Development of the Scalp Hair Assessment PRO™ measure for alopecia areata

Valid patient‐reported outcome (PRO) measures are required to evaluate alopecia areata (AA) treatments. To develop a content‐valid and clinically meaningful PRO measure to assess AA scalp hair loss with scores comparable with the five‐response‐level Alopecia Areata Investigator Global Assessment (AA‐IGA™). A draft PRO measure was developed based on input from 10 clinical experts in AA. The PRO measure was cognitively debriefed, modified and...