# Real-world analysis of community colorectal neoplasia screening based on stool DNA methylation detection

## TL;DR

This study shows that adding stool DNA methylation testing to standard screening improves colonoscopy compliance and detects more colorectal neoplasia in a community setting.

## Contribution

Demonstrates the real-world effectiveness of combining stool DNA methylation detection with traditional screening methods for colorectal neoplasia.

## Key findings

- The HRFOsD group had a 93.7% colonoscopy compliance rate, significantly higher than HRFO and sDNA groups.
- Adding sDNAMD increased colorectal neoplasia detection rates compared to traditional methods.
- Female participants in the HRFOsD group had higher CN detection rates than males.

## Abstract

This study aimed to assess the effectiveness of stool DNA methylation detection (sDNAMD) in improving colorectal neoplasia (CN) detection rates and colonoscopy compliance in a real-world community setting. Between July 1, 2023, and June 30, 2024, residents aged 50–75 from Maqiao Town, Minhang District, Shanghai, were invited to participate in a CN screening program. Participants were randomly assigned to one of three groups: high-risk questionnaire + fecal occult blood test (HRFO), high-risk questionnaire + FOBT + sDNAMD (HRFOsD), or sDNAMD only (sDNA). Colonoscopy was performed based on initial screening results, and the number of individuals undergoing colonoscopy, along with results, were recorded to calculate compliance and CN detection rates. The HRFOsD group exhibited a significantly higher colonoscopy compliance rate (93.7%) compared to the HRFO (32.6%) and sDNA (73.5%) groups (P<0.0001). Residents with negative FOBT, negative sDNA results, or those who did not undergo sDNA testing did not undergo colonoscopy. In the HRFOsD group, the CN detection rate was higher in females compared to males. Compared to the HR and FOBT+ group, the CN detection rate was significantly higher in the LR and FOBT+ and sDNA+ group. Adding sDNAMD to the high-risk questionnaire and FOBT screening led to a notable increase in both colonoscopy compliance and CN detection rates. The conclusion is that adding stool DNA methylation detection to the community FOBT screening program can significantly improve colonoscopy compliance and colorectal neoplasia detection rates among community residents.