DAS28 (CRP) = 0.56∗√ (TJC28) + 0.28∗√ (SJC28) + 0.014∗ GH + 0.36 ∗ln (CRP+1) + 0.9 6 RA disease activity was determined according to the following scores: remission (DAS28 ≤ 2.6), low activity LDA (2.6 < DAS28 ≤ 3.2), moderate activity MDA (3.2 < DAS28 ≤ 5.1), and high activity HAD (DAS28 > 5.1). Here, CRP is linked to rheumatoid arthritis.