Follow‐up
DISEASE
Patients who consented to participate were asked to complete seven questionnaires either in‐person, by telephone, or email. Study coordinators were instructed not to suggest whether or how participants might use the brochure while answering study surveys. Three of the questionnaires were answered 7–21 days after having received the allocated brochure: (1) a multiple‐choice survey with two sections: sociodemographic and disease knowledge. The sociodemographic information included age, educational attainment, and employment status. The knowledge section asked patients to identify their clinical stage, molecular subtype, and appropriate systemic treatment options. All items in the knowledge section included “I don't know” as a possible answer; (2) a survey to evaluate participants' perception of the utility of their educational brochure on a four‐point Likert‐type scale; (3) the third survey was the European Health Literacy Survey Questionnaire—short version (HLS‐EU‐Q16) in Spanish to evaluate participants' understanding and communication of medical information.The four remaining questionnaires were answered 30–51 days after brochure receipt: (1) the knowledge section of the first survey was repeated to evaluate information retention; (2) the second survey was the 9‐item Shared Decision‐Making Questionnaire (SDM‐Q‐9) developed by Kriston et al.,