Lavian Jonathan, Li Sara Jiayang, Lee Eunice Yoojin, Bordone Lindsey A, Polubriaginof Fernanda C G, Christiano Angela M, Mostaghimi Arash
Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA.
Department of Dermatology, Brigham and Woman's Hospital, Harvard Medical School, Boston, MA, USA.
Int J Trichology. 2020 Sep-Oct;12(5):234-237. doi: 10.4103/ijt.ijt_67_20. Epub 2020 Nov 3.
Search algorithms used to identify patients with alopecia areata (AA) need to be validated prior to use in large databases.
The aim of the study is to assess whether patients with an International Statistical Classification of Diseases and Related Health Problems (ICD) 9 or 10 code for AA have a true diagnosis of AA.
A multicenter retrospective review was performed at Columbia University Irving Medical Center, Brigham and Women's Hospital, and Massachusetts General Hospital to determine whether patients with an ICD 9 codes (704.01 - AA) or ICD 10 codes (L63.0 -Alopecia Totalis, L63.1 - Alopecia Universalis, L63.2 - Ophiasis, L63.8 - other AA, and L63.9 - AA, unspecified) for AA met diagnostic criteria for the disease.
Of 880 charts, 97.5% had physical examination findings consistent with AA, and 90% had an unequivocal diagnosis. AA was diagnosed by a dermatologist in 87% of the charts. The positive predictive value (PPV) of the ICD 9 code 704.01 was 97% (248/255). The PPV for the ICD 10 codes were 64% (75/118) for L63.0, 86% (130/151) for L63.1, 50% (1/2) for L63.2, 91% (81/89) for L63.8, and 93% (247/265) for L63.9. Overall, 89% (782/880) of patients with an ICD code for AA were deemed to have a true diagnosis of AA.
Patients whose medical records contain an AA-associated ICD code have a high probability of having the condition.
用于识别斑秃（AA）患者的搜索算法在用于大型数据库之前需要进行验证。
本研究的目的是评估患有国际疾病和相关健康问题统计分类（ICD）9或10编码的AA患者是否真正被诊断为AA。
在哥伦比亚大学欧文医学中心、布莱根妇女医院和马萨诸塞州总医院进行了一项多中心回顾性研究，以确定患有ICD 9编码（704.01 - AA）或ICD 10编码（L63.0 - 全秃，L63.1 - 普秃，L63.2 - 匐行性脱发，L63.8 - 其他斑秃，以及L63.9 - 未特指的斑秃）的AA患者是否符合该疾病的诊断标准。
在880份病历中，97.5%的患者有与AA一致的体格检查结果，90%的患者有明确诊断。87%的病历由皮肤科医生诊断为AA。ICD 9编码704.01的阳性预测值（PPV）为97%（248/255）。ICD 10编码中，L63.0的PPV为64%（75/118），L63.1为86%（130/151），L63.2为50%（1/2），L63.8为91%（81/89），L63.9为93%（247/265）。总体而言，89%（782/880）的患有AA相关ICD编码的患者被认为真正诊断为AA。
病历中包含AA相关ICD编码的患者患该病的可能性很高。
