Table 2. Parameters for caloric tests and vHITs according to the subgroup and lesion location.
| Peripheral lesions | Central lesions | p | |
|---|---|---|---|
| Abnormal caloric test group (n=123) | |||
| Prevalence | 105 (85.4) | 18 (14.6) | <0.001 |
| Unilateral caloric paresis subgroup | |||
| Prevalence | 101 (85.6) | 17 (14.4) | <0.001 |
| Caloric paresis, % | 49.7±21.0 | 48.8±21.9 | 0.788 |
| 43 (33–61) | 42 (29–63) | ||
| vHIT gain for the ear with caloric paresis | 1.00±0.08 | 0.94±0.08 | 0.004 |
| 1.03 (0.95–1.07) | 0.91 (0.89–1.02) | ||
| vHIT gain for the healthy ear in the caloric test | 1.03±0.06 | 1.03±0.06 | 0.687 |
| 1.05 (1.00–1.07) | 1.04 (1.01–1.07) | ||
| AI of vHIT gain, % | 3.0±3.3 | 5.3±3.6 | 0.007 |
| 2 (1–4.5) | 6 (2–7.5) | ||
| Abnormal horizontal vHIT group (n=39) | |||
| Prevalence | 20 (54.1) | 19 (45.9) | 0.001 |
| Bilaterally positive vHIT group | |||
| Prevalence | 9 (50.0) | 9 (50.0) | 0.001 |
| Caloric paresis, % | 9.9±6.0 | 7.7±4.5 | 0.489 |
| 9 (4–15.5) | 8 (3–11.5) | ||
| vHIT gain for both ears | 0.69±0.08 | 0.63±0.10 | 0.101 |
| 0.72 (0.63–0.75) | 0.66 (0.62–0.70) | ||
| AI of vHIT gain, % | 4.4±2.30 | 6.1±6.30 | 0.489 |
| 4.0 (3–5) | 3 (2–13) | ||
| Unilaterally positive vHIT group | |||
| Prevalence | 11 (57.9) | 8 (42.1) | 0.491 |
| Caloric paresis, % | 9.6±8.2 | 11.4±7.7 | 0.840 |
| 8 (2–18) | (5–19) | ||
| vHIT gain for weak ear | 0.62±0.18 | 0.69±0.09 | 0.492 |
| 0.69 (0.56–0.73) | 0.71 (0.60–0.78) | ||
| vHIT gain for healthy ear | 0.97±0.11 | 0.92±0.10 | 0.206 |
| 0.93 (0.89–1.07) | 0.87 (0.84–1.03) | ||
| AI of vHIT gain, % | 23.3±20.2 | 14.0±7.2 | 0.395 |
| 14 (9–28.0) | 15 (8–19.5) |
Data are mean±standard deviation and median (interquartile range) or n (%) values. Statistical analysis was not performed for subgroups with bilateral caloric paresis and hyperactive vHIT due to the small number of patients (<5).
AI: asymmetry index, vHIT: video head impulse test.