Table 4.
Diagnostic values of vHIT and caloric testing to differentiate MD from VM.
| Diagnostic values | PPV, % | NPV, % | Sensitivity, % | Specificity, % |
|---|---|---|---|---|
| vHITa | 81% | 36% | 15% | 93% |
| Caloric test (UW ≥ 22%)b | 82% | 55% | 65% | 75% |
| Caloric test (UW ≥ 34%)b | 90% | 52% | 53% | 90% |
MD was analyzed as the reference group.
a
Abnormal horizontal vHIT was defined as a gain <0.8, with the presence of ipsilateral catch-up saccades.
b
Only patients with a normal vHIT were included in these calculations.
vHIT, video head impulse test; MD, definite unilateral Menière’s disease; VM, definite vestibular migraine; PPV, positive predictive value; NPV, negative predictive value.