| What it is | A program where participants receive a standard fecal immunochemical test (FIT) kit by mail and get telephone-based patient navigation to support kit completion and return. | A program where participants are sent a standard mailed FIT kit with supportive text messages as patient navigation to encourage use and return. | A program where participants are mailed an enhanced FIT kit containing a video brochure, gloves, a stool collection device, and receive telephone-based navigation for support. | A program where participants get an enhanced mailed FIT kit, as above, and receive patient navigation through supportive text messages. | Usual care means eligible adults are offered colorectal cancer screening through their routine primary care visit, with options such as in-person recommendation of a FIT kit, colonoscopy, or other guideline-approved tests. |
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| Role in the trial | One of the four randomized arms testing telephone-based support for mailed FIT kit completion. | One of the four randomized arms testing text message-based support with a standard FIT kit. | Randomized arm testing if enhanced kit features plus telephone navigation increase FIT return rates. | Randomized arm testing enhanced kit features with patient navigation delivered via text messaging. | Represents current guideline-based colorectal cancer screening performed outside of the trial, not a randomized study arm. |
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| Primary use | Increase the rate of FIT kit completion and return to improve colorectal cancer screening uptake. | Increase FIT kit completion and screening by supporting participants with text-based guidance. | Evaluate whether enhanced kit materials plus telephone navigation further improve the likelihood of completed screening. | Assess if a combination of enhanced kit features and text navigation increases screening participation. | Offer guideline-recommended colorectal cancer screening, with FIT kit or other approved methods, during routine healthcare visits to eligible adults. |
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| How it is given or performed | The standard FIT kit is mailed to the participant; a patient navigator contacts the participant by telephone to guide and encourage test completion and mailing the sample back. | Participants receive a standard FIT kit in the mail and are sent text messages with instructions and reminders for using and returning the kit. | An enhanced FIT kit, including extra support materials, is mailed and a patient navigator calls participants to provide additional guidance. | Enhanced FIT kit is mailed, and participants are given step-by-step instructions and reminders through text messaging. | Screening is discussed during a primary care visit, and eligible adults may be offered a FIT kit to complete at home, a colonoscopy referral, or another guideline-approved test. |
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| Evidence status | The effectiveness of mailed FIT kits with telephone navigation in improving screening rates is under evaluation in this ongoing clinical trial. | The effect of mailed FIT kits with text message navigation support is being studied prospectively in this trial. | Whether enhanced kit features plus telephone navigation improve FIT return rates beyond standard approaches is being evaluated; results are not yet available. | The trial is assessing if enhanced kits paired with text-based navigation lead to higher screening participation; evidence is under investigation. | Current evidence, including guidelines, supports office-initiated screening offers as standard practice for colorectal cancer screening in average-risk adults. |
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| Important limitations | Success of mailed FIT kit programs can depend on participant engagement and willingness to complete and return the test. Results are not yet available and may not apply to all rural or underserved populations. | Effectiveness may be limited by participants' responsiveness to text messages or their ability to complete mailed test kits. Trial findings are pending and may have limited generalizability. | Enhanced kit features may not benefit all demographics, and the combined effect with telephone navigation is still being studied. Broader impact remains uncertain until results are available. | Participants' engagement with both enhanced materials and text-based support may vary, and results on effectiveness are still being gathered. | Usual care often relies on patient attendance for office visits, and screening rates may be lower without proactive outreach or mailed reminders. |
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