Evaluating SMS Reminders to Boost Participation in Colorectal Cancer Screening for Adults Aged 50 to 69 in Valls Occidental

What this Trial Is About

Colorectal cancer is a major cause of death in Catalonia, and early detection programs using the fecal immunochemical test FIT have proven effective in reducing both incidence and mortality. However, the success of these programs depends on high participation rates, which currently stand at 42% in the Valls Occidental region, below the recommended 65% minimum. This randomized controlled trial aims to evaluate whether sending a reminder SMS can increase participation in the colorectal cancer screening program among individuals aged 50 to 69 years. Participants are divided into two groups. The control group receives the standard care, which includes an initial invitation letter at week 0 and a postal reminder letter at week 6 if they do not participate. The intervention group also receives the initial invitation letter at week 0, followed by a one-way SMS reminder sent exactly five weeks after the invitation if they have not completed the FIT. Non-participants in both groups receive the postal reminder letter at week 6. The SMS is sent through a secure messaging platform and was optimized for clarity and cultural acceptance. During the study, participation rates will be tracked up to three months after the initial invitation. Researchers will also measure the time to participation and the number of reminder letters sent. Statistical analyses will compare participation rates and response times between groups. The study is conducted within the framework of the regional colorectal cancer screening program and coordinated by the Cancer Screening Unit of the Consorci Corporaci Sanitria Parc Taul. The total follow-up period for participation is three months after the initial invitation.

Impact of SMS Messaging on Participation in Colorectal Cancer Screening