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Table 4 ACR improvement criteria for use in rheumatoid arthritis

From: Outcome measures in inflammatory rheumatic diseases

A patient is classified as improved if there is at least 20% improvement in five out of seven core-set variables, the first two required:
   Tender joint count
   Swollen joint count
   Acute phase reactant
   Patient rating of pain
   Patient global assessment of disease activity
   Observer global assessment of disease activity
   Physical disability
  1. ACR, American College of Rheumatology.