Acute Coronary Syndrome Response Index: Cultural Adaptation and Evaluation of Measurement Properties - Brazilian Version

Objective: to conduct the cultural adaptation and evaluate the measurement properties of the Brazilian version of the Acute Coronary Syndrome Response Index. Method: a methodological study was conducted with adults of both sexes diagnosed with coronary artery disease. Individuals with an inability to understand Portuguese, significant hearing deficits, or those disoriented were excluded. Data were collected from November 2020 to August 2022 at a university hospital in the state of São Paulo. The cultural adaptation followed the steps recommended in the literature. The measurement properties were assessed in a sample of 244 individuals, testing the reliability and the face, content, construct, and structural validity. Results: the Brazilian version of the instrument retained semantic, idiomatic, conceptual, and cultural equivalences similar to the original version. The internal consistency results for the subscales were: KR-20 of 0.399 for the Knowledge subscale, and Cronbach’s alpha of 0.735 and 0.577 for the Attitudes and Beliefs subscales, respectively. Confirmatory factor analysis results indicated adequate fit indices to the original model of three subscales (Knowledge, Attitudes, and Beliefs). Convergent construct validity showed a weak but positive correlation between the Knowledge and Beliefs subscales and between the Knowledge and Attitudes subscales. Conclusion: the Brazilian version preserved textual equivalences, face, content, and construct validity and showed an adequate fit to the original model when applied to individuals with coronary artery disease treated at a public and teaching hospital. Additional studies in different health institutions and with samples of varying characteristics are recommended.