Scoring Body Surface Area Involvement
Placeholder: area involvement is scored per region on a 0-6 scale.
- 0–6: Area scale (Placeholder scale range)
- 4: Regions scored (Placeholder region count)
- 90–100%: Max BSA bracket (Placeholder top bracket)
- <10%: Min BSA bracket (Placeholder low bracket)
Region area brackets
Placeholder text describing area scoring brackets briefly.
Grading Erythema Severity
Placeholder: erythema graded 0 (none) to 4 (severe) per region.
- 0–4: Erythema scale (Placeholder scale range)
- Clear: 0 = none (Placeholder grade label)
- Deep red: 4 = severe (Placeholder grade label)
- Region: Assessed per (Placeholder unit)
Erythema assessment
Placeholder text describing erythema grading briefly.
Grading Scaling Severity
Placeholder: scaling graded 0 (none) to 4 (coarse) per region.
- 0–4: Scaling scale (Placeholder scale range)
- Smooth: 0 = none (Placeholder grade label)
- Thick scale: 4 = severe (Placeholder grade label)
- Region: Assessed per (Placeholder unit)
Scaling assessment
Placeholder text describing scaling grading briefly.
Grading Plaque Thickness
Placeholder: thickness graded 0 (flat) to 4 (very thick) per region.
- 0–4: Thickness scale (Placeholder scale range)
- Flat: 0 = none (Placeholder grade label)
- Marked plaque: 4 = severe (Placeholder grade label)
- Region: Assessed per (Placeholder unit)
Thickness assessment
Placeholder text describing thickness grading briefly.
Calculating the Weighted PASI Total
Placeholder: regional weights combine into a single 0-72 PASI score.
- 0–72: PASI range (Placeholder full scale)
- 0.1: Head weight (Placeholder region weight)
- 0.3: Trunk weight (Placeholder region weight)
- 0.4: Legs weight (Placeholder region weight)
Final formula
Placeholder text describing the weighted PASI formula briefly.
Placeholder: PASI = Σ weight × (erythema+scaling+thickness) × area score.