Medical Calculator – SonDoctor.com

DAS28 Calculator (ESR/CRP)

Tender joints

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Selected: 0 / 28

Swollen joints

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Selected: 0 / 28

Check joints with symptoms to auto-count.

Inflammatory Marker

ESR CRP

ESR (mm/hr) Recommended range: 1–200 mm/hr

CRP (mg/L) Recommended range: 0–300 mg/L

Patient Global Assessment

50 mm

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Calculate DAS28-ESR Clear all

Result

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DAS28 (ESR/CRP) Fomula

• DAS28-ESR = 0.56·√(TJC28) + 0.28·√(SJC28) + 0.70·ln(ESR) + 0.014·GH
• DAS28-CRP = 0.56·√(TJC28) + 0.28·√(SJC28) + 0.36·ln(CRP+1) + 0.014·GH + 0.96
  • TJC28: Number of tender joints (0–28)
  • SJC28: Number of swollen joints (0–28)
  • ESR: mm/hr
  • CRP: mg/L
  • GH: Patient global health assessment visual analog scale 0–100 mm

DAS28 Result Interpretation

• Remission: < 2.6
• Low disease activity: ≤ 3.2
• Moderate disease activity: > 3.2 and ≤ 5.1
• High disease activity: > 5.1