Patient choice in colorectal cancer treatment - A systematic review and narrative synthesis of attribute-based stated preference studies.

"CONFLICT OF INTEREST None declared."

"FUNDING INFORMATION The systematic review described in this study received no funding."

"The protocol for this systematic review was guided by the PRISMA and AMSTAR 2 guidelines and was prospectively registered with PROSPERO (registration no. CRD42021245077) [, ]. To provide the most comprehensive review of the literature in this field, we aimed to include all manuscripts meeting study type criteria which featured the use of AbSP techniques (DCE, TTO, BWS or conjoint analysis) in CRC treatment. All publication and study types were considered for inclusion to enrich the volume of applicable studies and reduce publication bias, including literature such as conference abstracts or editorials. Case series, cohort and case control studies and randomised control trials were included. Referenced studies within identified literature (specifically systematic reviews) were also considered for inclusion in the review by searching citations forwards and backwards. The participants were adult patients or clinicians involved in their care over the age of 18 that have been involved in an AbSP study as part of CRC treatment preferences. Exclusion criteria involved other types of preference studies (non‐AbSP) and studies not involving CRC treatment (for example CRC screening). AbSP studies were defined as any method that used quantitative data to explore preferences and exclusion of non‐AbSP studies ensured that narrative data synthesis could be performed in this study."