MS Quiz Case 8

[PaigeGoodwin]

Hi I’m struggling with question #3 and wondering if you have a more concrete way of interpreting the 12-Item MS Walking Scale score and severity of walking impairment of minimal, moderate, severe, etc? (PS there is a typo on the reference slide with the total score for the measurement listed as 54 instead of 60 🙂 )

[Chrissy Durrough Lugge]

Hi Paige! This question is meant to test whether you know the minimum and maximum scores on the 12-Item MS Walking Scale and whether higher/lower scores are better worse.

There are two versions of the scale. Version 1 is out of 60 points and version 2 is out of 54 points (3 items were changed to a 1-3 from a 1-5 scale). These raw scores can be converted to a percentage from 0-100% by subtracting 12 (the minimum score) and dividing by 48 (version 1) or 42 (version 2). I’m updating this conversion in the reference slide today. 🙂

Version 2 is the more current version, so we will assume that is what was administered. This patient scored 34 out of 54 where higher scores indicate greater disability. This is pretty squarely in the middle of the scale, which makes it fairly simple to select moderate limitation when selecting between minimal, moderate, severe, or no limitation if we know the scale parameters.

Converting her score to a percentage: (34-12)/42 = 52.38%.

There are some clinically meaningful ranges available in the lecture handout. Her score falls in the range where we would expect cane use and difficulty performing IADLs.

[PaigeGoodwin]

Aww that makes so much more sense! Thank you!

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