Found here
STOCKHOLM—Restless legs syndrome (RLS) is a common affliction among patients with stage III-IV CKD, an Italian study found.
The estimated prevalence of RLS in the general population and the hemodialysis population is 5%-15% and 12%-62%, the researchers noted. Little data are available regarding RLS prevalence in patients with CKD stages III-IV.
Found here:
Restless Legs Syndrome, or RLS, is a condition mainly described as an irresistible urge to move the body, or a part of the body, to stop uncomfortable or odd sensations. The legs are what is mostly affected, hence the name. But the arms and torso can also be affected. Victims of the Restless Legs Syndrome describe feeling either burning, tickling, or itching sensations in the muscles. They would then move the affected body part to relieve them of the uncomfortable feelings. RLS is also known as the Wittmaack-Eckbom’s Syndrome, and sometimes also called (inaccurately) as Nocturnal Myoclonus.