DAS28 = 0.56*SQRT(T28) + 0.28*SQRT(SW28)+ 0.70*Ln(ESR)+0.014*VAS

The 28 refers to the total number of joints assessed, including both shoulder joints (2), both elbow joints (2), both wrist joints (2), both metacarpophalangeal joints (10), both proximal interphalangeal joints (10), and both knee joints (2);

The tenderness examination should consider tenderness within the range of motion of each joint; swelling examination should observe from multiple angles from the front, back, and sides; skin temperature examination can assist in determining whether there is swelling.

VAS indicates the patient's subjective evaluation of pain and discomfort caused by the current disease over the past week, marked on a 0-100mm scale, where 0 means no discomfort and 100 means the most severe discomfort.

＜2.6: Clinical Remission

2.6-3.2: Low Activity

3.2-5.1: Moderate Activity

＞5.1: High Activity