Negative results from DNA-based population screening for adult-onset diseases: the recipients' experience.

DNA-based population screening for adult-onset diseases holds promise for advancing personalized medicine and improving public health. Yet as most individuals pursuing such screening receive negative results, the return of results process must ensure that negative results and their implications are clearly understood. We explored the experiences of adults who received negative results from such screening as part of the Electronic Medical Records and Genomics consortium Phase 3 project (eMERGE-3) at Columbia University. In addition to a laboratory report and a standard counseling letter explaining the negative results, participants were randomized to receive (or not) a vignette explaining the results. A diverse cohort of 437 adult participants completed both baseline and post-result surveys. Many participants reported motivations that did not match the screening goals and included hope for diagnosis and family disease risk. A quarter of participants reported not feeling confident explaining their results to others (n = 105, 24%), and those who did not receive the vignette were less confident than those who did (29% versus 19% respectively; p-value = 0.02). Open-text responses about personal and family members' reactions to the results suggested that some perceived an exaggerated benefit from the negative result and might forgo more appropriate genetic testing. Our findings highlight the complexity of returning negative results and raise concerns that participants might forgo more suitable genetic testing. Future research is needed to compare the efficacy of different forms of ancillary materials on individuals' comprehension of negative results.