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The aim is to enhance our understanding of central nervous system (CNS) demyelinating diseases. Additionally, the establishment of this cohort will address the critical issue of the lack of comprehensive genetic data and biological samples for precision diagnosis and treatment research related to neuroimmunological diseases in China.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants<\/jats:title>\n                    <jats:p>56 hospitals in various regions of China were selected to participate in this study. The patients diagnosed with CNS demyelinating diseases were recruited, including clinically isolated syndrome (CIS), multiple sclerosis (MS), neuromyelitis optica spectrum disease (NMOSD), myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) and autoimmune glial fibrillary acidic protein astrocytopathy (GFAP-A).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Finding to date<\/jats:title>\n                    <jats:p>At the time of patient enrolment, the clinical information is designated as baseline data. The collected baseline data include demographic information, disease history, clinical features of each demyelinating event, treatment records, standardised scales, questionnaire assessments and laboratory test results. Furthermore, biological samples, MRI and high-density electroencephalography (hd-EEG) data will be collected at baseline. All patients will be followed up at 3 months and 6 months and annually thereafter. As of December 2024, 3866 patients with CNS demyelinating diseases have been enrolled, including 84 CIS, 282 MOGAD, 1405 MS and 2095 NMOSD. Our findings indicate that CNS demyelinating diseases, particularly NMOSD, are more prevalent in women in China, with significant age differences observed among NMOSD patients compared with those with CIS, MS and MOGAD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Future plans<\/jats:title>\n                    <jats:p>In future, all patients in our cohort will be followed up at 3 months and 6 months and then annually. By the end of December 2024, the database has been locked and is now being processed and analysed, while our data continue to be updated and expanded for further analysis. Both prospective and retrospective observations will be included in this study. Subsequent publications will emerge from this multicentre cohort, encompassing genomics, clinical cohort studies, hd-EEG biomarkers, imaging-based radiomics and electrical stimulation therapies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trail registration number<\/jats:title>\n                    <jats:p>\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT06443333\">NCT06443333<\/jats:ext-link>\n                      .\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmjopen-2025-099386","type":"journal-article","created":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T13:40:20Z","timestamp":1767879620000},"page":"e099386","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Chinese neuroimmunological disease (NIDBase) cohort study: cohort 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