{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T20:01:53Z","timestamp":1791403313177,"version":"4.3.3"},"reference-count":54,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,11,2]],"date-time":"2022-11-02T00:00:00Z","timestamp":1667347200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100004319","name":"Pfizer","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100004319","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Journal of Dermatology"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Real\u2010world data on alopecia areata (AA) demographics, comorbidities, and treatment patterns are sparse, not only in Japan but worldwide. This cross\u2010sectional study assessed the current prevalence of AA in Japan, including analysis of severe subsets, frequency of comorbidities, and unmet medical needs surrounding treatment. Patients registered in the Japan Medical Data Center claims database (January 2012 to December 2019) and diagnosed with AA were included. Prevalence was calculated yearly, with the most common comorbidities evaluated, and treatments described in the Japanese Dermatological Association AA management guidelines and approved in Japan were included in the analysis. In total, 61\u2009899 patients were diagnosed with AA. Among them, 1497 were diagnosed with severe subtypes. AA prevalence in Japan has been gradually increasing (from 0.16% in 2012 to 0.27% in 2019). The most common comorbidities are allergic rhinitis, atopic dermatitis, and asthma. Depression and anxiety are frequent in these patients, as are autoimmune diseases, e.g., vitiligo, thyroid diseases, and rheumatoid arthritis. Intriguingly, the analysis found Down syndrome to be a comorbidity associated with severe AA in children. The principal treatments were topical corticosteroids, followed by carpronium chloride and cepharanthine. The use of systemic corticosteroids and antihistamines is increased in severe disease. The Japanese Dermatological Association guidelines do not support the use of oral corticosteroids in children; however, in the database, this has been prescribed in up to 2.5% and 9.8% of all pediatric and severe pediatric AA cases, respectively. Despite the limitations of using a claims database, the current study demonstrates that AA prevalence in Japan has gradually increased in recent years, with allergic diseases being the most common comorbidities. The data also imply that there is a need for effective and safe therapies, especially for severe and pediatric cases.<\/jats:p>","DOI":"10.1111\/1346-8138.16615","type":"journal-article","created":{"date-parts":[[2022,11,2]],"date-time":"2022-11-02T09:40:35Z","timestamp":1667382035000},"page":"37-45","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Prevalence, comorbidities, and treatment patterns of Japanese patients with alopecia areata: A descriptive study using Japan medical data center claims database"],"prefix":"10.1111","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9403-5981","authenticated-orcid":false,"given":"Eduardo","family":"Campos\u2010Alberto","sequence":"first","affiliation":[{"name":"Medical Affairs, Pfizer Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomohiro","family":"Hirose","sequence":"additional","affiliation":[{"name":"Medical Affairs, Pfizer Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lynne","family":"Napatalung","sequence":"additional","affiliation":[{"name":"Medical Affairs, Pfizer New York New\u00a0York USA"},{"name":"Icahn School of Medicine at Mount Sinai New York New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2662-5717","authenticated-orcid":false,"given":"Manabu","family":"Ohyama","sequence":"additional","affiliation":[{"name":"Department of Dermatology Kyorin University Faculty of Medicine Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,11,2]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/jidsymp.2013.4"},{"key":"e_1_2_7_3_1","first-page":"397","article-title":"Epidemiology and burden of alopecia areata: a systematic review","volume":"8","author":"Villasante Fricke A","year":"2015","journal-title":"Clin Cosmet Investig Dermatol"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/exd.14129"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/pr100422u"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1525-1470.1998.tb01348.x"},{"key":"e_1_2_7_7_1","first-page":"2741","article-title":"Guidelines for the management of alopecia areata 2017","volume":"127","author":"Tsuboi R","year":"2017","journal-title":"Jpn J Dermatol"},{"key":"e_1_2_7_8_1","first-page":"29","article-title":"Alopecia areata: more than skin deep","volume":"257","author":"MacLean KJ","year":"2013","journal-title":"Practitioner"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.3949\/ccjm.72.9.758"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaad.2006.05.008"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.4065\/70.7.628"},{"key":"e_1_2_7_12_1","doi-asserted-by":"crossref","first-page":"180","DOI":"10.2340\/0001555549180188","article-title":"Alopecia areata. 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