Barriers and facilitators to faecal immunochemical testing in symptomatic populations: A rapid systematic scoping review and gap analysis

Aim: Faecal immunochemical testing (FIT) is used to triage people with signs or symptoms of a colorectal cancer (CRC). Recent guidelines have recommended further research to improve access, uptake and return of FIT. This systematic scoping review aims to understand the barriers and facilitators to FIT testing in symptomatic patients. Method: Qualitative, quantitative and mixed-methods studies published after September 2013 were included. MEDLINE, EMBASE and PsycINFO databases were searched to identify publications examining barriers and facilitators to FIT. Initially, the data underwent thematic analysis, and subsequently, factors were aligned to components of the Capability, Opportunity, Motivation, Behaviour model. All outcomes are presented in adherence to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Results: One thousand two hundred thirty-two papers were identified; 11 met the inclusion criteria. Barriers and facilitators were identified at the patient (e.g., knowledge), provider (e.g., general practitioner awareness) and service level (e.g., method of providing FIT kits). Factors were categorised into the subcomponents of the model: psychological capability (e.g., lack of FIT knowledge), reflective motivation (e.g., beliefs regarding FIT sampling and faeces being unhygienic) and automatic motivation (e.g., embarrassment, scary, anxiety provoking). Gaps in knowledge emerged in three domains: (1) patient experience, (2) FIT pathway and (3) healthcare professionals experience of FIT. Conclusion: This systematic scoping review provides a summary of the literature on FIT uptake, and identified factors across multiple levels and components. To increase adherence to FIT completion within primary care, a multifaceted theory and evidence- based approach is needed to underpin future behavioural science interventions.