{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T01:19:14Z","timestamp":1791854354598,"version":"4.3.4"},"reference-count":24,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T00:00:00Z","timestamp":1755561600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003173","name":"Crafoordska Stiftelsen","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003173","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004359","name":"Vetenskapsr\u00e5det","doi-asserted-by":"publisher","award":["2018\u201002760"],"award-info":[{"award-number":["2018\u201002760"]}],"id":[{"id":"10.13039\/501100004359","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100016756","name":"Kempe Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100016756","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006189","name":"Albert P\u00e5hlsson Foundation","doi-asserted-by":"publisher","award":["20210036"],"award-info":[{"award-number":["20210036"]}],"id":[{"id":"10.13039\/501100006189","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Clinic Periodontology"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>Periodontitis proxy variables enable an expansion of periodontal research. The study aimed to estimate the validity of questionnaire items and registry data in relation to Stage III\u2013IV periodontitis and having 50% bone loss.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Malm\u00f6 Offspring Dental Study (MODS) participants (995) filled out questionnaires and underwent periodontal and panoramic radiography examinations. The questionnaire items, number of periodontal treatment procedures (PTP) in the Dental Health Register (DHR), and number of teeth with \u2265\u20096\u2009mm probing depth in the Swedish Quality Register for Caries and Periodontal Disease (SKaPa) were evaluated as proxies for severe periodontitis. Stage III\u2013IV periodontitis was the primary reference standard.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>For PTP\u2010based severe periodontitis proxy in DHR, positive predictive value (PPV) was 88% and negative predictive value (NPV) 87% for Stage III\u2013IV. The SKaPa\u2010based proxy showed poor positive predictive values (PPVs, &lt;\u200970%), but similar area under the curve (AUC), 0.74, compared with the DHR data (AUC 0.76). Sensitivity was &lt;\u200970%, and specificity &gt;\u200990% for the DHR and SKaPa proxies. Identification of cases with periodontitis by questionnaire combined with the demographic variables age, sex, smoking habits and education yielded good discriminatory ability (AUC &gt;\u20090.75).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Register\u2010based data can effectively identify individuals with severe periodontitis in large cohort studies, thereby advancing periodontal research.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jcpe.70015","type":"journal-article","created":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T09:53:19Z","timestamp":1755597199000},"page":"1529-1539","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Using Dental Register Information and Questionnaire Data to Assess Periodontitis in Large Cohort Studies"],"prefix":"10.1111","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-7573-3220","authenticated-orcid":false,"given":"Peter","family":"Persson","sequence":"first","affiliation":[{"name":"Department of Clinical Sciences Malm\u00f6 Lund University  Malm\u00f6 Sweden"},{"name":"Public Dental Service of Sk\u00e5ne  Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magnus","family":"Bladh","sequence":"additional","affiliation":[{"name":"Oral and Maxillofacial Radiology, Department of Odontology Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9343-8399","authenticated-orcid":false,"given":"Stanley","family":"Teleka","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Malm\u00f6 Lund University  Malm\u00f6 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9449-9073","authenticated-orcid":false,"given":"Aleksandar","family":"Milosavljevic","sequence":"additional","affiliation":[{"name":"Faculty of Odontology Malm\u00f6 University  Malm\u00f6 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1120-8993","authenticated-orcid":false,"given":"Nils","family":"Gustafsson","sequence":"additional","affiliation":[{"name":"Oral and Maxillofacial Radiology, Department of Odontology Ume\u00e5 University  Ume\u00e5 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva Levring","family":"J\u00e4ghagen","sequence":"additional","affiliation":[{"name":"Oral and Maxillofacial Radiology, Department of Odontology Ume\u00e5 University  Ume\u00e5 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Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K\u00e5re","family":"Buhlin","sequence":"additional","affiliation":[{"name":"Department of Dental Medicine Karolinska Institutet  Stockholm Sweden"},{"name":"Department of Oral and Maxillofacial Diseases University of Helsinki  Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter","family":"Nilsson","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Malm\u00f6 Lund University  Malm\u00f6 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marju","family":"Orho\u2010Melander","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Malm\u00f6 Lund University  Malm\u00f6 Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2581-484X","authenticated-orcid":false,"given":"Olle","family":"Melander","sequence":"additional","affiliation":[{"name":"Department of 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