Increasing CRC Screening in Community Health Centers Through Mobile Messaging Optimization

This trial is studying optimization of text messages and outreach approaches by community health centers to increase patients' completion of FIT colon cancer screening tests. Text message reminders are a low cost, scalable way to deliver patient reminders that are low burden for staff. The proposed work uses a creative, community-engaged, systems-level approach to improve completion of FIT testing and abnormal follow-up and program sustainment in CHCs. The study design includes three parts. First, the text messages will be optimized to maximize patient engagement and outreach (Aims 1 \& 2). The study will enroll patients from three partnering CHCs to participate in six focus groups to inform message design. The investigators will also conduct key informant interviews with 5-15 staff per CHC regarding the logistics of ensuring seamless integration into routine clinical operations and perspectives on the intervention activities. Then, a factorial experiment will be conducted, assigning 2,000 patients who have received a stool-based screening kit to different reminder messages. Engagement will be measured as replies or use of ≥1 links, to indicate interaction with the message. The experiment will compare: (1) personalization; (2) concern or negative emotions about screening; and (3) gain framing. In the factorial design patients will not be individually enrolled, this intervention will be tested within the workflows of usual practice. All data for the factorial experiment will be de-identified. With those tools in place, the investigators will optimize outreach strategies for CRC screening completion. In a second factorial experiment with 5,100 patients, the investigators will optimize outreach strategy for primary screening outcomes of home-based stool screening test completion and screening completion by any guideline-recommended CRC screening test. Secondary outcomes include follow-up care for abnormal stool test results. In this factorial experiment, the investigators will test the impact of three outreach conditions on screening completion: increasing patient autonomy, providing information for accessing resources for impediments to care, and provision of live support. As in the first factorial test, for the second factorial test patients will not be individually enrolled, as the intervention will be tested within the workflows of usual practice. All data will be de-identified. Finally, the study will assess implementation outcomes and sustainment of intervention components and effects. The investigators will conduct staff interviews and surveys to assess organizational capacity for sustaining the intervention elements being tested as well as the acceptability and feasibility of the text messages and screening tools. Sustainment of the text message outreach intervention elements will be assessed at post intervention and two 6-month intervals post-intervention.