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Evaluation of diagnostic audiometric tests.

S Jerger, J Jerger

    Audiology : Official Organ of the International Society of Audiology
    |January 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

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    Evaluating five audiometric tests for hearing disorders, this study found acoustic reflexes and Békésy audiometry showed good diagnostic value. While no single test was definitively superior, the suprathreshold adaptation test was less efficient.

    Area of Science:

    • Audiology
    • Neurotology
    • Diagnostic Medicine

    Background:

    • Accurate diagnosis of eighth nerve and cochlear disorders is crucial for effective treatment.
    • Several audiometric procedures are used, but their comparative diagnostic efficacy requires rigorous evaluation.

    Purpose of the Study:

    • To critically evaluate five diagnostic audiometric procedures for differentiating eighth nerve and cochlear disorders.
    • To assess the sensitivity, specificity, predictive value, and efficiency of these tests using decision matrix and information theory analyses.

    Main Methods:

    • Decision matrix analysis and information theory analysis were employed.
    • Five diagnostic procedures were tested: acoustic reflexes, performance-intensity functions for monosyllabic words, Békésy audiometry, Békésy comfortable loudness audiometry, and suprathreshold adaptation test.

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  • Subjects included 20 patients with confirmed eighth nerve disorders and 20 with presumed cochlear disorders.

    • Main Results:

    • Sensitivity for eighth nerve site identification ranged from 45-85%, with specificity from 70-100%.
    • Positive test results increased the probability of eighth nerve disorder from 50% to 74-100%; negative results decreased it to 18-38%.
    • The suprathreshold adaptation test demonstrated lower efficiency compared to the other four procedures.

    Conclusions:

    • While relative differences in diagnostic effectiveness among the tested procedures were not pronounced, they offer valuable information for differentiating auditory pathway disorders.
    • A combination of tests likely provides the most comprehensive diagnostic information.
    • The suprathreshold adaptation test, particularly at specific frequencies, appears less effective than other evaluated methods.