Abstract
Scalable models for result disclosure are needed to ensure large-scale access to genomics services. Research evaluating alternatives to genetic counseling suggests effectiveness; however, it is unknown whether these findings are generalizable across populations. We assessed whether a letter is non-inferior to telephone genetic counseling to inform participants with no personal or family history of cancer of their normal results. Data were collected via self-report surveys before and after result disclosure (at 1 and 6 months) in a study sample enriched for individuals from underserved populations. Primary outcomes were subjective understanding of results (global and aggregated) and test-related feelings, ascertained via three subscales (uncertainty, negative emotions, and positive feelings) of the Feelings About genomiC Testing Results (FACToR) measure. Secondary outcomes related to satisfaction with communication. Non-inferiority tests compared outcomes among disclosure methods. Communication by letter was inferior in terms of global subjective understanding of results (at 1 month) and non-inferior to telephoned results (at 6 months). Letter was non-inferior to telephone for aggregated understanding (at 6 months). Letter was superior (at 1 month) to telephone on the uncertainty FACToR subscale. Letter was non-inferior to telephone on the positive-feelings FACToR subscale (at 6 months). Letter was non-inferior to telephone for satisfaction with mode of result delivery and genetic test results. Communication via letter was inferior to telephone in communicating the "right amount of information." The use of written communication to relay normal results to low-risk individuals is a promising strategy that may improve the efficiency of care delivery.