Comparison of DAS28-CRP response in PsA versus RA patients over time. 2a DAS28-CRP in PsA (dotted line) is compared to RA (solid black line). Remission represented by the line at DAS28 value of 2.6. There is a highly significant response of PsA compared to RA at all time points. 2b shows a subgroup of patients matched for disease activity at baseline (n = 41 in each group) and similar dramatic response.