Interlaboratory variability of rotational chair test results II: Analysis of simulated data

Joseph M. Furman, Joel A. Goebel, Jason Hanson, Timothy Schumann

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Standardization of rotational chair testing across laboratories has not been achieved because of differences in test protocol and analysis algorithms. The Interlaboratory Rotational Chair Study Group was formed to investigate these differences. Its first study demonstrated significant variability in calculated results using actual patient data files. No estimation of accuracy could be made, however, because the 'true' values of response parameters were unknown. In this study we used simulated 'patient' data files to further explore the differences among analysis algorithms. We found a high degree of agreement and accuracy across laboratories using automated analysis of high signal-to-noise/low-artifact data for gain, phase, and asymmetry. Variability increased significantly for the lower signal-to- noise ratio/higher artifact files. Operator intervention generally improved accuracy and decreased variability, but there were cases in which operator intervention reduced accuracy.

Original languageEnglish
Pages (from-to)23-30
Number of pages8
JournalOtolaryngology - Head and Neck Surgery
Issue number1
StatePublished - 2000


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