{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T20:57:49Z","timestamp":1790110669051,"version":"4.0.1"},"reference-count":40,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,6,14]],"date-time":"2023-06-14T00:00:00Z","timestamp":1686700800000},"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":[[2023,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Hair cosmetic products contain several, partly potent contact allergens, including excipients like preservatives. Hand dermatitis in hairdressers is common, scalp and face dermatitis in clients or self\u2010users (summarised here as \u2018consumers\u2019) may be severe.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>To compare frequencies of sensitization to hair cosmetic ingredients and other selected allergens between female patch tested patients working as hairdressers and consumers without professional background, respectively, who were tested for suspected allergic contact dermatitis to such products.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patch test and clinical data collected by the IVDK (<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/www.ivdk.org\">https:\/\/www.ivdk.org<\/jats:ext-link>) between 01\/2013 and 12\/2020 were descriptively analysed, focusing on age\u2010adjusted sensitization prevalences in the two subgroups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Amongst the 920 hairdressers (median age: 28\u2009years, 84% hand dermatitis) and 2321 consumers (median age: 49\u2009years, 71.8% head\/face dermatitis), sensitization to <jats:italic>p<\/jats:italic>\u2010phenylenediamine (age\u2010standardised prevalence: 19.7% and 31.6%, respectively) and toluene\u20102,5\u2010diamine (20 and 30.8%) were most common. Contact allergy to other oxidative hair dye ingredients was also more commonly diagnosed in consumers, whereas ammonium persulphate (14.4% vs. 2.3%) and glyceryl thioglycolate (3.9 vs. 1.2%) as well as most notably methylisothiazolinone (10.5% vs. 3.1%) were more frequent allergens in hairdressers.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Hair dyes were the most frequent sensitizers both in hairdressers and in consumers; however, as indication for patch testing may differ, prevalences cannot directly be compared. The importance of hair dye allergy is evident, often with marked coupled reactivity. Workplace and product safety need to be further improved.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cod.14363","type":"journal-article","created":{"date-parts":[[2023,6,14]],"date-time":"2023-06-14T23:01:40Z","timestamp":1686783700000},"page":"161-170","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Contact allergy to ingredients of hair cosmetics in female hairdressers and female consumers\u2014An update based on IVDK data 2013\u20132020"],"prefix":"10.1111","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4498-3710","authenticated-orcid":false,"given":"Wolfgang","family":"Uter","sequence":"first","affiliation":[{"name":"Department of Medical Informatics, Biometry and Epidemiology University of Erlangen\/N\u00fcrnberg  Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Hallmann","sequence":"additional","affiliation":[{"name":"Department of Medical Informatics, Biometry and Epidemiology University of Erlangen\/N\u00fcrnberg  Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olaf","family":"Gefeller","sequence":"additional","affiliation":[{"name":"Department of Medical Informatics, Biometry and Epidemiology University of Erlangen\/N\u00fcrnberg  Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard","family":"Brans","sequence":"additional","affiliation":[{"name":"Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) Osnabr\u00fcck University  Osnabr\u00fcck Germany"},{"name":"Department of Dermatology, Environmental Medicine and Health Theory Osnabr\u00fcck University  Osnabr\u00fcck Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cara","family":"Symanzik","sequence":"additional","affiliation":[{"name":"Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) Osnabr\u00fcck University  Osnabr\u00fcck Germany"},{"name":"Department of Dermatology, Environmental Medicine and Health Theory Osnabr\u00fcck University  Osnabr\u00fcck Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8412-2667","authenticated-orcid":false,"given":"Eva","family":"Oppel","sequence":"additional","affiliation":[{"name":"Department of Dermatology and Allergology University Hospital  Munich Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudia","family":"Lang","sequence":"additional","affiliation":[{"name":"Allergy Unit, Department of Dermatology University Hospital Zurich  Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Birger","family":"Kr\u00e4nke","sequence":"additional","affiliation":[{"name":"Department of Dermatology Medical University of Graz  Graz 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