DAS(4) = 0.54*sqrt(RAI) + 0.065*(swollen44) + 0.33*Ln(ESR) + 0.0072*GH
DAS(3) = 0.54*sqrt(RAI) + 0.065*(swollen44) + 0.33*Ln(ESR) + 0.22
DAS-4(crp) = 0.54*sqrt(RAI)+ 0.065*SJC44 + 0.17*ln(CRP+1) + 0.0072*GH + 0.45
DAS-3(crp) = 0.54*sqrt(RAI)+ 0.065*SJC44 + 0.17*ln(CRP+1) + 0.65
High disease activity >3.7, low disease activity <2.4, remission <1.6
DAS28(4) = (0.56*sqrt(t28) + 0.28*sqrt(sw28) + 0.70*Ln(ESR) + 0.014*GH
DAS28(3) = [0.56*sqrt(t28) + 0.28*sqrt(sw28) + 0.70*Ln(ESR)]*1.08 + 0.16
DAS28-CRP(4) = 0.56*sqrt(TJC28) + 0.28*sqrt(SJC28) + 0.36*ln(CRP+1) + 0.014*GH + 0.96
DAS28-CRP(3) = [0.56*sqrt(TJC28) + 0.28*sqrt(SJC28) + 0.36*ln(CRP+1)] * 1.10 + 1.15
High disease activity >5.1, low disease activity <3.2, remission <2.6
DAS28 = (1.072)*DAS) + 0.938
RAI = number of painful joints calculated with the Ritchie Articular Index
swollen = number of swollen joints from 44 joints
t28 = number of painful joints from 28 joints
sw28 = number of swollen joints from 28 joints
ESR = erythrocyte sedimentation rate in mm/first hour
GH = general health or patient's global assessment of disease activity on a 100 mm VAS