1. What is the EASI Score?

Definition: The Eczema Area and Severity Index (EASI) is a standardized tool for measuring the severity and extent of atopic dermatitis (eczema).

Purpose: It helps clinicians assess disease severity, track changes over time, and evaluate treatment effectiveness.

2. How Does the EASI Score Work?

The EASI score is calculated using the formula:

Where:

• Severity — Rated 0-3 for erythema, induration/papulation, excoriation, and lichenification (average score used)
• Area — Percentage of affected area (0-6 scale)
• Multiplier — Region-specific weight (head/neck: 0.1, trunk: 0.3, upper limbs: 0.2, lower limbs: 0.4)

3. Importance of EASI Score

Details: The EASI score provides an objective measure of eczema severity, ranging from 0 (clear) to 72 (most severe). It's widely used in clinical trials and practice.

4. Using the Calculator

Tips: For each body region, enter the average severity score (0-3) and area score (0-6). The calculator automatically applies the correct regional multipliers.

5. Frequently Asked Questions (FAQ)

Q1: How is severity assessed?
A: Clinicians evaluate four signs: redness (erythema), thickness (induration), scratching marks (excoriation), and skin thickening (lichenification).

Q2: How is area percentage converted to the 0-6 scale?
A: 0=0%, 1=1-9%, 2=10-29%, 3=30-49%, 4=50-69%, 5=70-89%, 6=90-100%

Q3: What do different EASI scores indicate?
A: 0=clear, 0.1-1.0=almost clear, 1.1-7.0=mild, 7.1-21.0=moderate, 21.1-50.0=severe, >50.1=very severe

Q4: Why different multipliers for body regions?
A: The multipliers account for the different surface areas of body regions (e.g., legs represent more surface area than head/neck).

Q5: How often should EASI be measured?
A: Typically at each clinical visit to monitor treatment response, with more frequent assessments during flare-ups.