Figure 1 .

(A) Disease activity by DAS28 in patients treated first with etanercept, then with infliximab. Values shown are the mean value at baseline (before etanercept treatment), mean best value during etanercept treatment, mean value at last visit while on etanercept (when the decision to switch was made), mean best value with infliximab. Comparisons are by paired two tailed Student's t test. (B) Swollen joint count in patients treated first with etanercept, then with infliximab. Values shown are the means at baseline and after three months for each treatment. Comparisons are by paired two tailed Student's t test.