TABLE 1.

IGA grading system

GRADE	DESCRIPTION	ACNE DISEASE STATUS
0	Clear	No papules/pustules present; no nodules present; no comedones present; residual hyperpigmentation and/or erythema may be present; acne scars may be present
1	Almost clear	A few scattered small papules/pustules may be present; no nodules present; a few scattered comedones may be present
2	Mild	Some papules/pustules present; no nodules present; some comedones may be present
3	Moderate	Many papules/pustules present; up to two nodules may be present; some or many comedones may be present
4	Severe	Several papules/pustules and many nodules (more than two) present; some to several comedones may be present
5	Very severe	Highly inflammatory acne with several papules/pustules covering the face with several nodules present; some to several comedones may be present