Table 6.
Classification accuracy of the index test for classifying aphasia, dysarthria, and cognitive dysfunction
| STAD | Area under the curve | Optimal cutoff | Sensitivity Specificity | Positive likelihood ratioa | Negative likelihood ratiob |
|---|---|---|---|---|---|
| Verbal section | 0.910 | 14.5 | 0.924 0.779 | 4.19 | 0.098 |
| Articulation section | 0.868 | 6.5 | 0.922 0.769 | 3.99 | 0.101 |
| Nonverbal section | 0.860 | 5.5 | 0.821 0.778 | 3.70 | 0.230 |
a
Positive likelihood ratio: sensitivity/(1 − specificity); values of 1 = “neutral,” ≥3 = “moderately,” ≥10 = “very positive.”
b
Negative likelihood ratio: (1 − sensitivity)/specificity; values of 1 = “neutral,” ≤0.30 = “moderately negative,” ≤0.10 = “extremely negative” [56].