The relationship between Willis-Ekbom disease and serum ferritin levels among children in Northwestern Turkey.

Objective: To examine the incidence of restless legs syndrome (RLS) among children with iron deficiency, or iron deficiency anemia, or both, and the relationship between RLS prevalence and serum ferritin levels.

Methods: This prospective, cross-sectional, case controlled study was carried out between January and June 2013, and included 98 iron deficiency and/or iron deficiency anemia, and 102 healthy children referred to the Neurology and Pediatric Departments of the Medical Faculty of Bezmialem Vakif University, Istanbul, Turkey. Both groups were evaluated according to the International Restless Legs Syndrome Study Group diagnostic criteria.