Comparative Efficacy of Mailed FIT vs. FIT-DNA Screening in Community Health Centers

Article Impact Level: HIGH
Data Quality: STRONG
Summary of  JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2026.1170 
Dr. Folasade P. May et al.

Points

Investigators conducted a large-scale clinical trial mailing screening kits to over five thousand patients at community health centers to determine which stool-based test most effectively improves cancer detection rates.
The study found that twenty-eight percent of patients receiving the newer DNA-based stool tests completed their screening compared to twenty-three percent of those who were mailed a standard immunochemical test.
Researchers observed that the manufacturer-led outreach and the reduced frequency of testing associated with the newer kits likely contributed to the higher participation rates among the predominantly Hispanic participants.
Despite abnormal test results indicating a potential risk for cancer only thirty-six percent of patients in both study groups successfully completed the required follow-up colonoscopy within a six-month period.
These results highlight a critical need for healthcare systems to address the systemic barriers that prevent under-resourced and uninsured populations from accessing essential diagnostic procedures after initial screening tests.

Summary

This study evaluated the efficacy of two mailed stool-based screening modalities in improving colorectal cancer (CRC) screening rates among underserved populations. Given that CRC disproportionately affects individuals in under-resourced settings, the research sought to determine if FIT-DNA kits, which include DNA markers and manufacturer-led outreach, outperformed traditional fecal immunochemical tests (FIT). The cluster randomized clinical trial involved over 5,000 participants aged 45–75 across eight community health centers (CHCs) in Boston and Los Angeles, a cohort that was 75% Hispanic and 50% Medicaid-enrolled.

The analysis revealed that participants receiving the FIT-DNA kit achieved a significantly higher 90-day screening completion rate of 28%. In comparison, those receiving the standard FIT kit accompanied by automated text-message reminders achieved a completion rate of 23%. While FIT-DNA showed superior uptake—likely due to the integrated wrap-around patient assistance programs—the study identified a critical bottleneck in the diagnostic continuum. Despite abnormal results, the follow-up colonoscopy rate within six months remained suboptimal at only 36% across both study arms, highlighting persistent barriers to invasive diagnostic procedures.

The findings suggest that while newer stool-based technologies and centralized outreach can modestly improve initial screening participation, they do not resolve the systemic challenges associated with diagnostic follow-up. Disparities were noted by geography, with Boston CHCs showing higher completion than those in Los Angeles, potentially reflecting regional differences in insurance coverage and specialist access. The researchers emphasize that systematic interventions must address the entire screening-to-diagnostic pathway to effectively reduce CRC mortality in high-risk, under-resourced communities. Future strategies should focus on eliminating the barriers that prevent patients with positive stool tests from accessing necessary colonoscopies.

Link to the article: https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2848032

References

May, F. P., Brodney, S., Tuan, J. J., Syngal, S., Chan, A. T., Glenn, B., Johnson, G., Chang, Y., Drew, D. A., Moy, B., Rodriguez, N. J., Warner, E. T., Anyane-Yeboa, A., Ukaegbu, C., Davis, A. Q., Schoolcraft, K., Regan, S., Le Beaux, K., Lee, E. T., … Haas, J. S. (2026). Mailed outreach for colorectal cancer screening in community health centers: The cares pragmatic cluster randomized clinical trial. JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2026.1170