Postgraduate Program in Adult Health, Universidade Federal do Maranhão, São Luís, MA, Brazil.
Postgraduate Program in Physical Therapy, Universidade Federal de São Carlos, São Carlos, SP, Brazil.
Musculoskelet Sci Pract. 2022 Aug;60:102587. doi: 10.1016/j.msksp.2022.102587. Epub 2022 May 18.
Structural validity refers to the degree to which the scores of a questionnaire or scale are an adequate reflection of the construct to be measured. The aim of this study was to perform the analysis of the structural validity of the Roland-Morris Disability Questionnaire (RMDQ), Oswestry Disability Index (ODI), Quebec Back Pain Disability Scale (QBPDS), and Bournemouth Questionnaire (BQ) in Brazilian respondents with chronic low back pain.
A cross-sectional study was conducted. The sample was composed by respondents with non-specific chronic low back pain (score ≥3 points on the 11-point Numerical Pain Rating Scale). The internal structure (number of domains and items) of the Brazilian versions of the RMDQ, the ODI, the QBPDS, and the BQ were analyzed by the confirmatory factor analysis.
Two hundred and twenty-two patients were included. Most of the sample consisted of women and overweight. The RMDQ and ODI have a one-dimensional structure and acceptable values for all confirmatory factor analysis fit indices. The QBPDS with 4 domains and 20 items showed the best values of the fit indices. In addition, we did not identify an internal structure for the BQ supported by the confirmatory factor analysis.
The ODI and RMDQ present valid internal structure with 1 domain (disability). The QBPDS has a valid internal structure with 4 domains (rest, prolonged postures, ambulation/reach, and bending/carrying). The BQ does not have a well-defined internal structure.
结构效度是指问卷或量表的得分在多大程度上反映了要测量的结构。本研究的目的是对罗尔芒-莫里斯残疾问卷（RMDQ）、奥斯威斯特里残疾指数（ODI）、魁北克腰痛残疾量表（QBPDS）和伯恩茅斯问卷（BQ）在巴西慢性下背痛患者中的结构效度进行分析。
进行了一项横断面研究。样本由非特异性慢性下背痛患者组成（11 点数字疼痛评分量表得分≥3 分）。采用验证性因子分析对 RMDQ、ODI、QBPDS 和 BQ 的巴西版本的内部结构（域和项目数）进行分析。
共纳入 222 例患者。样本主要由女性和超重者组成。RMDQ 和 ODI 具有一维结构，所有验证性因子分析拟合指数的数值均为可接受。具有 4 个域和 20 个项目的 QBPDS 显示出最佳的拟合指数值。此外，我们没有通过验证性因子分析确定 BQ 的支持的内部结构。
ODI 和 RMDQ 具有 1 个域（残疾）的有效内部结构。QBPDS 具有 4 个域（休息、长时间姿势、行走/伸手、弯曲/携带）的有效内部结构。BQ 没有明确的内部结构。
