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- Title:
Cross-Cultural Adaption and Validation of the Vocal Fatigue Index in German.
- Document type:
- Journal Article
- Author(s):
- Barsties V Latoszek, Ben; Auner, Margrit; Graf, Simone
- Abstract:
- OBJECTIVE: The purpose of the study was to implement a cross-validation and adaption of the Vocal Fatigue Index (VFI) in German language. METHODS: The translation process for the German version (GV) of the VFI passed through three steps of translation before a final version was completed. Study subjects included 100 vocally healthy subjects and 101 voice-disordered subjects with various types of dysphonia. The internal consistency was determined using Cronbach's alpha (cron α) and the item-total analysis. Test-retest reliability was measured with the Pearson correlation coefficient. To assess the validity, the independent sample t test, the receiver-operating characteristic curve, the likelihood ratios, and Youden Index were used. RESULTS: The internal consistency across all three domains were good (#1: cron α = 0.945, #2: cron α = 0.904, and #3: cron α = 0.871) and no item of the GV of the VFI had to be deleted for further analysis relating to the item-total analysis. The test-retest reliability was high to very high (r = 0.86-0.93). Significant higher scores were revealed in voice-disordered subjects in comparison with vocally healthy subjects in all three domains (all Pvalues <0.01). Thresholds for the three domains of the GV of the VFI were determined at ≥15.5 (76.2% sensitivity and 90.0% specificity) for #1, ≥2.5 (71.5% sensitivity and 81.0% specificity) for #2, and ≤7.5 (50.5% sensitivity and 80.0% specificity) for #3. CONCLUSIONS: It can be considered that the VFI is a valid and reliable tool identifying vocal fatigue symptoms and its severity in the German-speaking population.
- Journal title abbreviation:
- J Voice
- Year:
- 2021
- Journal volume:
- 35
- Journal issue:
- 1
- Pages contribution:
- 161.e1-161.e13
- Fulltext / DOI:
- doi:10.1016/j.jvoice.2019.08.003
- Pubmed ID:
- http://view.ncbi.nlm.nih.gov/pubmed/31488316
- Print-ISSN:
- 0892-1997
- TUM Institution:
- Hals-Nasen-Ohrenklinik und Poliklinik
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