Nakhostin Ansari Noureddin, Naghdi Soofia, Mohammadi Roghaye, Hasson Scott
Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Gait Posture. 2015 Feb;41(2):420-4. doi: 10.1016/j.gaitpost.2014.11.003. Epub 2014 Nov 20.
The Multiple Sclerosis Walking Scale-12 (MSWS-12) is a multi-item rating scale used to assess the perspectives of patients about the impact of MS on their walking ability. The aim of this study was to examine the reliability and validity of the MSWS-12 in Persian speaking patients with MS. The MSWS-12 questionnaire was translated into Persian language according to internationally adopted standards involving forward-backward translation, reviewed by an expert committee and tested on the pre-final version. In this cross-sectional study, 100 participants (50 patients with MS and 50 healthy subjects) were included. The MSWS-12 was administered twice 7 days apart to 30 patients with MS for test and retest reliability. Internal consistency reliability was Cronbach's α 0.96 for test and 0.97 for retest. There were no significant floor or ceiling effects. Test-retest reliability was excellent (intraclass correlation coefficient [ICC] agreement of 0.98, 95% CI, 0.95-0.99) confirming the reproducibility of the Persian MSWS-12. Construct validity using known group methods was demonstrated through a significant difference in the Persian MSWS-12 total score between the patients with MS and healthy subjects. Factor analysis extracted 2 latent factors (79.24% of the total variance). A second factor analysis suggested the 9-item Persian MSWS as a unidimensional scale for patients with MS. The Persian MSWS-12 was found to be valid and reliable for assessing walking ability in Persian speaking patients with MS.
多发性硬化步行量表-12（MSWS-12）是一种多项目评定量表，用于评估患者对多发性硬化对其步行能力影响的看法。本研究的目的是检验MSWS-12在说波斯语的多发性硬化患者中的信度和效度。MSWS-12问卷根据国际通用标准翻译成波斯语，包括正反翻译，经专家委员会审核并在预终版上进行测试。在这项横断面研究中，纳入了100名参与者（50例多发性硬化患者和50名健康受试者）。对30例多发性硬化患者进行了两次MSWS-12评定，间隔7天，以检验重测信度。内部一致性信度方面，测试时Cronbach's α为0.96，重测时为0.97。不存在显著的地板效应或天花板效应。重测信度极佳（组内相关系数[ICC]一致性为0.98，95%CI，0.95 - 0.99），证实了波斯语MSWS-12的可重复性。通过多发性硬化患者与健康受试者之间波斯语MSWS-12总分的显著差异，使用已知组方法证明了结构效度。因子分析提取了2个潜在因子（占总方差的79.24%）。第二次因子分析表明，9项波斯语MSWS对多发性硬化患者是一个单维量表。结果发现，波斯语MSWS-12在评估说波斯语的多发性硬化患者的步行能力方面是有效且可靠的。
