The validity of the Beck Depression Inventory as a screening and diagnostic instrument for depression in patients with Parkinson's disease
Article first published online: 17 JAN 2001
Copyright © 2000 Movement Disorder Society
Volume 15, Issue 6, pages 1221–1224, November 2000
How to Cite
Leentjens, A. F. G., Verhey, F. R. J., Luijckx, G.-J. and Troost, J. (2000), The validity of the Beck Depression Inventory as a screening and diagnostic instrument for depression in patients with Parkinson's disease. Mov. Disord., 15: 1221–1224. doi: 10.1002/1531-8257(200011)15:6<1221::AID-MDS1024>3.0.CO;2-H
- Issue published online: 17 JAN 2001
- Article first published online: 17 JAN 2001
- Manuscript Accepted: 10 MAY 2000
- Manuscript Revised: 26 APR 2000
- Manuscript Received: 16 FEB 2000
- Parkinson's disease;
- Beck Depression Inventory (BDI)
To evaluate the validity of the Beck Depression Inventory (BDI) as a screening and diagnostic scale for depression in Parkinson's disease (PD).
PATIENTS AND METHODS
Fifty-three nondemented patients with PD were diagnosed according to a standardized protocol consisting of the depression module of the Structured Clinical Interview for DSM axis I disorders (SCID) and the BDI. A “receiver operating characteristics” (ROC) curve was obtained and the sensitivity, specificity, positive and negative predictive values (PPV and NPV, respectively) were calculated for different cut-off points of the BDI.
Maximum discrimination was obtained with a cut-off score of 13/14. High sensitivity and NPV were obtained with cut-off scores of 8/9 or lower; a high specificity and PPV were obtained with cut-off scores of 16/17 or higher. The area under the ROC curve was 85.67%.
A single cut-off score on the BDI to distinguish nondepressed from depressed patients with PD is not feasible. If one accepts the low specificity, then the BDI can be used as a valid screening instrument for depression in PD with a cut-off of 8/9. With a cut-off score of 16/17, it can be used as a diagnostic scale, at the cost of a low sensitivity. The use of diagnostic criteria for depression remains necessary.