Easi

Acronym for Eczema Area and Severity Index. The EASI-Score is used to objectively measure the severity and spread of atopic eczema. It has been developed in strong analogy to the well-known PASI (Psoriasis Area and Severity Index). EASI assesses the disease activity by recording the severity of the disease, its spread or the affected area. Values between 0 and 72 can be calculated. The body is divided into four different body sections for assessment: head (K), trunk (R), arms (A) and legs (B). These are then weighted differently according to their percentage of the total surface area, adapted to age:

• Patients > 8 years: K = 10%, A = 20%, R = 30%, B = 40%.
• Patients < 8 years: K = 20%, A = 20%, R = 30%, B = 30%.

The extent of the disease is then determined for each individual body section. A numerical scale is used (0 = no involvement, 1 = < 10%, 2 = 10-30%, 3 = 30-50%, 4 = 50-70%, 5 = 70-90%, 6 = 90-100%). For the assessment of severity, skin lesions are rated on a scale of 0 to 3: 0 = none, 1 = low, 2 = medium, 3 = high. Erythema, infiltration, excoriation and lichenification are assessed in detail.