A newly developed unidimensional composite measure of neuropsychological functioning for older cardiac surgery patients demonstrated high reliability and internal consistency.
May aid neuropsychological assessment in cardiac surgery research; hypothesis-generating and should not yet change practice.
The objective of this analysis was to develop a measure of neuropsychological performance for cardiac surgery and to assess its psychometric properties. Older patients (n = 210) underwent a neuropsychological battery using nine assessments. The number of factors was identified with variable reduction methods. Factor analysis methods based on item response theory were used to evaluate the measure. Modified parallel analysis supported a single factor, and the battery formed an internally consistent set (coefficient alpha = .82). The developed measure provided a reliable, continuous measure (reliability > .90) across a broad range of performance (-1.5 SDs to +1.0 SDs) with minimal ceiling and floor effects.
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Jones et al. (2010) studied this question.
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