Risk of Parkinson's disease in multiple sclerosis and neuromyelitis optica spectrum disorder: a nationwide cohort study in South Korea
- Kwon, Soonwook; Jung, Se Young; Han, Kyung-do; Jung, Jin Hyung; Yeo, Yohwan; Cho, Eun Bin; Ahn, Jong Hyeon; Shin, Dong Wook; Min, Ju-Hong
- Issue Date
- BMJ PUBLISHING GROUP
- MULTIPLE SCLEROSIS; PARKINSON' S DISEASE; EPIDEMIOLOGY
- JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY, v.93, no.11, pp.1209 - 1215
- Journal Title
- JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY
- Start Page
- End Page
- Background Neurodegeneration is associated with pathogenesis of both multiple sclerosis (MS) and neuromyelitis optica (NMOSD). Parkinson's disease (PD) is a representative neurodegenerative disease, however, whether MS or NMOSD is associated with risk of PD is not known. Methods MS and NMOSD cohorts were collected from the Korean National Health Insurance Service between 1 January 2010 and 31 December 2017, using International Classification of Diseases 10th revision diagnosis codes and information in the Rare Intractable Disease management programme. The PD incidence rate that occurred after a 1-year lag period was calculated and compared with that of a control cohort matched for age, sex, hypertension, diabetes and dyslipidaemia in a 1:5 ratio. Results The incidence rates of PD in patients with MS and NMOSD were 3.38 and 1.27 per 1000 person-years, respectively, and were higher than that of their matched control groups. The adjusted HR of PD was 7.73 (95% CI, 3.87 to 15.47) in patients with MS and 2.61 (95% CI, 1.13 to 6.02) in patients with NMOSD compared with matched controls. In both patients with MS and NMOSD, there were no significant differences in relative risk when stratified by sex, age, diabetes, hypertension and dyslipidaemia. Conclusion The PD risk was higher in patients with MS and NMOSD compared with healthy controls and was particularly high in patients with MS. Further investigations should be performed to determine the pathophysiology and occurrence of PD in patients with MS and NMOSD.
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