Clinical psychological tests useful for differentiating depressive state with Alzheimer's disease from major depression of the elderly
Article first published online: 23 JUN 2010
© 2010 The Authors; Journal compilation © 2010 Japanese Psychogeriatric Society
Volume 10, Issue 1, pages 29–33, March 2010
How to Cite
HATTORI, H., YOSHIYAMA, K., MIURA, R. and FUJIE, S. (2010), Clinical psychological tests useful for differentiating depressive state with Alzheimer's disease from major depression of the elderly. Psychogeriatrics, 10: 29–33. doi: 10.1111/j.1479-8301.2010.00308.x
- Issue published online: 23 JUN 2010
- Article first published online: 23 JUN 2010
- Received 19 October 2009; accepted 14 January 2010.
- Alzheimer's disease;
Background: A depressive state with Alzheimer's disease (AD) is difficult to differentiate from major depression (MD) in many cases. The purpose of this study was to identify differences between the two disorders using a battery of clinically available psychological tests.
Methods: We evaluated depression and apathy using the Geriatric Depression Scale consisting of 30 items (GDS30) and Apathy Scale in 38 patients with AD and 31 with MD who were diagnosed based on clinical symptoms and radiological findings. In addition, the Cornel Medical Index (CMI) was employed to compare the psychological features of the two disorders.
Results: In AD patients, the Apathy Scale score was greater than the GDS30 score, suggesting a strong tendency toward apathy. There was a significant difference in the GDS30/Apathy Scale score ratio between the two groups (P < 0.05, OR: 3.11). When examining the downstream mental items of the CMI, the values of tension-category parameters were significantly greater in AD patients, whereas those of depression-category parameters were significantly higher in MD patients. In individual patients, we compared the scores for the two categories, and there was a marked difference (P < 0.001, OR: 10.6).
Conclusion: These results suggest that the GDS30, Apathy Scale, and CMI are useful for differentiating MD from AD and evaluating their psychological features.