Clinical use
Use this calculator for psoriasis area and severity index in thedermatology workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.
Calculate PASI
Interpretation
<5 mild, 5-10 moderate, >10 moderate-severe (systemic/biologic eligible), >20 severe. PASI 75 (75% improvement) is standard trial endpoint. Required threshold for biologic prescribing in AU/UK/NZ.
Required inputs
- Head
- Trunk
- Upper Extremities
- Lower Extremities
Evidence and limitations
This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.
References
- Fredriksson T, Pettersson U. Dermatologica 1978;157:238-244
Frequently asked questions
What is the PASI Score?
PASI Score is a clinical calculator used for Psoriasis Area and Severity Index.
How do I interpret the PASI Score?
<5 mild, 5-10 moderate, >10 moderate-severe (systemic/biologic eligible), >20 severe. PASI 75 (75% improvement) is standard trial endpoint. Required threshold for biologic prescribing in AU/UK/NZ.
What inputs are required for the PASI Score?
Required inputs include Head, Trunk, Upper Extremities, Lower Extremities.
What is the evidence behind the PASI Score?
The PASI Score page cites Fredriksson T, Pettersson U. Dermatologica 1978;157:238-244.
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