BRCA1 and cancer: Similarly, Park et al. (2022) [36] estimated a mean knowledge score of 66.9% (SD 21.7%) from a cohort of 700 BRCA1/2 mutation-negative breast cancer patients, while Napier et al. (2022) [30] indicated a relative score of 45% (SD 25%) in a population of 348 patients diagnosed with a likely hereditary form of cancer.