Changes in DAS28 (utilizing hsCRP) from baseline up to Month 60. The DAS28 is a measure of disease activity in PsA based on Swollen and Tender Joint Counts (out of a total of 28), hsCRP and the Patient's Global Assessment of Disease Activity. A DAS28 score greater than 5.1 implies active disease, equal to or less than 3.2 low disease activity, and less than 2.6 remission. This measure represents change in scores - not the actual scores.
DAS28 is a combined measure of disease activity based on the following formula:
DAS28-CRP = 0.56*TJC28^0.5 + 0.28*SJC28^0.5 + 0.36*ln(CRP+1) + 0.014*PGA + 0.96 The greater the score is, the more the disease activity exists. Remission is defined as DAS28-CRP < 2.6 Low disease activity is defined as DAS28-CRP < 3.2 The minimum value can be 0.96 (not applicable in our study due to the inclusion/exclusion criteria regarding tender, swollen joints). There is no maximum expected value for this score