Keywords
Health Knowledge, Attitudes, Practice
Heart Failure
Interviews
Nursing
Patient Autonomy
How to Cite
Abstract
Objective: To develop an interview script on heart failure (HF) knowledge, beliefs about advance directives (ADs), and intention to complete ADs and to assess its content and face validity. Methods: A multi-method study developed in three stages: Stage 1) Methodological study of script development based on the Brazilian HF guidelines, the Brazilian AD model, and the Theory of Planned Behavior. Stage 2) Content validity assessment by six experts, who evaluated items for practical relevance, clarity, theoretical relevance, and dimensionality. Items with Content Validity Index (CVI) <80% were revised and re-evaluated. Stage 3) Face validity assessment through cognitive testing (piloting) conducted with 20 patients with HF receiving outpatient care. Results: The script included 11 items on HF knowledge and 21 items on beliefs and intention to complete ADs. Thirteen items were revised in Stage 2, achieving CVI >80% and Gwet’s AC2 >0.80. Patients reported difficulty with items on behavioral, normative, and control beliefs, suggesting the need for prior education about ADs. Conclusions: The script had satisfactory content and face validity. It may help nurses and other healthcare professionals identify knowledge gaps and beliefs influencing AD completion, supporting patient autonomy and informed decision-making in end-of-life care.
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