Interact Deeper

Factors Contributing to Disease Severity

Psoriasis can have a large impact on patients, even for patients with more moderate disease and limited skin involvement.¹ There are several conventional clinical measures used to describe the severity of psoriasis, such as body surface area (BSA) and the Psoriasis Area and Severity Index (PASI).² BSA describes the total body surface area affected by psoriasis, while PASI accounts for the BSA affected, as well as the intensity of redness, scaling, and plaque thickness.³ However, these clinical measures do not take into account the disproportionately large impact of special areas or symptoms such as itch, nor do they consider patient-reported outcomes or perspectives.²