Figure 1.

ACR20 response in patients with and without prior TNF inhibitor treatment. *P = 0.028, **P < 0.0015. Data from Kristensen et al. [28]. ACR20, 20% improvement in American College of Rheumatology criteria; TNF, tumour necrosis factor.

Rubbert-Roth and Finckh Arthritis Research & Therapy 2009 11(Suppl 1):S1   doi:10.1186/ar2666