ACR 20 Response

ACR 20 Response

A measure—based on American College of Rheumatology criteria—of at least a 20% improvement in the number of tender and swollen joints, and a 20% improvement in at least 3 of the following: the patient’s global assessment of disease status; the patient’s assessment of pain; the patient’s assessment of function—measured using the Stanford Health Assessment Questionnaire; the physician’s global assessment of disease status; serum C-reactive protein levels.