Physician‘s Global Assessment (PGA) for Acne
Residual hyperpigmentation and eyrthema may be present
A few scattered comedones and a few small papules
Easily recognizable; less than half the face is involved
More than half the face is involved; many comedones, papules, and pustules; 1 nodule may be present
Entire face is involved; covered with comedones, numerous papules and pustules; few nodules and cysts may or may not be present
Reference: Pascoe VL, Enamandram M, Corey KC, et al. Using the Physician Global Assessment in a Clinical Setting to Measure and Track Patient Outcomes.
JAMA Dermatol. 2015;151(4):375–381. doi:10.1001/jamadermatol.2014.3513