. 2026 Sep 14;17:1893212. doi: 10.3389/fneur.2026.1893212

Table 2.

Classification correspondence between caloric canal paresis thresholds and vHIT-defined unilateral vestibular dysfunction.

vHIT classification	CP normal	CP abnormal	Sensitivity	Specificity
Cut-off value: 25%
Symptomatic vHIT-normal group	1,215	274	0.959 (95% CI, 0.913–0.981)	0.816 (95% CI, 0.795–0.835)
vHIT-defined unilateral vestibular dysfunction	6	139	0.959 (95% CI, 0.913–0.981)	0.816 (95% CI, 0.795–0.835)
Cut-off value: 30%
Symptomatic vHIT-normal group	1,291	198	0.945 (95% CI, 0.895–0.972)	0.867 (95% CI, 0.849–0.883)
vHIT-defined unilateral vestibular dysfunction	8	137	0.945 (95% CI, 0.895–0.972)	0.867 (95% CI, 0.849–0.883)
Cut-off value: 34%
Symptomatic vHIT-normal group	1,335	154	0.883 (95% CI, 0.820–0.925)	0.897 (95% CI, 0.880–0.911)
vHIT-defined unilateral vestibular dysfunction	17	128	0.883 (95% CI, 0.820–0.925)	0.897 (95% CI, 0.880–0.911)

Classification outcomes are shown for the conventional CP threshold of 25%, the Youden’s index-derived threshold of 30%, and the sensitivity-specificity intersection threshold of 34%, using vHIT-defined unilateral vestibular dysfunction as the reference classification. CP-abnormal/vHIT-normal cases and CP-normal/vHIT-defined unilateral vestibular dysfunction cases indicate discordant classifications and should not be interpreted as definitive diagnostic misclassifications for AUVP because vHIT was not used as an independent disease reference standard. AUVP, acute unilateral vestibulopathy; CP, canal paresis; vHIT, video head impulse test; CI, confidence interval.