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Weimers, Petra; Halfvarson, Jonas; Sachs, Michael C; Saunders-Pullman, Rachel; Ludvigsson, Jonas F; Peter, Inga; Burisch, Johan; Olén, Ola
Inflammatory bowel diseases, 01/2019, Volume: 25, Issue: 1Journal Article
Abstract Background Few studies have examined the association between inflammatory bowel disease (IBD) and Parkinson's disease (PD). Methods To estimate the incidence and relative risk of PD development in a cohort of adult IBD, we included all incident IBD patients (n = 39,652) in the Swedish National Patient Register (NPR) between 2002 and 2014 (ulcerative colitis UC: n = 24,422; Crohn's disease CD: n = 11,418; IBD-unclassified IBD-U: n = 3812). Each IBD patient was matched for sex, age, year, and place of residence with up to 10 reference individuals (n = 396,520). In a cohort design, all incident PD occurring after the index date was included from the NPR. In a case-control design, all incident PD occurring before the index date was included. The association between IBD and PD and vice versa was investigated by multivariable Cox and logistic regression. Results In IBD, there were 103 cases of incident PD, resulting in hazard ratios (HRs) for PD of 1.3 (95% confidence interval CI, 1.0-1.7; P = 0.04) in UC, 1.1 (95% CI, 0.7-1.7) in CD, and 1.7 (95% CI, 0.8-3.0) in IBD-U. However, these effects disappeared when adjusting for number of medical visits during follow-up to minimize potential surveillance bias. In a case-control analysis, IBD patients were more likely to have prevalent PD at the time of IBD diagnosis than matched controls, with odds ratios of 1.4 (95% CI, 1.2-1.8) in all IBD patients, 1.4 (95% CI, 1.1-1.9) for UC, and 1.6 (95% CI, 1.1-2.3) for CD patients alone. Conclusions IBD is associated with an increased risk of PD, but some of this association might be explained by surveillance bias. 10.1093/ibd/izy190_video1 izy190.video1 5785623138001
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