A Novel Laryngeal Palpatory Scale (LPS) in Patients with Muscle Tension Dysphonia |
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| Institution: | 2. Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium;3. ENT and Head and Neck Research Center and Department, Iran University of Medical Science, Tehran, Iran;4. Behavioral Sciences Research Center, Life Style Institute, Faculty of Nursing, Baqiyatallah University of Medical Sciences, Tehran, Iran;5. Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran;11. Institute of Cellular Medicine, Faculty of Medical Sciences, Newcastle University Newcastle, United Kingdom;2. Polyclinic for the Rehabilitation of People with Disabilities, Split, Croatia;2. Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran;3. Otolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran;2. Department of Surgery, Division of Otolaryngology – Head & Neck Surgery, Penn State Health: Milton S. Hershey Medical Center, Hershey, Pennsylvania;3. Department of Surgery, Division of Otolaryngology – Head & Neck Surgery, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia;4. Department of Otolaryngology – Head & Neck Surgery, Drexel University College of Medicine, Philadelphia, Pennsylvania;2. University of Pittsburgh School of Medicine, Division of Internal Medicine, Pittsburgh, Pennsylvania;3. Emory University, Department of Otolaryngology, Atlanta, Georgia;4. University of Pittsburgh Medical Center, Department of Otolaryngology, Pittsburgh, Pennsylvania;2. Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran;3. Department of Ear, Nose, Throat, Head and Neck Research Center, Hazrat-e-Rasoul Hospital, Iran University of Medical Sciences, Tehran, Iran |
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| Abstract: | ObjectivesLaryngeal palpation is a routine clinical method for evaluation of patients with muscle tension dysphonia (MTD). The aim of this study was to develop a new comprehensive valid and reliable “laryngeal palpatory scale” (LPS), based on psychometric criteria.MethodsThe scale items were selected based on an in-depth analysis of the literature and an expert focus group. Scale item generation and item reduction were followed by a psychometric assessment. Qualitative and quantitative content validity (the content validity ratio (CVR), content validity index (CVI)), the qualitative face validity, and the inter-rater reliability were determined. For this purpose, 531 patients were assessed and finally 55 patients with primary MTD (26 women, mean age: 40.8 years, SD: 12.5; 29 male, mean age: 41.6 years, SD: 11.8) participated in the study. A weighted kappa (k*) statistic was used to examine the inter-rater reliability for each single item.ResultsBased on the CVR, three items were omitted because they had a score of less than 0.62. The CVI for all remaining items was greater than 0.79 and the scale CVI was equal to 0.96. The final 45 items were a result of the study. The inter-rater reliability for each single item ranged from 0.41 to 1, indicating moderate to almost perfect agreement.ConclusionsThe LPS is a reliable and valid instrument for assessing patients with MTD. However, future studies are needed to provide adequate data on sensitivity, specificity, concurrent validity, and cutoff scores. |
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