{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,11]],"date-time":"2025-07-11T10:16:10Z","timestamp":1752228970835,"version":"3.38.0"},"reference-count":7,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,12,30]],"date-time":"2024-12-30T00:00:00Z","timestamp":1735516800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Contact Dermatitis"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Registry\u2010based data are increasingly used in dermatological research. A recent epidemiological study has shown that the use of non\u2010specific diagnostic codes is common among dermatologists.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To study closely the use of the diagnostic codes L23.8 (\u2018allergic contact dermatitis [ACD] for other agents\u2019) and L23.9 (\u2018ACD with unspecified cause\u2019) by using single\u2010centre data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Patients\/Materials\/Methods<\/jats:title><jats:p>This retrospective study included all patients whose record contained at least one entry of either code, recorded at the Oulu University Hospital, Finland, between the Years 1999 and 2022.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The database search retrieved records of 472 patients with the L23.8 code, 264 patients with L23.9. Over the 20\u2010year follow\u2010up period, the use of L23.8 increased and that of L23.9 decreased. In most (85.1%) cases, the L23.8 code was used even though the more specified L23 code could have been chosen. In one\u2010third of cases, L23.8 was used to cover ACD with multiple allergens that would otherwise be identified by their specific sub\u2010codes. The L23.9 code was used most often prior to patch testing (69.1% cases).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This study revealed several imprecisions in the use of both codes. Our study highlights the importance of correct coding in clinical practice, as it emphasises the most common pitfalls.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cod.14744","type":"journal-article","created":{"date-parts":[[2024,12,31]],"date-time":"2024-12-31T06:24:33Z","timestamp":1735626273000},"page":"273-276","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Imprecise Coding in Allergic Contact Dermatitis: A Register\u2010Study From Northern Finland Between Years 1999 and 2022"],"prefix":"10.1111","volume":"92","author":[{"given":"Jenni","family":"K\u00e4m\u00e4r\u00e4inen","sequence":"first","affiliation":[{"name":"Faculty of Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Touko","family":"Loukkola","sequence":"additional","affiliation":[{"name":"Faculty of Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joanna","family":"Mikkola","sequence":"additional","affiliation":[{"name":"Faculty of Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Minna","family":"Sivonen","sequence":"additional","affiliation":[{"name":"Faculty of Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jari","family":"Jokelainen","sequence":"additional","affiliation":[{"name":"Northern Finland Birth Cohorts, Arctic Biobank, and Infrastructure for Population Studies University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eetu","family":"Kiviniemi","sequence":"additional","affiliation":[{"name":"Northern Finland Birth Cohorts, Arctic Biobank, and Infrastructure for Population Studies University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Huilaja","sequence":"additional","affiliation":[{"name":"Department of Dermatology Oulu University Hospital  Oulu Finland"},{"name":"Research Unit of Clinical Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6496-5475","authenticated-orcid":false,"given":"Suvi\u2010P\u00e4ivikki","family":"Sinikumpu","sequence":"additional","affiliation":[{"name":"Department of Dermatology Oulu University Hospital  Oulu Finland"},{"name":"Research Unit of Clinical Medicine University of Oulu  Oulu Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,12,30]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/J.IAC.2016.08.014"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/COD.13119"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/COD.14688"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/J.ATHORACSUR.2018.12.060"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/COD.13704"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/COD.12726"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/BJD.20656"}],"container-title":["Contact Dermatitis"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/cod.14744","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,3,12]],"date-time":"2025-03-12T07:43:39Z","timestamp":1741765419000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/cod.14744"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,12,30]]},"references-count":7,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2025,4]]}},"alternative-id":["10.1111\/cod.14744"],"URL":"https:\/\/doi.org\/10.1111\/cod.14744","archive":["Portico"],"relation":{},"ISSN":["0105-1873","1600-0536"],"issn-type":[{"type":"print","value":"0105-1873"},{"type":"electronic","value":"1600-0536"}],"subject":[],"published":{"date-parts":[[2024,12,30]]},"assertion":[{"value":"2024-10-14","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-12-13","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-12-30","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}