口干问卷中文版对鼻咽癌放疗患者评价效度和信度调查

摘要

Objective To evaluate the validity and reliability of the Chinese version of Xerostomia Questionnaire ( XQ-C) in nasopharyngeal carcinoma patients treated with radiotherapy. Methods XQ-C was translated according to the International Quality of Life Assessment project approach. Patients with nasopharyngeal carcinoma in different radiotherapy stages were enrolled in this study and assessed by using the XQ-C. The validity and reliability of the questionnaire results were evaluated. The content validity was assessed by experts grading method. The construct validity was assessed by exploratory factor analysis. The discriminant validity was determined by non-parametric method. The reliability was evaluated by Cronbach′s α and split-half reliability to assess the internal consistency. Results A total of 212 questionnaires were completely filled out. Content validity showed that the item content validity index ( I-CVI) ≥0.80, Scale-CVI/Ave=0.97, and P value of Kendall′s W test was 0.701. Exploratory factor analysis revealed that XQ-C was a unidimensional scale. The scale scores of patients at different stages of radiotherapy significantly differed, suggesting that the discriminant validity was good. Cronbach′s α of the scale was 0.951 and Guttman′s semi-reliability coefficient was 0.940. Conclusion The XQ-C is valid and reliable, which can be widely applied in the clinical diagnosis, treatment and research of xerostomia in Chinese nasopharyngeal carcinoma patients after radiotherapy.%目的 评价口干问卷中文版(XQ-C)对鼻咽癌放疗患者的效度和信度.方法 根据国际生命质量评价项目的标准程序进行XQ-C的制作,对不同放疗阶段的鼻咽癌患者进行问卷调查,对问卷结果进行效度和信度检验,内容效度采用专家评价法,结构效度采用探索性因子分析,区分效度采用非参数检验,信度检验采用克朗巴赫系数(Cronbach′s α)和分半信度进行内部一致性评价.结果回收有效问卷212份,内容效度I-CVI均≥0.80,S-CVI/Ave=0.97,Kendall′s W一致性检验P=0.701;探索性因子分析显示XQ-C为单一维度量表;不同放疗阶段患者的量表评分不同即区分效度良好;信度检验示Cronbach′s α系数=0.951,Guttman分半信度系数为0.940.结论 中文版口干问卷具有良好的效度和信度,可推广用于我国鼻咽癌患者放疗后口腔干燥症的临床诊疗和研究中.