of ME-APDS During Colonoscopy

NCT04640792
View directory record Official record
Conditions
Screening Colonoscopy, Surveillance Colonoscopy
Interventions
Screening or Surveillance Conventionall colonoscopy
Procedure
Lead sponsor
Magentiq Eye LTD
Industry
Eligibility
18 Years to 90 Years
Enrollment
952 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
4
States / cities
Baltimore, Maryland • New York, New York • Cleveland, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated May 4, 2022 · Synced Sep 17, 2026, 10:55 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Amitiza® Plus GoLYTELY® (PEG) Versus Placebo Plus GoLYTELY® for Outpatient Colonoscopy Preparation

NCT00645801
View directory record Official record
Conditions
Colonoscopy
Interventions
lubiprostone (Amitiza), Placebo
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
158 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
3
States / cities
Detroit, Michigan • Novi, Michigan • West Bloomfield, Michigan
Source: ClinicalTrials.gov public record
Updated May 31, 2023 · Synced Sep 17, 2026, 10:55 AM EDT
Completed No phase listed Observational

Genetic Study of Young Patients With Colorectal Cancer

NCT00044967
View directory record Official record
Conditions
Colorectal Cancer
Interventions
microsatellite instability analysis
Genetic
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years to 49 Years
Enrollment
651 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
71
States / cities
Mobile, Alabama • Colton, California • Duarte, California + 52 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2016 · Synced Sep 17, 2026, 10:55 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Efficacy and Patient Satisfaction of Miralax and Gatorade Versus Movi Prep

NCT01695863
View directory record Official record
Conditions
Colorectal Cancer
Interventions
comparing 2 drugs on their effect on the bowel preparation for colonoscopy
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Sep 17, 2026, 10:55 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Improving Colorectal Cancer Screening Uptake Through Education and Stool-Based Testing Outreach

NCT07781774
View directory record Official record
Conditions
Colorectal Cancer (CRC) Screening, CRC Screening, Rectal Cancer, Colon Cancer, Colorectal Cancer
Interventions
Colorectal Cancer Education Materials, Cologuard test kit, Fecal immunochemical test kit, Usual Care
Behavioral · Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
45 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 23, 2026 · Synced Sep 17, 2026, 10:55 AM EDT
Terminated Not applicable Interventional

Comparison of Barium Enema, Computed Tomographic Colonography, and Colonoscopy in Detecting Colon Cancer

NCT00016029
View directory record Official record
Conditions
Colorectal Cancer
Interventions
screening questionnaire administration, barium enema injection, computed tomography, computed tomography colonography, diagnostic colonoscopy, screening colonoscopy
Other · Procedure
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
775 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
14
States / cities
La Jolla, California • San Francisco, California • Vero Beach, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2013 · Synced Sep 17, 2026, 10:55 AM EDT
Completed No phase listed Observational

Use of Screening Colonoscopy Among Minority Women and Men

NCT00613873
View directory record Official record
Conditions
Colorectal Screening
Interventions
Colonoscopy and Questionnaire
Procedure
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
50 Years and older
Enrollment
611 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 14, 2009 · Synced Sep 17, 2026, 10:55 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Polyp Detection With The Peerscope System™

NCT01549535
View directory record Official record
Conditions
Colon Polyps and Adenomas, Colon Cancer
Interventions
Colonoscopy done with:PeerMedical System and Olympus/Pentax/Fuji colonoscopy system
Device
Lead sponsor
PeerMedical Ltd.
Industry
Eligibility
18 Years to 70 Years
Enrollment
197 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 24, 2016 · Synced Sep 17, 2026, 10:55 AM EDT
Completed Phase 2 Interventional

Sirolimus for Cowden Syndrome With Colon Polyposis

NCT04094675
View directory record Official record
Conditions
PTEN Gene Mutation, PTEN Hamartoma Tumor Syndrome, PTEN Hamartoma Syndrome, Cowden Syndrome, Bannayan Syndrome, Bannayan Zonana Syndrome, Polyposis
Interventions
Sirolimus
Drug
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 80 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 17, 2026, 10:55 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Screening and Risk Factors of Colon Neoplasia

NCT01647776
View directory record Official record
Conditions
Colon Cancer
Interventions
Stool DNA Test, biopsies of rectal and colon mucosa, Questionnaires
Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
30 Years to 80 Years
Enrollment
3,315 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 8, 2021 · Synced Sep 17, 2026, 10:55 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

A Study of the Possible Effects of Medication on Young Onset Colorectal Cancer (YOCRC)

NCT05568420
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Not listed
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years to 49 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 17, 2026, 10:55 AM EDT
Completed No phase listed Observational

Can Sleep Apnea Screening Questionnaire Predict Adverse Events in Endoscopic Studies

NCT03436381
View directory record Official record
Conditions
Sleep Apnea, Adverse Event
Interventions
Questionaire
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
350 participants
Timeline
2018 – 2021
U.S. locations
1
States / cities
Weston, Florida
Source: ClinicalTrials.gov public record
Updated Oct 21, 2025 · Synced Sep 17, 2026, 10:55 AM EDT
Active, not recruiting Not applicable Interventional Results available

Screening for Colorectal Cancer in Older Patients (PLCO Screening Trial)

NCT01696981
View directory record Official record
Conditions
Colon Carcinoma, Rectal Carcinoma
Interventions
Screening Questionnaire Administration, Sigmoidoscopy
Other · Procedure
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
55 Years to 74 Years
Enrollment
154,900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 17, 2026, 10:55 AM EDT
Active, not recruiting No phase listed Observational

The Colonic Microbiome and Mucosal Immunity in Inflammatory Bowel Disease and Ankylosing Spondylitis

NCT02389075
View directory record Official record
Conditions
Inflammatory Bowel Diseases (IBD), Ankylosing Spondylitis (AS)
Interventions
Pinch biopsies, Flexible sigmoidoscopy
Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2026
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Sep 17, 2026, 10:55 AM EDT
Terminated Phase 1 Interventional Results available

Fecal Microbiota Transplantation (FMT) of FMP30 in Relapsing-Remitting Multiple Sclerosis

NCT03594487
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
FMP30 Donor Stool, Fecal Microbiota Transplantation (FMT) of FMP30 Donor Stool, Observational Control
Drug · Procedure · Other
Lead sponsor
Jeffrey Gelfand
Other
Eligibility
18 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Sep 17, 2026, 10:55 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Biological, Genetic, and Lifestyle Risk Factors for Developing Colorectal Adenomas or Polyps in Participants Undergoing Colonoscopy

NCT00625066
View directory record Official record
Conditions
Colorectal Cancer, Precancerous Condition
Interventions
biologic sample preservation procedure, cytology specimen collection procedure, medical chart review, questionnaire administration, survey administration, biopsy, evaluation of cancer risk factors, screening colonoscopy
Other · Procedure
Lead sponsor
Vanderbilt University
Other
Eligibility
40 Years to 75 Years
Enrollment
8,108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2025
U.S. locations
4
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Sep 17, 2026, 10:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Variability in Microbial Response to Dietary Fiber

NCT06023940
View directory record Official record
Conditions
Microbial Colonization
Interventions
High fiber
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
45 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 17, 2026, 10:55 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Combinatorial Single Cell Strategies for a Crohn's Disease Gut Cell Atlas

NCT04113733
View directory record Official record
Conditions
Crohn Disease
Interventions
Sample Collection
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 3, 2025 · Synced Sep 17, 2026, 10:55 AM EDT