The Japanese Dermatological Association established an advisory committee in 1995 to develop a severity scoring system for atopic dermatitis (AD). Its interim and concluding reports were published in Japanese in the Japanese Journal of Dermatology (108: 1491-1496, 1998 and 111: 2023-2033, 2001). Because of the strong demand for an English version, we have decided to publish the reports in English. This manuscript is the English version of the concluding report. The interim report suggested that eruption components such as erythema, papule, erosion, crust, excoriation and lichenification with extent of involved areas in five body regions, including the head and neck, anterior and posterior trunks, and upper and lower limbs, were important items for assessing AD severity. Additionally, it was recommended that streamlining of eruption components was mandatory for improving the statistical validity and reliability. The committee members subsequently concentrated their efforts on this task, and finally proposed an Atopic Dermatitis Severity Classification Criteria of the Japanese Dermatological Association.
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