[1][2] The EASI was developed in 1998 by modifying the Psoriasis Area and Severity Index (PASI), a widely accepted scoring system for psoriasis.
[3] EASI is one of the core outcome instruments recommended to be included in all clinical trials on atopic dermatitis by the Harmonising Outcome Measures for Eczema (HOME) group.
[4] Similar to the PASI, the EASI divides the body into four regions.
[5] The area of involvement is determined visually for each region, and the percentage of skin affected is converted into an area score as follows: A severity score is then calculated for each region.
The average intensity for each sign is assigned a score of 0 to 3, with 0 being none and 3 being severe.