Prevalence of migraine in patients with restless legs syndrome: a case-control study.
OBJECTIVE
To assess and compare the prevalence of migraine in patients with restless legs syndrome (RLS) and matched controls.


BACKGROUND
Recent studies have suggested an association between migraine and RLS. Our work is the first case-control study on this subject performed in an RLS population.


METHODS
A case-control study was conducted in 47 RLS patients (27 women and 20 men aged between 18 and 65 years) and 47 age- and sex-matched controls. Validated questionnaires were used to investigate the presence of migraine, anxiety, and depression (Zung Self-Rating Anxiety and Depression scales), sleep quality (Pittsburgh Sleep Quality Index), and RLS severity (International RLS scale).


RESULTS
RLS patients had higher lifetime prevalence of migraine than non-RLS controls (53.2% vs. 25.5%, P = .005; matched-OR 1.3 [P = .019]; adjusted odds ratio (OR) 3.8 [P = .03]). No significant associations were found between RLS and active migraine with aura or inactive migraine (no episodes in the previous year). However, active migraine without aura was significantly more prevalent in patients with RLS than in controls (40.4% vs. 12.8%, P = .001; matched OR 1.5 [P = .001]; adjusted OR 2.7 [P = .04]). Within the RLS group, patients with migraine had poorer sleep quality than those without migraine (Pittsburgh Sleep Quality Index >5:100 vs. 80.9%, P = .038) but did not differ in terms of RLS severity, anxiety and depression, use of dopaminergic agonists, and body mass index.


CONCLUSIONS
There appears to be a relationship between RLS and migraine, in particular for active migraine without aura.
Headache Unit, Department of Neurology, Hospital Clínico San Carlos, Universidad Complutense, Madrid, Spain.
Marta
M
Fernández-Matarrubia
María L
ML
Cuadrado
Cristian M
CM
Sánchez-Barros
Francisco J
FJ
Martínez-Orozco
Cristina
C
Fernández-Pérez
Isabel
I
Villalibre
Belén
B
Ramírez-Nicolás
Jesús
J
Porta-Etessam
D000328:Adult; D016022:Case-Control Studies; D015897:Comorbidity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000453:epidemiology*; D015995:Prevalence; D012148:Restless Legs Syndrome / Q000453:epidemiology*
case-control study; migraine; restless legs syndrome; sleep quality