Development of an Eczema Area and Severity Index Atlas for Diverse Skin Types.

Background: Current guidance for using Eczema Area and Severity Index (EASI) implementation is limited to lighter skin phototypes. We developed an EASI lesion severity atlas and refined guidance for investigators and clinicians to use across diverse patient populations. Methods: A review was performed of clinical images from internal atopic dermatitis (AD) photorepositories. Representative images of the 4 AD signs included in EASI were selected for different physician-assessed skin phototypes. Images were excluded if they had low resolution, poor focus, or lighting. Discrepancies regarding skin pigmentation and AD severity were resolved by consensus between authors. Results: Over 3000 clinical photographs were reviewed. Final images were selected using an iterative review process and consensus. Two different versions of the atlas were created across 6 physician-assessed phototypes (I-VI) and 3 skin complexions (light, medium, and dark). We propose guidance language for erythema to reflect the range of colors encountered across different skin complexions (shades of red, purple, and brown). Conclusion: We created a photographic atlas and updated guidance language for implementing EASI in diverse populations, including those with higher skin phototypes.