Investigator's Global Assessment (IGA) of acne severity. (Additional content — Adapalene with benzoyl peroxide (Epiduo) for severe acne vulgaris.)

Investigator's Global Assessment (IGA) of acne severity¹⁰

0

'Clear'

Residual hyperpigmentation and erythema may be present

1

'Almost clear'

A few scattered comedones and a few small papules

2

'Mild'

Easily recognisable; less than half the face is involved. Some comedones and some papules and pustules

3

'Moderate'

More than half the face is involved. Many comedones, papules and pustules. One nodule may be present

4

'Severe'

Entire face is involved, covered with comedones, numerous papules and pustules, and few nodules and cysts