msard-journal.com/article/S...
A study from Saudi Arabia shows that RLS affects around 30% of the MS patients in the Study. This reflects other studies on MS.
I've asked whether the study participants were taking any medication for their RLS, as that would affect the results.
As usual, the cause of the RLS isn't clear. The study suggests it may be caused by low brain iron, inflammation or spinal cord scarring.
Those on higher efficacy MS drugs (Ocrevus & Fingomolid) seem to have worse RLS than those on the older, less effective MS drugs(Interferons, Aubagio) which is the opposite of what I would expect.