Cross-cultural validation of the Cardiac Depression Scale in Iran

Wiley: 12 months
Publication Type:
Journal Article
British Journal of Clinical Psychology, 2010, 49 (4), pp. 517 - 528
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Background: The Cardiac Depression Scale (CDS) is a disease-specific instrument for measuring depression in cardiac patients. This study was designed to validate the CDS in an Iranian population. Methods: Translation and back translation of the 26- Item CDS scale was performed using recommended procedures. The Iranian translation of the CDS (I-CDS) was administered to 261 individuals in Iran, concurrently with the Beck Depression Inventory. The factor structure of the I-CDS was examined using exploratory factor analysis procedures to enable comparison with previous psychometric evaluation of the CDS. Receiver operating characteristic (ROC) curves were used to examine the ability of the I-CDS to discriminate between categories of depression. Results: First-order exploratory factor analysis uncovered two robust factors, consistent with the second-order dimensions originally reported by the developers of this instrument. Cronbachâs alpha was 0.88 for the total 26-item I-CDS, indicating satisfactory internal consistency of the I-CDS. Intercorrelation between the total scores for the I-CDS and BDI was 0 .62 (P< .001). For the I-CDS cut off of 90, the sensitivity was 85%, and specificity was 61% with a computed area under the curve (AUC) of .81 (95% CI, .76- .87). For the I-CDS cut off of 100, the sensitivity was 81% and specificity was 63% with a computed AUC of .81 (95% CI, .76- .87). Conclusion: This validation study of the Iranian version of the CDS proved that it is an acceptable, a reliable and valid measure of depression in cardiac patients.
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