Tomkins Christy C, Battié Michele C, Hu Richard
Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada.
Spine (Phila Pa 1976). 2007 Aug 1;32(17):1896-901. doi: 10.1097/BRS.0b013e31811328eb.
Measurement (validity) study using data from a prospective longitudinal study of lumbar spinal stenosis.
Provide convergent and divergent validity evidence for the use of the Physical Function Scale of the Swiss Spinal Stenosis Questionnaire for the measurement of walking capacity in persons with lumbar spinal stenosis. We were also interested in the association between the Physical Function Scale and the Oswestry Disability Index (ODI).
The Physical Function Scale has been used to assess walking capacity in persons with lumbar spinal stenosis; however, there have been limited studies investigating its psychometric properties. No validity studies have compared the Physical Function Scale and the ODI head to head.
The Physical Function Scale was correlated with the ODI, Health Utilities Index, Centres for Epidemiologic Studies Depression Scale, Medical Outcomes Survey Social Support Scale, and an additional item from the Oxford Claudication Score.
As hypothesized, the Physical Function Scale was correlated highly with those instruments and items intended to measure walking capacity and minimally with those instruments intended to measure different constructs. The correlation between the Physical Function Scale and the ODI was r = 0.719.
Results support construct validity of the Physical Function Scale for the measurement of walking in an lumbar spinal stenosis population. However, it cannot be ascertained from the current study that the construct being measured is, indeed, walking capacity. Further research is warranted to investigate criterion validity evidence for the use of the Physical Function Scale in the measurement of walking capacity in lumbar spinal stenosis, by examining the relationships between self-report and observational measures of walking.
使用腰椎管狭窄症前瞻性纵向研究的数据进行测量（效度）研究。
为瑞士腰椎管狭窄症问卷的身体功能量表用于测量腰椎管狭窄症患者的步行能力提供聚合效度和区分效度证据。我们还对身体功能量表与奥斯维斯特功能障碍指数（ODI）之间的关联感兴趣。
身体功能量表已被用于评估腰椎管狭窄症患者的步行能力；然而，对其心理测量特性进行调查的研究有限。尚无效度研究对身体功能量表和ODI进行直接比较。
将身体功能量表与ODI、健康效用指数、流行病学研究中心抑郁量表、医疗结果调查社会支持量表以及牛津间歇性跛行评分中的一个额外项目进行相关性分析。
正如所假设的，身体功能量表与旨在测量步行能力的那些工具和项目高度相关，而与旨在测量不同结构的那些工具的相关性最小。身体功能量表与ODI之间的相关性为r = 0.719。
结果支持身体功能量表在测量腰椎管狭窄症人群步行能力方面的结构效度。然而，从当前研究无法确定所测量的结构确实是步行能力。有必要进行进一步研究，通过检查自我报告的步行与观察到的步行之间的关系，来调查身体功能量表在测量腰椎管狭窄症步行能力方面的效标效度证据。
