Transcultural Adaptation and Validation of the German Version of the Vocal Tract Discomfort Scale

Vocal Tract Discomfort Scale: Validation of the Argentine Version

“…In this study, 60% of the population reveals a secondary pathology (MTD II), as opposed to the data present in Rodrigues 26 and Lukaschyk's 19 studies, where there are more references to functional dysphonia. Torabi 28 and his team made no differentiation in the cases of MTD, 12 and Woznicka 29 only referred to occupational dysphonia cases.…”

“…The Scale did not allow us to differentiate between primary and secondary MTD cases, 19−28 but it did allow us to see the changes before and after therapy. 19−28 The internal consistency measured by using Cronbach's alpha was in our case lower than the one found in the adaptations of the Italian 27 and German 19 versions, whose values exceeded 0.90.…”

“…The scores for each subscale of frequency and severity were estimated in order to get a total score for the VTD 10 Scale clinical evaluation, values ranging from 0 to 48 for each subscale, amounting to a total score of 96. 19 The internal consistency of the EDTV 17 was assessed using Cronbach's alpha coefficient. 20 The minimum acceptable value is 0.70; the internal consistency of the scale under that value is considered low.…”

“…This finding coincides with the one in the German version, in which the most frequent symptoms mentioned were dryness, irritation, and lump in the throat symptom, both in people with dysphonia and in the group of "healthy" people with heavy vocal load. 19 As stated by Carvajal, 30 the instruments intended to measure a construct can be indirectly validated according to the…”

Aplicación de la Escala de disconfort del tracto vocal en detección, diagnóstico y terapéutica de la voz.

“…La escala VTD ha sido traducida al polaco ( 6), al portugués de Brasil (7), al alemán (8), al italiano (9), al árabe (10), al coreano (11), al persa (12) y se encuentra en proceso de adaptación al noruego. Al utilizarse instrumentos mundialmente aceptados, se abre la posibilidad de efectuar estudios entre diferentes países o culturas.…”