Psoriasis Severity Classification (PGA) - Scientific Formula
Dermatology Equation
Standard Calibration Equation:
Scores clinical plaque thickness, scaling, and erythema from 0 (clear) to 5 (severe).
Accuracy Bounds & Limits:
While mathematical calculators evaluate demographic models, extreme variance (hyperthyroidism, dialysis cases, muscular bodybuilders, pregnancy) can trigger output errors. Weight and clearance assessments must follow separate personalized titration grids.