Reproducibility of the GRBAS Scale for Dysphonia When Used by Experienced Speech-Language Pathologists

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  • Kozaki Akihiro
    Department of Otolaryngology-Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences
  • Sanuki Tetsuji
    Department of Otolaryngology-Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences
  • Takemoto Naoki
    Department of Otolaryngology-Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences
  • Otani Takahiro
    Department of Public Health, Nagoya City University Graduate School of Medical Sciences
  • Iwasaki Shinichi
    Department of Otolaryngology-Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences

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Other Title
  • 熟練評価者によるGRBAS尺度の再現性に関する検討

Abstract

<p>The reproducibility of the GRBAS (Grade, Roughness, Breathiness, Asthenia, Strain) perceptual evaluation scale for dysphonia depends on the skill level of the examiner. Reproducibility is considered low among different examiners and within a single examiner. In this study, three speech-language pathologists (SLPs) with at least 10 years of practical experience in vocal disorders were recruited to use the GRBAS scale to evaluate the recorded voices of 74 patients with speech disorders. After 2 months, the voices were randomized again and reevaluated. For the intra-rater reliability evaluation, the coincidence between the first and second scores was examined. Reliability among the three examiners' scores was evaluated by the degree of coincidence of the three SLPs' scores. All intra-rater parameters were generally consistent, but the R and S parameters were inconsistent among the different examiners. As the intra-rater degree of coincidence was high, evaluation by the same examiner may be useful. In contrast, the degree of coincidence among the different examiners' scores was not reliable, as the evaluations of multiple parameters differed between experienced SLPs. In future, it will be necessary to develop a more objective evaluation scale than the GRBAS scale.</p>

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