(Answered) Muscle tension dysphonia mtd can masquerade as adductor

Statistics

Muscle tension dysphonia (MTD) can masquerade as adductor spasmodic dysphonia (ADSD), leading to diagnostic confusion. An investigation assessed the diagnostic worth of acoustic analysis of phonatory breaks (PB) as a possible objective test to distinguish ADSD from MTD.

Acoustic Analysis of Phonatory Breaks to Test for ADSD and MTD (n=100)

Reference StandardTest OutcomeHas ADSDHas MTDPositive (PB≥40 ms)35

True Positive (TP)40

False Positive (FP) Negative (PB<40 ms)16

False Negative (FN)22

True Negative (TN)

Calculate the sensitivity, specificity, positive predictive value, and negative predictive value. Please interpret each result.

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