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This study aimed to analyze the evolution in self-reported headache disorder (SRHD) in Spain from 2006 to 2023, focusing on its relationship with demographic factors (sex, age, and social class) and the potential impact of the COVID-19 pandemic.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A repeated cross-sectional study using seven national health surveys in Spain (2006\u20132023; 37,429\u2009\u2212\u200941,929 participants) analyzed SRHD adjusted by sex, age, social class, and education. Trends were tested with the Mann\u2013Kendall method.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      SRHD prevalence declined from 14.5% in 2006 to 10.8% in 2023, showing a negative, non-significant trend (total \u03c4 = \u2212\u20090.62,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.07; physician-diagnosed \u03c4 = \u2212\u20090.33,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.38). The reduction was more evident among women, older adults, and individuals from lower socioeconomic groups. Prevalence was approximately 2.5-fold higher in women, peaked between 25 and 54 years, was lowest in the youngest (15\u201324) and oldest (&gt;\u200975) groups, and decreased with higher social class and education. The 2020 data point, collected during the COVID-19 pandemic, deviated from the trend but was not a statistical outlier, and its exclusion reduced the magnitude of the downward slope without altering its non-significant nature.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>SRHD prevalence showed a non-significant decline over the past 17 years in Spain. The reduction was more evident among women, older adults, and lower socioeconomic groups, indicating that demographic and social determinants may shape these temporal dynamics.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12889-026-26744-3","type":"journal-article","created":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T10:35:29Z","timestamp":1772188529000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["\u200b\u200bTrends in self-reported headache disorder in Spain between 2006 and 2023: the role of sociodemographic factors"],"prefix":"10.1186","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2842-0085","authenticated-orcid":false,"given":"Miguel \u00c1.","family":"Huerta","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6465-982X","authenticated-orcid":false,"given":"Jose A.","family":"Moral-Munoz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0192-5430","authenticated-orcid":false,"given":"Masahito","family":"Katsuki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5852-0146","authenticated-orcid":false,"given":"Yasuhiko","family":"Matsumori","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9567-462X","authenticated-orcid":false,"given":"Alejandro","family":"Salazar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,2,27]]},"reference":[{"key":"26744_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1186\/S10194-019-0993-0\/FIGURES\/2","volume":"20","author":"M Leonardi","year":"2019","unstructured":"Leonardi M, Raggi A. 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In accordance with Regulation (EU) 2016\/679 of the European Parliament and of the Council of 27 April 2016 (General Data Protection Regulation) and Organic Law 3\/2018 (Ley Org\u00e1nica de Protecci\u00f3n de Datos Personales y Garant\u00eda de los Derechos Digitales - LOPDGDD), the principles of data protection do not apply to anonymous information, even when used for statistical or research purposes. Therefore, the use of these data does not require the approval of an accredited ethics committee. Nonetheless, all standard ethical considerations were observed. The INE ensured that participants provided informed consent prior to their involvement in the original survey.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"1104"}}