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PASI

Psoriasis Area and Severity Index (Fredriksson 1978).

For each body region: area 0–6 (0=0%, 6=90–100%); erythema, induration and desquamation each 0–4.

Head and neck (×0.1)
Upper limbs (×0.2)
Trunk (×0.3)
Lower limbs (×0.4)
References
  1. Fredriksson T, Pettersson U. Severe psoriasis—oral therapy with a new retinoid. Dermatologica. 1978;157(4):238-244. PMID:357213