Content validation of the nursing outcome Knowledge Heart Failure Management: Brazilian nurses' opinions.

Purpose: To estimate the content validity of the outcome Knowledge: Heart Failure Management (1835) of the Nursing Outcomes Classification (NOC).
Methods: A methodological study conducted in Brazil with nurses with expertise in cardiovascular nursing and nursing process. The nurse experts evaluated the relevance of the indicators for the nursing outcome on a 5-point Likert scale. A total of 55 indicators were analyzed, including 50 NOC indicators, four indicators located from a scoping review, and one suggested by an expert during the content validation process. The relevance ratio supported the categorization of indicators as critical, supplemental, or unnecessary. Relevance ratios of critical and supplemental indicators were summed and divided by the total number of the indicators to calculate the outcome content validity (OCV) score of the nursing outcome.
Findings: Fifteen nurse experts, mostly females (n = 13) with a mean age of 36.0 ± 6.3 years, 13.9 ± 6.5 years of professional experience, and extensive use of the nursing process in their clinical practice (n = 10), teaching (n = 13), and research (n = 11), participated in this study. Regarding the content validation, 43 (78.2%) out of 55 indicators were categorized as critical (relevance ratio .80-.98), 11 (20%) as supplemental (relevance ratio .67-.79), and one indicator (1.8%) was categorized as unnecessary (relevance ratio .48). The OCV score of the nursing outcome was .87.
Conclusion: The study provided evidence of content validity of 49 indicators of the NOC outcome, Knowledge: Heart Failure Management, and five new indicators identified through the validation process based on nurse experts' opinions.
Implications for the Nursing Practice: These findings provide evidence-based indicators for the measurement of heart failure patients' knowledge about disease management. As a result, nurses can test the effectiveness of nursing interventions based on valid outcome indicators.
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