Abstract
OBJECTIVE: To evaluate intra- and interexaminer variability of the video Head Impulse Test (v-HIT) when assessing all six semicircular canals (SCCs) of two separate v-HIT systems.
STUDY DESIGN: Prospective study.
SETTING: Department of Otolaryngology, Head and Neck Surgery, Aalborg University Hospital, Denmark.
PATIENTS: One hundred twenty healthy subjects.
INTERVENTION: Four separate tests of all six SCCs with either system A or system B. Two examiners tested all subjects twice. Pretest randomization included type of v-HIT system, order of paired SCC testing, as well as initial examiner.
MAIN OUTCOME MEASURE: Gain values and the presence of pathological saccades were registered. Ninety-five percent limits of agreement (LOAs) were calculated for both intra- and interexaminer variability. Adding or subtracting the value from the mean difference achieves the upper and lower bound LOA. Ninety-five percent of the differences lie within these limits.
RESULTS: Interexaminer reliability: System A: LOAs between 0.13 and 0.24 for the horizontal SCCs and between 0.42 and 0.74 for the vertical SCCs. System B: LOAs between 0.09 and 0.13 for the horizontal SCCs and between 0.13 and 0.20 for the vertical SCCs. Intraexaminer reliability: System A: LOAs were 0.19 and 0.14 for the horizontal SCCs and varied from 0.43 to 0.53 for the vertical SCCs. System B: LOAs were 0.14 for the horizontal SCCs and varied from 0.13 to 0.22 for the vertical SCCs.
CONCLUSION: Horizontal SCC testing: both v-HIT systems displayed good intra- and interexaminer variability. Vertical SCC testing: System B displayed good intra- and interexaminer variability whereas the opposite was true with system A.
Original language | English |
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Journal | Otology & Neurotology |
Volume | 39 |
Issue number | 2 |
Pages (from-to) | e113-e122 |
Number of pages | 10 |
ISSN | 1531-7129 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- LARP
- RALP
- Semicircular canals
- VOR gain
- Vestibular testing
- Vestibulo-ocular reflex
- Video head impulse test
- v-HIT