Reliable and easy-to-use calculating tool for the Nail Psoriasis Severity Index using deep learning

Nail psoriasis significantly impacts patients' daily lives, highlighting the need for reliable evaluation tools to guide therapeutic interventions. The Nail Psoriasis Severity Index (NAPSI) is a validated scoring system, but its practical application is hampered by interobserver variability. This study presents a deep learning-based tool, the "NAPSI calculator," designed to address this limitation. The tool comprises two stages: nail detection and NAPSI scoring. Evaluation on a test set demonstrated the "NAPSI calculator's" superior accuracy compared to both non-board-certified residents and board-certified dermatologists without nail expertise, showcasing its potential to improve clinical practice for nail psoriasis management.

Hiroto Horikawa, Keiji Tanese, Naoki Nonaka, Jun Seita, Masayuki Amagai, Masataka Saito