Table 3.
Comparison of the classification of the classification and regression trees algorithm with the diagnosis made at the German Center for Vertigo and Balance Disorders (DSGZ) for functional dizziness (FD), vestibular migraine (VM), Menière's disease (MD), benign paroxysmal positional vertigo (BPPV), unilateral vestibulopathy (UVP), bilateral vestibulopathy (BVP), and vestibular paroxysmia (VP).
| Diagnosis by DSGZ | Diagnostic parameters | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FD | VM | MD | BPPV | UVP | BVP | VP | SENS (%) | SPEC (%) | PPV (%) | NPV (%) | ||
| Diagnosis by classification algorithm | FD | 146 | 41 | 5 | 8 | 14 | 7 | 2 | 42.2 | 57.8 | 65.5 | 34.5 |
| VM | 63 | 84 | 22 | 22 | 16 | 6 | 6 | 39.1 | 60.9 | 38.4 | 61.6 | |
| MD | 30 | 28 | 70 | 7 | 15 | 9 | 0 | 49.3 | 50.7 | 44.0 | 56.0 | |
| BPPV | 36 | 17 | 20 | 76 | 13 | 11 | 12 | 56.7 | 43.3 | 41.1 | 58.9 | |
| UVP | 8 | 11 | 4 | 12 | 23 | 0 | 1 | 20.2 | 79.8 | 39.0 | 61.0 | |
| BVP | 43 | 17 | 19 | 6 | 28 | 32 | 9 | 48.5 | 51.5 | 20.8 | 79.2 | |
| VP | 20 | 17 | 2 | 3 | 5 | 1 | 19 | 38.8 | 61.2 | 28.4 | 71.6 | |
Performance is described by SENS, sensitivity; SPEC, specificity; PPV, positive predictive value, and NPV, negative predictive value.