Disease Activity Score (DAS)
(van der Heijde et al.: Ann Rheum Dis 1990;49:916)
DAS = 0.54 ( ) + 0.065
(SwJts) + 0.33 (ESR) + 0.0072 (GH)
RAI: Ritchie
Articular Index (measurement ofjoint tenderness)
SwJts:
number of Swollen Joints
ESR: Erythrocyte
Sedimentation Rate
GH: General Health status (by 100 mm visual
analog scale)
DAS < 1.0:
no activity
1.0 - <2.4: low activity
2.5 - <3.7: moderate activity
> 3.7:
high level of disease activity
