Provider communication contributes to colorectal cancer screening intention through improving screening outcome expectancies and perceived behavioral control.

Colorectal cancer (CRC) screening continues to be underutilized in the US despite the availability of multiple effective, guideline-recommended screening options. Provider recommendation has been consistently shown to improve screening completion. Yet, available literature provides little information as to how specific information providers communicate influence patient decision-making about CRC screening. We tested the pathways through which information communicated by providers about the "Why" and "How" of CRC screening using the mt-sDNA test contributes to intention to complete the test. Data came from a behavioral theory-informed survey that we developed to identify psychosocial factors associated with mt-sDNA screening. RTI International administered the survey between 03/2022-06/2022 to a sample of US adults ages 45-75 who received a valid order for mt-sDNA screening with a shipping date between 5/2021-9/2021. Participants completed an electronic or paper survey. We tested the proposed relationships using structural equation modeling and tested indirect effects using Monte Carlo method. A total of 2,973 participants completed the survey (response rate: 21.7%) and 81.6% (n = 2,427) reported have had a conversation with their health care provider about mt-sDNA screening before the test was ordered. We found that "Why" information from providers was positively associated with perceived effectiveness of mt-sDNA screening, while "How" information was positively associated with perceived ease of use. "Why" information contributed to screening intention through perceived effectiveness while "How" information contributed to screening intention through perceived ease of use. These findings emphasize the critical role of provider communication in shaping patient decision-making regarding CRC screening. CRC screening interventions could consider implementing provider-patient communication strategies focusing on improving patient understanding of the rationale for CRC screening and the effectiveness of available screening options as well as addressing barriers and enhancing patients' self-efficacy in completing their preferred screening option.