Table 1.

The severity of cutaneous psoriasis.

Mild	Moderate	Severe
BSA <3%	3% ≤ BSA <10%	BSA≥10%
PASI <3	3 ≤ PASI <10	PASI≥10
IGA=1	IGA=2	IGA=3/4

BSA, body surface area; PASI, psoriasis area and severity index; IGA, investigator's global assessment.