3
Assessment
Table 3. Instruments to Measure Rheumatoid Arthritis
Disease Activity and to Define Remission
a
Instrument
Thresholds of
Disease Activity
Patient Activity Scale (PAS) or PASII
7
Remission: 0–0.25
Low activity: >0.25–3.7
Moderate activity: >3.7–<8.0
High activity: ≥8.0
Range 0–10
Routine Assessment of Patient Index Data 3
(RAPID3)
8
Remission: 0–1.0
Low activity: >1.0–2.0
Moderate activity: >2.0–4.0
High activity: >4.0–10
Range 0–10
Clinical Disease Activity Index (CDAI)
9
Remission: ≤2.8
Low activity: >2.8–10.0
Moderate activity: >10.0–22.0
High activity: >22
Range 0–76.0
Disease Activity Score (DAS) 28
erythrocyte sedimentation rate (ESR)
10
,
b
Remission: <2.6
Low activity: ≥2.6–<3.2
Moderate activity: ≥3.2–≤5.1
High activity: >5.1
Range 0–9.4
Simplified Disease Activity Index (SDAI)
11
Remission: ≤3.3
Low activity: >3.3–≤11.0
Moderate activity: >11.0–≤26
High activity: >26
Range 0–86.0
a
ese six measures were endorsed by the ACR in 2012. Other measures are now available to
clinicians, but they were not included in this guideline because it was beyond the scope of this
review.
b
Adapted from Anderson J et al.
1
