Key result
CAV-Instrument demonstrates satisfactory internal consistency with a ~0.70 Cronbach's alpha in heart valve disease.
Why the study?
An instrument to measure beliefs and attitudes of heart valve disease patients concerning their illness and treatment required verification of content validity and reliability.
May aid assessment of beliefs in valve disease patients; extends available instruments while leaving clinical adoption open.
The objective of this study was to verify content validity and reliability of "CAV-Instrument" -- an instrument to measure beliefs and attitudes of heart valve disease patients concerning their illness and treatment. The instrument was analyzed by three judges (using predetermined criteria) and submitted to the pretest (n = 17 subjects). The majority of the items were evaluated as adequate regarding their pertinence, clearness and significance regarding the analyzed questions. The pretest showed the necessity for small changes in some statements, which optimized instrument comprehension by the patients. The restructured instrument was applied to 46 patients to verify internal consistency. The whole instrument and most of its scales presented satisfactory internal consistency. It is concluded that the instrument has content validity and is internally consistent, ratifying the adequacy of its application to measure the strength of association among the researched variables.
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Padilha et al. (2004) studied Heart valve disease (n=46). CAV-Instrument was evaluated on Global internal consistency (Cronbach's alpha). The CAV-Instrument demonstrated satisfactory content validity and internal consistency, achieving a global Cronbach's alpha of 0.70 for measuring beliefs and attitudes in heart valve disease patients.
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