{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:44:46Z","timestamp":1760150686330,"version":"build-2065373602"},"reference-count":23,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T00:00:00Z","timestamp":1703203200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Background: Headache calendars are essential tools in monitoring changes in headache frequency and type. They are used in clinical practice for long-term monitoring, but their validation remains limited. The aim of this study was to validate the use of a digital calendar in monitoring single migraine and tension-type headache attacks. Methods: From July 2022 to February 2023, patients diagnosed with migraine and tension-type headache were enrolled. The validation of the digital calendar involved the comparison of self-reported single headache attacks in the digital calendar with the diagnostic headache diary based on the ICHD-3 criteria for migraine and tension-type headache. Sensitivity and specificity were calculated to assess reliability, and the level of agreement was calculated using kappa statistics. Results: This study included 30 patients (87% women) diagnosed with migraine and tension-type headache. The level of agreement in the classification of a single migraine attack revealed a sensitivity of 82% and a specificity of 78%, representing a substantial level of agreement (\u03ba = 0.60). The classification of a single tension-type headache attack revealed a sensitivity of 84% and a specificity of 72%, with a moderate level of agreement (\u03ba = 0.54). Conclusions: The digital calendar proves effective in monitoring single headache attacks in patients with migraine and tension-type headache. In clinical practice, we recommend using the digital calendar as a monitoring tool for headache patients, as they can accurately identify true migraine and tension-type headache days.<\/jats:p>","DOI":"10.3390\/diagnostics14010021","type":"journal-article","created":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T01:19:42Z","timestamp":1703207982000},"page":"21","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Validation of a Digital Headache Calendar at a Tertiary Referral Center"],"prefix":"10.3390","volume":"14","author":[{"given":"Amalie","family":"Kjerrumgaard","sequence":"first","affiliation":[{"name":"Danish Headache Center, Department of Neurology, Copenhagen University Hospital\u2014Rigshospitalet-Glostrup, 2600 Glostrup, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4342-6226","authenticated-orcid":false,"given":"Jeppe","family":"Hvedstrup","sequence":"additional","affiliation":[{"name":"Danish Headache Center, Department of Neurology, Copenhagen University Hospital\u2014Rigshospitalet-Glostrup, 2600 Glostrup, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3634-7287","authenticated-orcid":false,"given":"Louise Ninett","family":"Carlsen","sequence":"additional","affiliation":[{"name":"Danish Headache Center, Department of Neurology, Copenhagen University Hospital\u2014Rigshospitalet-Glostrup, 2600 Glostrup, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristine","family":"Dyre","sequence":"additional","affiliation":[{"name":"Center for IT and Medical Technology, Department Patient at Home, Team Prevention and Outpatient Treatment, The Capital Region of Denmark, 2100 Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henrik","family":"Schytz","sequence":"additional","affiliation":[{"name":"Danish Headache Center, Department of Neurology, Copenhagen University Hospital\u2014Rigshospitalet-Glostrup, 2600 Glostrup, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,12,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1186\/s10194-022-01402-2","article-title":"The global prevalence of headache: An update, with analysis of the influences of methodological factors on prevalence estimates","volume":"23","author":"Stovner","year":"2022","journal-title":"J. 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