Federal University of Paraíba (Universidade Federal da Paraíba - UFPB), João Pessoa, PB, Brazil.
Graduate Program in Decision and Health Models, UFPB, João Pessoa, PB, Brazil; Department of Statistic at the UFPB, João Pessoa, PB, Brazil.
J Voice. 2022 Jan;36(1):144.e11-144.e20. doi: 10.1016/j.jvoice.2020.05.001. Epub 2020 Jun 26.
To investigate the psychometric properties of the Brazilian version of the Vocal Tract Discomfort Scale, known as Escala de Desconforto do Trato Vocal (EDTV), based on factor analysis, in patients with dysphonia.
This was a retrospective documentary and cross-sectional study. The study database contained sociodemographic variables, laryngeal diagnosis, auditory-perceptual evaluation and EDTV items. All of these variables were extracted from the medical records of 310 patients seen at the Integrated Laboratory of Voice Studies. A descriptive statistical analysis, exploratory factor analysis (EFA), and confirmatory factor analysis (CFA) were performed.
The sample consisted of patients of both sexes with a mean age of 39.36 (SD = 15.80) years; the majority were female and were nonvoice professionals. The EFA grouped the EDTV items into four factors according to the interitem correlations. The CFA grouped the EDTV items into three factors because the last two factors found in the EFA were correlated and constituted a single factor. Thus, the CFA revealed that the EDTV was organized as follows: Factor 1, "Hybrid," comprised the items corresponding to the frequency and severity of the symptoms of burning, sore, and irritated throat; Factor 2, "Inflammatory process/tissue lesion," comprised the items related to throat itching and throat sensitivity; and Factor 3, "Muscle discomfort," comprised the items related to symptoms of tightness, dryness, and the sensation of a lump in the throat. Item responses are dichotomous (High/Low), and the result is determined by the sum of the responses, in which high frequency/severity is assigned two points and reduced frequency/severity assigned one point.
The CFA allows the proposal of an adjustment to the EDTV and suggests that the described changes be made to the instrument to make it a scale with three factors that behave differently but are related.
通过因子分析，研究巴西版嗓音不适量表（Escala de Desconforto do Trato Vocal，EDTV）在嗓音障碍患者中的心理测量特性。
这是一项回顾性文献和横断面研究。研究数据库包含社会人口统计学变量、喉诊断、听觉感知评估和 EDTV 项目。所有这些变量均从嗓音综合研究实验室的 310 名患者的病历中提取。进行描述性统计分析、探索性因子分析（EFA）和验证性因子分析（CFA）。
样本由男女患者组成，平均年龄为 39.36（SD=15.80）岁；大多数为女性，非嗓音专业人士。EFA 根据项目间相关性将 EDTV 项目分为四个因子。CFA 将 EDTV 项目分为三个因子，因为 EFA 中发现的最后两个因子是相关的，构成了一个单一的因子。因此，CFA 表明 EDTV 如下组织：因子 1“混合”由与燃烧、疼痛和喉咙刺激症状的频率和严重程度相对应的项目组成；因子 2“炎症过程/组织损伤”由与喉咙瘙痒和喉咙敏感度相关的项目组成；因子 3“肌肉不适”由与紧绷、干燥和喉咙有异物感相关的症状的项目组成。项目反应是二项式（高/低），结果由反应的总和确定，其中高频/严重程度分配为 2 分，低频/严重程度分配为 1 分。
CFA 允许对 EDTV 进行调整，并建议对仪器进行描述性变更，使其成为一个具有三个因子的量表，这些因子具有不同的行为但相关。
