TY - JOUR
T1 - Does idiopathic restless legs syndrome delay onset and reduce severity of Parkinson's disease
T2 - A pilot study
AU - Dragan, Elizabeth M.
AU - Chen, Zhongxue
AU - Ondo, William G.
PY - 2015/7/3
Y1 - 2015/7/3
N2 - Parkinson's disease (PD) populations show that about 20% of patients meet criteria for restless legs syndrome (RLS). Nevertheless, pathological differences suggest RLS may actually prevent PD. Over 15 years, we collected patients with idiopathic RLS preceding onset of PD, as defined by onset of RLS greater than 5 years before motor symptoms of PD, or a family history of RLS and onset of RLS at least 1 year before PD. We then compared these to a control group of PD without RLS for demographics, age of onset, motor progression, dyskinesia, L-dopa equivalent dose, and PD phenotype at onset. The RLS/PD group (N = 36) had 13 females with 18 having a positive family history of RLS and six with a family history of PD. The PD control group (N = 36) had 10 females with 1 having a family history of RLS and nine with family history of PD. Age at motor onset of PD in the RLS/PD was older (64.15 ± 6.44 years vs. 56.81 ± 10.68) than for controls with PD (p <0.001). After correcting for other risk factors and duration of follow-up, patients with idiopathic PD (21/36) developed dyskinesia more than RLS/PD (4/32) at final visit (p = 0.01). Our data suggest that idiopathic RLS may delay the onset of PD, reduce dyskinesia occurrence, and possibly reduce progression of PD.
AB - Parkinson's disease (PD) populations show that about 20% of patients meet criteria for restless legs syndrome (RLS). Nevertheless, pathological differences suggest RLS may actually prevent PD. Over 15 years, we collected patients with idiopathic RLS preceding onset of PD, as defined by onset of RLS greater than 5 years before motor symptoms of PD, or a family history of RLS and onset of RLS at least 1 year before PD. We then compared these to a control group of PD without RLS for demographics, age of onset, motor progression, dyskinesia, L-dopa equivalent dose, and PD phenotype at onset. The RLS/PD group (N = 36) had 13 females with 18 having a positive family history of RLS and six with a family history of PD. The PD control group (N = 36) had 10 females with 1 having a family history of RLS and nine with family history of PD. Age at motor onset of PD in the RLS/PD was older (64.15 ± 6.44 years vs. 56.81 ± 10.68) than for controls with PD (p <0.001). After correcting for other risk factors and duration of follow-up, patients with idiopathic PD (21/36) developed dyskinesia more than RLS/PD (4/32) at final visit (p = 0.01). Our data suggest that idiopathic RLS may delay the onset of PD, reduce dyskinesia occurrence, and possibly reduce progression of PD.
KW - iron
KW - neurodegeneration
KW - Parkinson's disease
KW - prognosis
KW - Restless legs syndrome
KW - Willis Ekbom disease
UR - http://www.scopus.com/inward/record.url?scp=84938680957&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938680957&partnerID=8YFLogxK
U2 - 10.3109/00207454.2014.987771
DO - 10.3109/00207454.2014.987771
M3 - Article
C2 - 25405536
AN - SCOPUS:84938680957
VL - 125
SP - 526
EP - 530
JO - International Journal of Neuroscience
JF - International Journal of Neuroscience
SN - 0020-7454
IS - 7
ER -