{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T20:44:04Z","timestamp":1793047444075,"version":"4.5.0"},"reference-count":61,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2024,9,13]],"date-time":"2024-09-13T00:00:00Z","timestamp":1726185600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["headachejournal.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Headache"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This study aimed to evaluate the association between rheumatoid arthritis (RA) and subsequent migraine risk using the Korean National Health Insurance Service database.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Migraine may be related to immune dysfunction and previous studies have suggested an association with chronic inflammatory rheumatic diseases; however, the relationship between RA and migraine remains unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This was a population\u2010based, nationwide, retrospective, longitudinal cohort study. Participants were enrolled from 2010 to 2017 and followed up until 2019. A total of 42,674 patients who had undergone a health checkup within 2\u2009years prior to the initial diagnosis of RA were included in the study, after applying the exclusion criteria (previous migraine, other rheumatic disease, missing variables of interest). A non\u2010RA control was obtained by age and sex\u2010matching (1:5). Finally, 42,644 patients with RA were enrolled, with 213,370 individuals without RA included as controls. Among the patients with RA, 29,744 had seropositive RA (SPRA), and 12,900 had seronegative RA (SNRA). SPRA was defined by the International Classification of Diseases 10th revision (ICD\u201010) code M05, prescription of disease\u2010modifying anti\u2010rheumatic drugs (DMARDs), and enrollment in a special copayment reduction program. SNRA was defined by the ICD\u201010 code M06 and prescription of any DMARD. The primary endpoint was the occurrence of migraine incidents, defined using the ICD\u201010 code of migraine (G43).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 22,294 migraine cases (17,912\/213,370 [8.3%] in controls and 4382\/42,674 [10.2%] in RA) were reported during a mean follow\u2010up of 4.4\u2009years after a 1\u2010year lag period. Patients with RA had a 1.2\u2010fold higher risk of migraine compared with controls (adjusted hazard ratio [aHR] 1.21, 95% confidence interval [CI] 1.17\u20131.26). Increased risk of migraine was found in both patients with SNRA and SPRA compared with controls (aHR 1.20, CI 1.15\u20131.24 in SPRA; aHR 1.26, CI 1.19\u20131.34 in SNRA). Compared to patients with SNRA, those with SPRA did not demonstrate a heightened risk (aHR 0.94, CI 0.88\u20131.01). A significant interaction was confirmed between covariates (male, current smoker, those with diabetes mellitus, and dyslipidemia) and the risk of migraine (\n                      <jats:italic>p<\/jats:italic>\n                      for interaction of &lt;0.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>RA was linked to a higher migraine risk, regardless of seropositivity.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/head.14832","type":"journal-article","created":{"date-parts":[[2024,9,13]],"date-time":"2024-09-13T10:16:28Z","timestamp":1726222588000},"page":"326-337","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Heightened migraine risk in patients with rheumatoid arthritis: A national retrospective cohort study"],"prefix":"10.1111","volume":"65","author":[{"given":"Seonyoung","family":"Kang","sequence":"first","affiliation":[{"name":"Department of Internal Medicine, Samsung Medical Center Sungkyunkwan University School of Medicine  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yeonghee","family":"Eun","sequence":"additional","affiliation":[{"name":"Division of Rheumatology, Department of Internal Medicine, Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyungdo","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Statistics and Actuarial Science Soongsil University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinhyung","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Medical Statistics, College of Medicine Catholic University of Korea  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