Validation of a French translation of the speech, spatial, and qualities of hearing scale (SSQ) and comparison with other language versions
Résumé
Objective: To adapt and validate a French version of the Speech, Spatial and Qualities of Hearing Scale (SSQ), a subjective evaluation of patients' hearing disability in daily life and to assess SSQ reproducibility across different language versions. Design: The SSQ was translated in accordance with the principles of the "Universalist approach" of cross-cultural adaptation of patient-reported outcome instruments. Scores from a normal-hearing and a hearing-impaired population were compiled and compared, whenever possible, with data, from the literature, collected using other language versions. Study sample: One hundred normal-hearing subjects and 230 hearing-impaired subjects. Results: Good reproducibility of scores and inter-subject variability were obtained between several language versions, even if scores found using the French version were slightly lower than those obtained using Dutch or English versions. A comparison of factor analysis outcomes between the English and French versions confirmed good conceptual equivalence across languages and robustness of the SSQ for use in international settings. The 3 main subscales (Speech, Spatial and Qualities) confirmed their usefulness in assessing different aspects of hearing disability. Conclusion: This study validated a French-language version of the SSQ and assessed the reproducibility of the SSQ across subject groups, administration modes and different countries/languages, confirming its potential as an international standard for hearing disability evaluation.
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