Prediction of Short-Term Outcome in Acute Superior Vestibular Nerve Failure: Three-Dimensional Video-Head-Impulse Test and Caloric Irrigation

Table 2

Quantitative data.

Variable		Group I	Group II	Group III	Significant differences
		mean ± std	mean ± std	mean ± std	I versus II	I versus III	II versus III
Basic
Age [years]		64 ± 17	63 ± 17	53 ± 16
Days to admission		2.6 ± 2.0	3.2 ± 2.6	2.7 ± 1.9
Days in clinic		3.6 ± 1.5	5.1 ± 3.0	6.0 ± 1.5		×
DHI		32 ± 20	39 ± 29	50 ± 27
Tests
SVV [°]		0.3 ± 1.65	3.3 ± 5.2	7.1 ± 5.3		×
OT [°]	ipsi	7.5 ± 2.9	13.2 ± 7.1	15.8 ± 7.6		×
OT [°]	contra	6.6 ± 4.3	1.1 ± 8.8	−3.5 ± 6.2		×
SPN [°/s]		−0.6 ± 3.5	−3.3 ± 4.2	−6.4 ± 5.7		×
Caloric
UW [%]		41 ± 20	48 ± 16	63 ± 25		×
DP [%]		34 ± 39	83 ± 61	152 ± 82		×
vHIT
Gain LC	ipsi	0.97 ± 0.16	0.65 ± 0.29	0.36 ± 0.18		×	×
Gain LC	contra	0.96 ± 0,12	1.03 ± 0.23	0.87 ± 0.17
Gain AC	ipsi	0.93 ± 0.15	1.02 ± 0.21	0.53 ± 0.18		×	×
Gain AC	contra	1.03 ± 0.20	0.99 ± 0.25	1.02 ± 0.20
Gain PC	ipsi	1.05 ± 0.28	1.05 ± 0.28	1.03 ± 0.19
Gain PC	contra	1.05 ± 0.19	1.04 ± 0.29	0.97 ± 0.25
SD LC		0.07 ± 0.05	0.27 ± 0.05	0.47 ± 0.16		×	×
SD AC		0.08 ± 0.04	0.11 ± 0.05	0.34 ± 0.15		×	×
SD PC		0.13 ± 0.10	0.11 ± 0.09	0.16 ± 0.10
LC Vel [°/s]	ipsi	218 ± 37	216 ± 39	232 ± 35
LC Vel [°/s]	contra	205 ± 39	224 ± 40	218 ± 39
AC Vel [°/s]	ipsi	129 ± 27	123 ± 27	158 ± 31			×
AC Vel [°/s]	contra	133 ± 25	137 ± 26	137 ± 29
PC Vel [°/s]	ipsi	125 ± 26	128 ± 29	138 ± 26
PC Vel [°/s]	contra	127 ± 26	131 ± 28	138 ± 31

Quantified data are shown for groups I to III as mean standard deviation (std). To the right the significant differences (, Kruskal-Wallis test) of intergroup comparison are indicated by an ×.
DHI: dizziness handicap inventory, SVV: subjective visual vertical, OT: ocular torsion, SPN: slow phase velocity of the SPN in the dark, UW: unilateral weakness of caloric irrigation, DP: directional preponderance of caloric irrigation, vHIT: video-head-impulse test; LC: lateral SCC, AC: anterior SCC, PC: posterior SCC, Vel: maximal stimulus velocity applied during the vHIT, SD: side difference of the vHIT. The measurement side is given in respect to the lesion side (ipsi: ipsilesional, contra: contralesional).