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Table 7 Inter-Clinician Reliability of Symptoms on the USDRS

From: Adductor focal laryngeal Dystonia: correlation between clinicians’ ratings and subjects’ perception of Dysphonia

Perceptual Rating Interclass Correlation Coefficient F Test Significance
Severity of Dysphonia 0.939 <0.001*
Roughness 0.840 <0.001*
Breathiness 0.444 0.003*
Strain-Strangled Quality 0.849 <0.001*
Abrupt Voice Initiation 0.755 <0.001*
Voice Arrest 0.413 0.007*
Aphonia 0.241 0.098
Voice Tremor 0.903 <0.001*
Increased Expiratory Effort 0.809 <0.001*
Speech Rate 0.694 <0.001*
Intelligibility 0.688 <0.001*
  1. Note: All clinician ratings were made during review of the video recording of the Rainbow Passage and description of the Cookie Theft picture
  2. *The reliability of clinician ratings of perceptual symptoms was statistically significant at the .01 level