Content validity
The SexFS Brief demonstrated adequate patient-reported content validity, meaning participants felt that the questions were relevant to SD and all SD domains were included (representative quotations presented in Table 3). Specifically, nearly all participants reported that the questions uniformly felt relevant and important to SD. For example, one participant recognized relevance both to others and to himself: “…the ones about how often and stuff definitely [are] relevant for everybody…yeah, I guess I connected with it” (Male, age 17). Another participant acknowledged the importance of questions to SD, stating “these are really important questions to be asked and to give real answers to” (Female, age 24). When explicitly asked about questions that are missing from the SexFS Brief, several potential questions were mentioned, but none by more than one participant. These singularly mentioned potential missing items were questions on gender identity, sex drive, vaginal lubrication, breast pain, concerns or anxiety about SD due to cancer history, and effects of cancer therapy on puberty.