Validation and translation of the Dutch Tinnitus Functional Index
S. Rabau , K. Wouters and P. Van de Heyning 1,2
1University Department of otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem, Belgium; Faculty of Medicine and Health Sciences, Campus Drie Eiken, University of Antwerp, Antwerp, Belgium; 3Department of Scientific Coordination and Biostatistics, Antwerp University Hospital, Edegem, Belgium
Tinnitus, questionnaire, translation, validation, psychometric
251 - 258
Validation and translation of the Dutch Tinnitus Functional Index. Objectives: Several questionnaires are used to survey how tinnitus affects quality of life, making comparisons across studies difficult. The questionnaires also are used to measure treatment outcome but were not designed for this purpose. To address these issues, a new questionnaire has been suggested, the tinnitus functional index (TFI), which is highly responsive to treatment-related change. The current study aim was to translate and validate the TFI for a Dutch-speaking population. Factor analysis was performed to characterize the TFI profile in a large tinnitus population. Methods: The questionnaire was translated using a translation-back translation procedure, and 263 patients in the ENT department of Antwerp University Hospital with tinnitus-related complaints completed it. Factor structure was assessed using exploratory analysis with oblique rotation and compared with the original questionnaire. Internal consistency was measured using Cronbachs alpha coefficient.Spearmancorrelations with thepercentageof timeawareof the tinnitus and the visual analogue scales (VAS) for maximum tinnitus loudness and mean tinnitus loudness were calculated to investigate convergent validity. Results: The original eight-factor structure could be confirmed in the Dutch version of the TFI. Internal consistency (a=0.96) and convergent validity showed good results. Statistically significant correlations were found with the VAS for maximum loudness (r =0.59; p<0.001), VAS for mean loudness (r=0.66; p<0.001), and percentage of time aware of tinnitus (r=0.58; p<0.001). Conclusions: The Dutch version of the TFI is suitable for measuring in clinical and research settings how tinnitus affects daily life, with psychometric properties in line with the original version.
Vol. 10, 2014, 4th trimester

Validation and translation of the Dutch Tinnitus Functional Index