Razmjou Helen, Denis Suzanne, Robarts Susan, Wainwright Amy, Dickson Patricia, Roszkowski Ania, Murnaghan John
Department of Rehabilitation, Holland Orthopaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Canada.
Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Canada.
BMC Musculoskelet Disord. 2025 Jan 8;26(1):30. doi: 10.1186/s12891-025-08282-y.
The purposes of this study were to examine the reliability and factorial and convergent validity of a virtual performance measure (VPM) in patients with osteoarthritis (OA) of the hip joint and to compare the known-group validity of the VPM with traditional self-report and performance-based outcomes.
The VPM score was based on the results of 10 videos showing increasing difficulty in performing specific functional tasks. Patients were requested to choose the video that best reflected their own level of function. Clinical presentation and radiological findings were documented. Self-report measures were the lower extremity functional score (LEFS) and pain scale. The performance-based measures were the 30- second Chair Stand Test (CST) and the 40-meter fast paced walk test (40 m FPWT) test.
Data of 100 patients, 64 (64%) females, mean age: 67 ±10 were examined. The Cronbach's alpha coefficient that examined internal consistency of the VPM total score was 0.88. Factor analysis showed two distinct domains. Moderate correlations were observed between the VPM total score and the LEFS, pain score, and 40 m FPWT (r > 0.50). The VPM and the LEFS were able to differentiate between candidates and non-candidates for hip arthroplasty and between those with and without assistive walking devices. There was no statistically significant difference between the overall accuracy of the VPM and LEFS in the area under the curve value (0.72 vs. 0.71) with respect to candidacy for surgery.
This study provides substantial evidence towards the validity and reliability of the VPM outcome measure in patients with moderate to severe OA of the hip joint. Digitally based outcome measures have the potential of enhancing remote measurement of functional difficulties in specific situations.
Not applicable.
本研究旨在检验髋关节骨关节炎（OA）患者虚拟表现测量（VPM）的可靠性、因子效度和收敛效度，并将VPM的已知组效度与传统的自我报告和基于表现的结果进行比较。
VPM评分基于10个视频的结果，这些视频展示了执行特定功能任务的难度逐渐增加。要求患者选择最能反映其自身功能水平的视频。记录临床表现和放射学检查结果。自我报告测量指标为下肢功能评分（LEFS）和疼痛量表。基于表现的测量指标为30秒坐立试验（CST）和40米快步行走试验（40m FPWT）。
对100例患者的数据进行了分析，其中64例（64%）为女性，平均年龄为67±10岁。检验VPM总分内部一致性的Cronbach's α系数为0.88。因子分析显示两个不同的领域。VPM总分与LEFS、疼痛评分和40m FPWT之间存在中度相关性（r>0.50）。VPM和LEFS能够区分髋关节置换术的候选者和非候选者，以及使用和未使用辅助步行设备的患者。在手术候选资格方面，VPM和LEFS在曲线下面积值的总体准确性上没有统计学显著差异（0.72对0.71）。
本研究为VPM结果测量在中度至重度髋关节OA患者中的效度和可靠性提供了大量证据。基于数字的结果测量有可能在特定情况下加强对功能困难的远程测量。
不适用。
