Effectiveness of patient-targeted interventions to inform decision making and improve uptake of colorectal cancer genetic evaluation for at-risk individuals: A systematic review

Background: Inherited colorectal cancer syndromes increase the risk of contracting colorectal and other cancers. International guidelines recommend the identification of individuals with hereditary colorectal cancer and the supervision of asymptomatic individuals with a family history. However, detection of hereditary colorectal cancer is suboptimal. The prevalence of genetic counselling and testing for indi-viduals with high genetic risk is low.Objective: To identify, characterize and summarize patient-targeted interventions on improving the up-take of colorectal cancer genetic evaluation for at-risk individuals and enhancing their informed decision making.Design: Systematic review.Data Sources: Six electronic databases (PubMed, CINAHL, Web of Science, Embase, PsycINFO, and Cochrane library) were searched to identify eligible clinical trials from each database's inception to March 25, 2020. The reference lists of the included studies and reviews were checked for additional articles.Review Methods: Studies were screened and independently appraised by two reviewers using the stan-dardized critical appraisal checklist for randomized controlled trials and quasi-experimental studies from the Joanna Briggs Institute. The results were tabulated and reported in descriptive format.Results: Based on the inclusion criteria, 8 articles satisfied the inclusion criteria and were included. The studies examined patient-targeted intervention strategies related to risk assessment, education, and de-cision aids. Outcomes included (1) informed decisions regarding microsatellite instability testing, (2) in -formed decisions concerning genetic testing, (3) genetic counselling and testing. Most of the included studies revealed that interventions had positive effects on the uptake of colorectal cancer genetic evalu-ation for at-risk individuals and their informed decision making.Conclusions: There were few studies included in this review, and the results were inconsistent. Based on this review, the conclusion cannot be made that interventions for risk assessment, education, and deci-sion aids have positive effects on the uptake of colorectal cancer genetic evaluation for at-risk individuals and their informed decision making. However, to our knowledge, this is the first systematic review to summarize the effectiveness of patient-targeted interventions to inform decision making and improve uptake of colorectal cancer genetic evaluation for at-risk individuals. This review provides important ev-idence for related topics. Future studies with rigorous designs are recommended. Nurses have a crucial role in personalized health care. The involvement of nurses in collaboration with all the stakeholders in the development, implementation and evaluation of cancer genetic screening programs to improve ge-netic referral of individual at risk. (c) 2021 Elsevier Ltd. All rights reserved.