Challenges in Defining Psoriasis Severity in Clinical Practice

Panelists discuss how despite multiple psoriasis severity measurements having clinical value—body surface area (BSA) providing quick area estimates but lacking quality assessment, psoriasis area and severity index (PASI) offering comprehensive scoring but requiring training, Physician Global Assessment (PGA) delivering simple standardized physician evaluations with potential inconsistency, and patient-reported outcomes capturing critical quality-of-life impacts often missed by clinical metrics—each measure has distinct limitations that necessitate using complementary approaches for optimal treatment planning.