DAS28-ESR

A composite score for RA disease activity using 28-joint counts, ESR and patient global assessment. Widely used for treat-to-target and clinical trials.

For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

Joint counts (0–28)

Tender joint count (TJC28)

Swollen joint count (SJC28)

ESR

mm/hr

Patient global assessment

50 / 100

0 = very well · 100 = very poor.

Live result

Enter TJC28, SJC28 and ESR (>0).

Interpretation

Formula: 0.56·√TJC + 0.28·√SJC + 0.014·PGA + 0.70·ln(ESR)

<2.6 remission · 2.6–3.2 low · >3.2–5.1 moderate · >5.1 high

Sources

Prevoo ML, et al. Modified disease activity scores. Arthritis Rheum. 1995.

For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

2010 ACR/EULAR Classification Criteria for RA

Score joint involvement, serology, acute-phase reactants and duration to classify RA.

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Rheumatoid Arthritis · Disease activity score

DAS28-CRP

28-joint disease activity score using CRP, tender/swollen joint counts and patient global.

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Rheumatoid Arthritis · Disease activity score

CDAI

Clinical Disease Activity Index. A lab-free composite for RA disease activity.

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Rheumatoid Arthritis · Prediction rule

Leiden Clinical Prediction Rule

Predicts risk of progression from undifferentiated arthritis to RA at 1 year.

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