Initial validation of the product of the signs global assessment and body surface area in atopic dermatitis

Current valid instruments that measure the signs of atopic dermatitis in clinical trials may not be suitable for clinical practice because of their complexity. The product of a clinician-derived 5-point signs global assessment and body surface area (SGA × BSA) may represent a simple approach to quickly assess the severity of signs in patients with atopic dermatitis in clinical practice. Evaluate the basic measurement properties of the SGA × BSA. Retrospective chart review of patients with atopic dermatitis treated in an outpatient dermatology clinic at Oregon Health & Science University from 2015 to 2018 who had a recorded BSA and SGA. We identified 138 patients completing 325 clinic visits. SGA × BSA demonstrated strong and statistically significant (P