RLS in middle aged women and attention deficit/hyperactivity disorder in their offspring

Department of Nutrition, Harvard University School of Public Health, Boston, MA 02115, USA.
Sleep Medicine (Impact Factor: 3.1). 01/2011; 12(1):89-91. DOI: 10.1016/j.sleep.2010.05.006
Source: PubMed

ABSTRACT Previous studies have suggested that attention deficit/hyperactivity disorder (ADHD) and restless legs syndrome (RLS) could share some common genetic backgrounds, but the effect of these genetic components could be modest. To test this hypothesis, we conducted a large-scaled cross-sectional study to examine whether women with a child with ADHD had a higher risk of having RLS than women of unaffected children.
We included 65,554 women free of diabetes, arthritis, and pregnancy in the current analyses. Information on RLS was assessed using a set of standardized questions. Participants were considered to have RLS if they met four RLS diagnostic criteria recommended by the International RLS Study Group and had restless legs ≥5 times/month. Information on ADHD in offspring was collected via questionnaire.
We observed a significant association between presence of ADHD in the offspring and risk of having RLS; the multivariate-adjusted OR for RLS was 1.27 (95% CI: 1.15, 1.41; P<0.0001), after adjusting for age, body mass index, number of deliveries during life time and other covariates.
We found that mothers of children with ADHD had an increased risk of having RLS. Further studies are warranted to explore biological mechanisms underling this association.

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