Decision Counseling and Follow-up for Shield+ Patients (DCaF)

May 27, 2026 updated by: Guardant Health, Inc.

Decision Counseling and Follow-up (DCaF) for Shield+ Patients

Prospective, observational, minimal-risk study evaluating decision-making, decisional conflict, intention to undergo complete diagnostic evaluation (CDE), and colonoscopy completion after a positive Shield TM blood-based colorectal cancer screening test result.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

The DCaF study uses a prospective, observational design to characterize how patients make decisions following a Shield(+) screening result and to assess real-world adherence to recommended diagnostic colonoscopy. Because the intervention of interest is the patient's naturally occurring decision-making process-not the performance of the test itself-a non-interventional design is methodologically appropriate and minimizes participant burden. Incorporating decision counseling allows systematic evaluation of changes in preference, decisional conflict, and intention, while linkage to real-world evidence (RWE) claims data provides an efficient and objective method for determining colonoscopy completion. This approach enables the study to identify behavioral, clinical, and system-level factors associated with follow-up adherence without altering standard clinical care.

Study Type

Observational

Enrollment (Estimated)

350

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adults with a recent clinically ordered Shield™ test result who received a positive (abnormal) screening (Shield+) result.

Description

Inclusion Criteria:

  • Participant is 45-75 years old at the time of ShieldTM test order.
  • Participant has a valid Shield(+) test result.
  • Participant is willing and able to complete the informed consent process
  • Participant is able to complete the informed consent process and decision counseling session in English

Exclusion Criteria:

  • Participant is already enrolled in another Guardant Health, Inc. clinical study or has received a positive MCD result for a cancer type other than CRC.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
SHIELD Positive with Completed Colonoscopy
Patients who are intending to undergo a complete a diagnostic evaluation
Behavioral: Decision Counseling Session
During the decision counseling session, JH research staff will review the Complete Diagnostic Evaluation (CDE) infographic and use an online survey to guide the participant through a telephone encounter that involves the identification of patient goals that are likely to affect their decision to have CDE and not to have CDE.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
CDE Decisional Conflict
Time Frame: From Enrollment to the end of study at 6 months
Determine the level of preference for, decisional conflict related to, intention to have CDE following a Shield+ result at baseline and after decision counseling and assess change.
From Enrollment to the end of study at 6 months
Factors for CDE Decisional Conflict
Time Frame: From Enrollment to End of Study at 6 months
Identify factors associated with CDE decisional conflict, intention, and preference following a positive Shield result.
From Enrollment to End of Study at 6 months
Factors for Changes in CDE Decisional Conflict
Time Frame: From Enrollment to End of Study at 6 months
Identify factors associated with change in CDE preference, decisional conflict, intention, and preference.
From Enrollment to End of Study at 6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Guardant Health, Inc.

Collaborators

Thomas Jefferson University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 1, 2026

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

June 1, 2028

Study Registration Dates

First Submitted

May 27, 2026

First Submitted That Met QC Criteria

May 27, 2026

First Posted (Actual)

June 2, 2026

Study Record Updates

Last Update Posted (Actual)

June 2, 2026

Last Update Submitted That Met QC Criteria

May 27, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 07-GI-008

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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