Table 1.

Metrics Used for Defining Disease Severity.

Measure	Description
Copenhagen Psoriasis Severity Index (CoPSI)1	An index that comprises the assessment of 3 signs: erythema, plaque thickness, and scaling, each on a 4-point scale (0, none; 1, mild; 2, moderate; 3, severe), at each of 10 sites: face, scalp, upper limbs (excluding hands and wrists), hands and wrists, chest and abdomen, back, buttocks and sacral area, genitalia, lower limbs (excluding feet and ankles), and feet and ankles.
Children’s Dermatology Life Quality Index (CDLQI)2,3	Dermatology Life Quality Index (DLQI) modified for use in children. It comprises 10 questions and, like the adult version, assesses 6 domains of health-related quality of life (HRQoL): symptoms and feelings, leisure, school or holidays, personal relationships, sleep, and treatment. Each question has 4 possible responses, scored from 0 to 3. Possible total scores range from 0 (no impairment) to 30 (maximum impairment).
Scalp Life Quality Index (SLQI)4	DLQI modified for the scalp.