Evaluation of the Shield Blood Test for Colorectal Cancer Screening in Average-Risk Adults Aged 45 to 81

What this Trial Is About

This research aims to evaluate the Shield blood tests performance for colorectal cancer CRC screening in people aged 45 to 81 who are at average risk for CRC. The study focuses on assessing the test during a second round of screening, using colonoscopy as the reference standard. CRC is a common and serious disease, especially affecting older adults and certain minority groups, with early detection being key to improving outcomes. Participants will undergo the Shield blood test as part of their routine standard care, and their results will be compared to colonoscopy findings. This study is observational and collects real-world evidence over a period of 33 to 42 months after enrollment to assess how well the Shield test performs in detecting CRC or its precursors during the second screening interval. Participants will be involved in scheduled study procedures and standard care assessments, with data collected on the tests accuracy and effectiveness over time. The main outcome measured is the performance of the Shield test during the second testing period. The study will continue until December 2030, monitoring participants to gather long-term information about CRC screening efficacy in an average-risk population.

Shield Post-Approval Study Protocol