{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T05:56:42Z","timestamp":1770530202233,"version":"3.49.0"},"reference-count":23,"publisher":"S. Karger AG","issue":"2","license":[{"start":{"date-parts":[[2008,1,1]],"date-time":"2008-01-01T00:00:00Z","timestamp":1199145600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2008,1,1]],"date-time":"2008-01-01T00:00:00Z","timestamp":1199145600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neuroepidemiology"],"published-print":{"date-parts":[[2008]]},"abstract":"<jats:p>&lt;i&gt;Background:&lt;\/i&gt; Prevalence data on primary chronic headache in the general population based on clinical interviews by physicians are lacking. &lt;i&gt;Methods:&lt;\/i&gt; In a cross-sectional epidemiological survey, a random sample of 30,000 persons from Akershus County, aged 30\u201344 years, were sent a postal questionnaire. Those with self-reported chronic headache within the last month and\/or year were invited to a semi-structured diagnostic interview and a physical and neurological examination conducted by 2 neurological residents with experience in headache diagnostics. The diagnoses were made according to the International Classification of Headache Disorders, 2nd edition, 2004, and relevant revisions. &lt;i&gt;Results:&lt;\/i&gt; The questionnaire response rate was 71%, and the participation rate of the interview was 74%. The 1-year prevalence of primary chronic headache was 2.9%. Chronic tension-type headache (CTTH) and probable chronic tension-type headache (pCTTH) had 1-year prevalences of 1.6 and 1.2%, respectively. The prevalences of other primary chronic headaches were: chronic migraine (CM) 0.01%, probable CM 0.09% and other subtypes 0.04%. Co-occurrence of migraine was frequent, as 42% with CTTH and 55% with pCTTH had migraine. &lt;i&gt;Conclusion:&lt;\/i&gt; Primary chronic headache is prevalent in the general population. The majority has CTTH or pCTTH, while CM and other primary chronic headaches are rare.<\/jats:p>","DOI":"10.1159\/000116244","type":"journal-article","created":{"date-parts":[[2008,2,15]],"date-time":"2008-02-15T15:20:14Z","timestamp":1203088814000},"page":"76-83","source":"Crossref","is-referenced-by-count":68,"title":["Prevalence of Primary Chronic Headache in a Population-Based Sample of 30- to 44-Year-Old Persons"],"prefix":"10.1159","volume":"30","author":[{"given":"Ragnhild Berling","family":"Grande","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kjersti","family":"Aaseth","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P\u00e5l","family":"Gulbrandsen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christofer","family":"Lundqvist","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael Bj\u00f8rn","family":"Russell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2008,2,14]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2006.01190.x"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1526-4610.1999.3903190.x"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2005.00878.x"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2006.01117.x"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2006.01172.x"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1468-2982.2000.00145.x"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1468-2982.1994.1402097.x"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1007%2Fs10194-005-0253-3"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2006.01210.x"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1212%2F01.wnl.0000183555.54305.fd"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1016%2F0895-4356%2891%2990147-2"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1468-2982.2001.00294.x"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1468-2982.2004.00680.x"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1526-4610.1991.hed3105290.x"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1093%2Fije%2F24.3.612"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1007%2Fs10654-005-6031-3"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1007%2Fs10194-006-0276-4"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1468-2982.1998.1808552.x"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1526-4610.1998.3807497.x"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1016%2Fs0304-3959%2802%2900348-2"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1046%2Fj.1468-2982.2000.00049.x"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1600-0404.2007.00849.x"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1111%2Fj.1526-4610.1994.hed3401001.x"}],"container-title":["Neuroepidemiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/116244","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/116244","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,24]],"date-time":"2025-04-24T02:18:23Z","timestamp":1745461103000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000116244"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008]]},"references-count":23,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2008,4,1]]}},"URL":"https:\/\/doi.org\/10.1159\/000116244","archive":["Portico"],"relation":{},"ISSN":["0251-5350","1423-0208"],"issn-type":[{"value":"0251-5350","type":"print"},{"value":"1423-0208","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008]]}}}