Measurement Characteristics and Clinical Utility of the 12-Item Multiple Sclerosis Walking Scale

      Mobility impairments are among the most common symptoms reported by individuals with multiple sclerosis (MS),1 with prevalence rates ranging from about 50% to >90%.2 Fewer than 50% of people with MS walk unaided.3 Gait abnormalities are found in individuals with early MS4 and those minimally affected by the disease5; yet, people with MS can remain ambulatory for 10 to 20 years and more.6 Those with more disability (Expanded Disability Status Scale scores 3–5) are at moderate risk of developing gait limitations in 10 years, with half requiring an assistive device.6 Thus, measuring mobility is a common component of the examination of patients with MS. The 12-Item MS Walking Scale7 (MSWS-12) is a self-report measure of the impact of MS on walking ability. Two versions exist; this summary pertains to the original version. The MSWS-12 can be administered in less than 10 minutes; each item is rated on a 1–5 point scale (1 = no limitation and 5 = extreme limitation) and the score is transformed to a 0–100 point scale. Data support its reliability, validity, and responsiveness.
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