Table 2.
Results of three types of vertical position induction tests.
| Variables | Variable level | D-HT | Half D-HT | SHH | Row total | Test method | Statistics | P-value |
|---|---|---|---|---|---|---|---|---|
| Torsional nystagmus | Upbeating | 8 (17.39) | 7 (15.22) | 15 (32.61) | 30 (21.74) | Chi-Squared test | 20.646 | <0.001 |
| Upbeating and torsional | 37 (80.43) | 24 (52.17) | 24 (52.17) | 85 (61.59) | ||||
| Others | 1 (2.17) | 15 (32.61) | 7 (15.22) | 23 (16.67) | ||||
| Reverse phase nystagmus | Yes | 26 (56.52) | 25 (54.35) | 23 (50.00) | 74 (53.62) | Fisher's exact test | – | 0.156 |
| No | 20 (43.48) | 16 (34.78) | 18 (39.13) | 54 (39.13) | ||||
| Without nystagmus | 0 (0.00) | 5 (10.87) | 5 (10.87) | 10 (7.25) | ||||
| Latency (s) | Mean ± SD | 1.53 ± 0.76 | 2.55 ± 0.83a | 2.46 ± 0.86a | 2.13 ± 0.94 | One-way Anova analysis | 19.075 | <0.001 |
| SPV (°/ s) | Median (IQR) | 22.0 (17.0, 31.0) | 17.0 (10.0, 23.0)a | 21.0 (15.0, 28.0)b | 20.0 (15.0, 29.0) | Kruskal-Wallis test | 6.923 | 0.031 |
Compared with D-HT, aP <0.05.
Compared with Half D-HT, bP <0.05.