Test-retest and Interrater Reliability of the Video Head Impulse Test in the Pediatric Population.

Objective: Determine reliability of horizontal and vertical video head impulse test (vHIT) and effect of maturation on angular vestibular ocular reflex (AVOR) gain estimations and peak head velocities of individual canals in typically developing children and adolescents. Design: Reliability study. Setting: University research laboratory Subjects: Two normal adults mean age 51.5 +/- 0.5 years and 28 typically developing children and adolescents mean age 10 +/- 3.5 years (range, 4.33-17.25 years). Main Outcome Measures: Mean AVOR gain estimate and peak head impulse velocity for individual canals. Results: In adult sample, mean AVOR gain estimates were 1.00 to 1.04 for lateral and 1.07 to 1.13 for vertical canals. In pediatric sample, mean AVOR gain estimates were 1.00 to 1.04 for lateral and 1.03 to 1.08 vertical canals. Mean AVOR gain intrarater reliability scores (intraclass correlation coefficient [ICC] >= 0.821 = 0.800

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