The effects of test preference, test access, and navigation on colorectal cancer screening.

Background: Little is known about how colorectal cancer screening test preferences operate together with test access and navigation to influence screening adherence in primary care.

Methods: We analyzed data from a randomized trial of 945 primary care patients to assess the independent effects of screening test preference for fecal immunochemical test (FIT) or colonoscopy, mailed access to FIT and colonoscopy, and telephone navigation for FIT and colonoscopy, on screening.

Results: Preference was not associated with overall screening, but individuals who preferred FIT were more likely to complete FIT screening (P = 0.005), whereas those who preferred colonoscopy were more likely to perform colonoscopy screening (P = 0.032). Mailed access to FIT and colonoscopy was associated with increased overall screening (OR = 2.6, P = 0.001), due to a 29-fold increase in FIT use. Telephone navigation was also associated with increased overall screening (OR = 2.1, P = 0.005), mainly due to a 3-fold increase in colonoscopy performance. We estimated that providing access and navigation for both screening tests may substantially increase screening compared with a preference-tailored approach, mainly due to increased performance of nonpreferred tests.

Conclusions: Preference influences the type of screening tests completed. Test access increases FIT and navigation mainly increases colonoscopy. Screening strategies providing access and navigation to both tests may be more effective than preference-tailored approaches.

Impact: Preference tailoring in colorectal cancer screening strategies should be avoided if the objective is to maximize screening rates, although other factors (e.g., costs, necessary follow-up) should also be considered.