Improved revisions of the Multiple Sclerosis Walking Scale

Takeaway

  • Some items, such as walking supports, on the Italian version of the Multiple Sclerosis Walking Scale (MSWS-12) have measurement flaws, and the proposed revisions to the scoring procedure improve the assessment’s fit to the Rasch model.

Why this matters

  • The MSWS-12 is used as an assessment of walking ability in multiple sclerosis (MS) and has been validated using Classical Test Theory; however, Item Response Theory (IRT) validity testing has shown that some items are not accurately reported.

  • Improving the validity and performance outcomes of these measurements may lead to an improvement in clinical diagnosis of MS.