How common is restless leg syndrome?

B/n 3.9-5.5%: Here is a link on a study done on rls: http://www.Ncbi.Nlm.Nih.Gov/pubmed/12127170 rls is more common in women than men (hence the range). The stanford study found that alcohol and/or smoking use, as with night-shift working, increases risk of rls. They also said that with increased age RLS risk increases, and that sleep apnea and coffee consumption also contributed. They said more data was needed.