TABLE 2.
Sensitivity, specificity, NPVs, and percent correctly diagnosed with depression for the GDS-15 in nonelderly (age <65), young-elderly (age 65-75), and old-elderly (age >75) PD patients
| Cut-off |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2/3 |
3/4 |
4/5 |
5/6 |
6/7 |
|||||||||||
| Nonelderly | Young-elderly | Old-elderly | Nonelderly | Young-elderly | Old-elderly | Nonelderly | Young-elderly | Old-elderly | Nonelderly | Young-elderly | Old-elderly | Nonelderly | Young-elderly | Old-elderly | |
| Seasitivity | 0.95 | 0.96 | 1.00 | 0.90 | 0.93 | 0.95 | 0.85 | 0.89 | 0.90 | 0.80 | 0.82 | 0.90 | 0.65 | 0.74 | 0.85 |
| Specificity | 0.60 | 0.51 | 0.49 | 0.78 | 0.67 | 0.72 | 0.84 | 0.82 | 0.85 | 0.92 | 0.84 | 0.90 | 0.95 | 0.90 | 0.97 |
| NPV | 0.96 | 0.95 | 1.00 | 0.94 | 0.94 | 0.98 | 0.91 | 0.89 | 0.96 | 0.90 | 0.87 | 0.96 | 0.83 | 0.85 | 0.95 |
| % Correctly diagnosed | 72 | 74 | 62 | 82 | 84 | 78 | 84 | 83 | 86 | 88 | 83 | 90 | 84 | 85 | 94 |
NPVs, negative predictive values; GDS-15, 15-Item Geriatric Depression Scale; PD, Parkinson’s disease.