Psychometric properties and factor structure of the Greek version of the Cardiac Anxiety Questionnaire (CAQ)

The present study assesses the psychometric properties and factor structure of the Greek version of the Cardiac Anxiety Questionnaire (CAQ). The questionnaire was administered to 598 healthy individuals from 15 different regions of Greece with a measure of socioeconomic characteristics and the Symptom Checklist-90-Revised (SCL-90-R). The sample was split into two random halves, and exploratory factor analysis indicated a three-factor solution. This solution was tested using a confirmatory factor analysis on the second half of the sample. In terms of latent dimensions, the Greek version retains the three-factor structure as proposed by the initial authors. However, adequate fit was achieved only after omitting eight items. The shorter (10-item) version was submitted to further analysis. The shorter version provided satisfactory internal reliability and evidence indicating the validity of the scale with respect to SCL-90-R subscales. The stability of the questionnaire was verified by a high test-retest reliability over a 3-mo. period (r = .86). Sex and age differences were assessed. The 10-item version appears to be a practical, brief tool for clinical use.