All of them used VHI for patients with different voice disorders but there are only two studies compared patients group with control group ( 29, 36). Nowadays translation and adaptation has been done on the VHI into many languages including German ( 34), Chinese ( 35), Portuguese ( 36), and Polish ( 37). In addition, the Agency of Healthcare Research and Quality in 2012 announced the VHI as a valid and reliable diagnostic instrument ( 33). Although all of these questionnaires were valuable but VHI was more accepted and has been used widely in evaluation of outcome of treatments at clinics and in research. There are several instruments to assess subjective self-assessment of voice disorders such as the Voice Symptom Scale (VoiSS) ( 30), the Voice Related Quality of Life Measure (V-RQOL) ( 31), the Vocal Performance Questionnaire (VPQ) ( 32), and the Voice Handicap Index (VHI) ( 12). The experienced disability resulted from voice disorder is affected by several factors including occupation, psychological mood, social interactions, and individual’s routine functions ( 29). Although many studies have indicated that objective measurements are of valuable importance in diagnosis voice disorders however those are not applicable to evaluate patients self-assessment of the range of their disability ( 28). acoustic and aerodynamic) and VHI scores ( 24– 26), it is widely applied as a useful instrument to evaluate patient’s self-perception from their severity of voice disorder, its effect on their life and also therapy outcomes ( 27). It is remarkable that despite of lack of the strong relationship between objective voice evaluations (e.g. It is a valid and reliable instrument for assessing self-perception of patient’s voice handicap ( 12), which has been translated and validated into many languages ( 13– 23). Patients with severe voice disorder would gain higher total VHI scores, which the highest score can be 120. ( 12) that consists of three domains including functional, physical, and emotional aspects of voice disorders and is administered by patients themselves regardless to the type of their voice disorder in a five-point Likert-type scale manner for each item (from 0 = never to 4 = always). The VHI was developed and validated by Jacobson et al.

Although there are several tests to do it but one of the most conventional is Voice Handicap Index ( 14).

In a more specific view to health, it is true also regards to the speech disorders that despite of numerous objective evaluations to assess speech behavior in adults ( 6, 7) or children ( 8, 9, 10), however the importance of subjective questions to evaluate the speech and in a more details voice disorders, using patient-centered measures have been asserted in some studies ( 11– 13). A common method in order to evaluate quality of life is questionnaires, which the developed English ones are usually translated and adapted to be applicable according to the other cultures and languages ( 4, 5). According to the World Health Organization (WHO), the assessing of health and before-after therapy outcomes are not sufficient for indicating the severity of disease, rather evaluation of quality of life is essential as a complementary assessment ( 1– 3).

English to chinese voice