{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T00:07:02Z","timestamp":1759882022412,"version":"build-2065373602"},"reference-count":24,"publisher":"Cambridge University Press (CUP)","issue":"6","license":[{"start":{"date-parts":[[2025,3,3]],"date-time":"2025-03-03T00:00:00Z","timestamp":1740960000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Can. J. Neurol. Sci."],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec id=\"S0317167125000393_as1\"><jats:title>Background:<\/jats:title><jats:p>Chronic headache after aneurysmal subarachnoid hemorrhage (aSAH) remains an ongoing area of investigation, with uncertainty regarding its prevalence and long-term outcomes.<\/jats:p><\/jats:sec><jats:sec id=\"S0317167125000393_as2\"><jats:title>Methods:<\/jats:title><jats:p>A systematic review was conducted across five databases \u2013 Medline (Ovid), the Cochrane Central Register of Controlled Trials (Ovid), PsychInfo (Ovid), Embase (Ovid) and Scopus (Elsevier) \u2013 to identify all studies investigating the prevalence of chronic headaches after aSAH. A total of five studies were identified and included in our review.<\/jats:p><\/jats:sec><jats:sec id=\"S0317167125000393_as3\"><jats:title>Results:<\/jats:title><jats:p>There were five observational studies (three cohort and two cross-sectional). The overall prevalence of chronic headaches after aSAH ranged from 16.1% to 41%, albeit across a follow-up time frame of 12 months to 7.5 years. Outcome measurements included quantitative pain scores and opioid usage; however, these were inconsistent across studies, and the studies did not address the long-term impacts of chronic headaches on quality of life or their psychosocial implications.<\/jats:p><\/jats:sec><jats:sec id=\"S0317167125000393_as4\"><jats:title>Conclusion:<\/jats:title><jats:p>The prevalence of chronic headache after aSAH is not well-characterized, and long-term outcomes are seldom studied, highlighting a critical gap in the current literature. Longitudinal cohort studies with standardized approaches to ascertain the psychosocial and physiological burden associated with post-aSAH chronic headaches are urgently needed.<\/jats:p><\/jats:sec>","DOI":"10.1017\/cjn.2025.39","type":"journal-article","created":{"date-parts":[[2025,3,3]],"date-time":"2025-03-03T04:14:59Z","timestamp":1740975299000},"page":"999-1005","source":"Crossref","is-referenced-by-count":1,"title":["The Prevalence and Long-Term Outcomes of Headaches after Aneurysmal Subarachnoid Hemorrhage: A Systematic Review"],"prefix":"10.1017","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3902-665X","authenticated-orcid":false,"given":"Youngkyung","family":"Jung","sequence":"first","affiliation":[{"name":"University of Toronto"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nat\u00e1lia","family":"Vasconcellos de Oliveira Souza","sequence":"additional","affiliation":[{"name":"University of 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