SEVERITY | MEASURES* |
---|---|
Mild |
|
Moderate |
|
Severe |
|
BSA—body surface area, QoL—quality of life.
↵* These are definitions for clinical practice, as applied in the Canadian guideline. The Psoriasis Area and Severity Index is another measure of disease severity, based on BSA, erythema, induration, and scaling.
↵† The size of a single hand is estimated to be 1% BSA.
Data from the Canadian Psoriasis Guidelines Committee.1