Salehimanesh Farzaneh, Soltani Majid, Dastoorpoor Maryam, Moradi Negin
Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Musculoskeletal Rehabilitation Research Center, Department of Speech Therapy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
J Voice. 2020 Nov;34(6):965.e1-965.e11. doi: 10.1016/j.jvoice.2019.06.001. Epub 2019 Jul 16.
Voice disorders can affect the quality of life and coping mechanisms and also coping mechanisms can affect the way in which patients deal with their voice problems. People with voice disorders need to use coping strategies to deal with the problems caused by their voice disorder. The purpose of this study was to examine the psychometric properties and cultural adaptation of the Voice Disability Coping Questionnaire in the Iranian population.
The translation and cross-cultural adaptation procedures were performed according to the basic rules and instructions set by the International Quality of Life Assessment Project. Two hundred and forty-eight adults (218 patients with voice disorder and 30 healthy controls) were participated in the study. Face and content validity, clinical validity, and construct validity of the questionnaire were investigated by modern psychometric methods.
Quantitative methods were used to measure content validity and all items were detected applicable. This means that the final version was clear and easy to answer. Clinical validity shows that the Persian version of VDCQ can distinguish between patients and healthy controls (P < 0.001). The construct validity of the VDCQ was tested in a cross-sectional study. The questionnaire was analyzed by exploratory and confirmatory factor analyses. Investigation of initial communality and after extraction of factors by Varimax rotation method showed that the share of items for all items in the questionnaire except item 12, is higher than 0.5. Therefore, item 12 should be removed from the questionnaire (Table 3). Based on the confirmatory factor analysis model, items 2 and 10, whose factor load were less than 0.4, were excluded from the questionnaire (Fig. 1). For reliability the Cronbach's alpha coefficient and ICC were obtained as 0.82 and 0.99, respectively. The results of studying the role of items in the reliability of the VDCQ showed that all items increase internal consistency.
Based on modern statistical analysis conducted in this study, the original 15 item questionnaire was reduced to 12 item. The 12 item questionnaire is a valid and reliable tool for quantifying coping strategies in people with voice disorder.
嗓音障碍会影响生活质量和应对机制，而应对机制也会影响患者处理嗓音问题的方式。嗓音障碍患者需要运用应对策略来应对由嗓音障碍引发的问题。本研究的目的是检验嗓音残疾应对问卷在伊朗人群中的心理测量特性和文化适应性。
翻译和跨文化适应程序按照国际生活质量评估项目设定的基本规则和说明进行。248名成年人（218名嗓音障碍患者和30名健康对照者）参与了该研究。通过现代心理测量方法对问卷的表面效度、内容效度、临床效度和结构效度进行了调查。
采用定量方法测量内容效度，所有项目均被判定适用。这意味着最终版本清晰易懂。临床效度表明，VDCQ波斯语版能够区分患者和健康对照者（P < 0.001）。VDCQ的结构效度在一项横断面研究中进行了检验。通过探索性和验证性因素分析对问卷进行了分析。对初始共同度以及采用方差最大旋转法提取因素后的分析表明，问卷中除第12项外所有项目的载荷均高于0.5。因此，应从问卷中删除第12项（表3）。基于验证性因素分析模型，将因素载荷小于0.4的第2项和第10项从问卷中排除（图1）。在信度方面，Cronbach's alpha系数和组内相关系数分别为0.82和0.99。对项目在VDCQ信度中的作用进行研究的结果表明，所有项目均提高了内部一致性。
基于本研究中进行的现代统计分析，最初的15项问卷缩减为12项。这一12项问卷是量化嗓音障碍患者应对策略的有效且可靠的工具。
