Association between Inflammatory Bowel Disease and Subsequent Development of Restless Legs Syndrome and Parkinson's Disease: A Retrospective Cohort Study of 35,988 Primary Care Patients in Germany.

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BackgroundIn addition to the gastrointestinal symptoms, inflammatory bowel disease (IBD), which includes Crohn's disease (CD) and ulcerative colitis (UC), is associated with extraintestinal manifestations, including neurological disorders, which are gaining increasing attention due to a recently increased focus on the gut-brain axis. Here we aim to evaluate the association between IBD and restless legs syndrome (RLS) as well as Parkinson's disease (PD) in a cohort of primary care patients in Germany.MethodsThe study included 17,994 individuals with a diagnosis of IBD (7544 with CD and 10,450 with UC) and 17,994 propensity-score-matched individuals without IBD from the Disease Analyzer database (IQVIA). An initial diagnosis of RLS or PD was assessed as a function of IBD. Associations between CD and UC with RLS and PD were analyzed using Cox regression models.ResultsDuring the 10-year observation period, 3.6% of CD patients vs. 1.9% of matched non-IBD pairs (p p p = 0.064).ConclusionsThe present analysis suggests a significant association between IBD and the subsequent development of RLS. These findings should stimulate further pathophysiological research and may eventually lead to specific screening measures in patients with IBD.

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