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Table 2 Values of composite indices in the two cohorts.

From: Acute phase reactants add little to composite disease activity indices for rheumatoid arthritis: validation of a clinical activity score

Composite scores (rangea) Routine cohort (n = 767) Inception cohort (n = 105)
  Median 1st;3rd Quartile Range Median 1st;3rd Quartile Range
DAS28 (0.5–9.1) 4.09 2.99;5.17 0.50–8.56 5.62 4.81;6.44 2.84–8.28
DAS28-CRP (1.0–8.5) 3.78 2.71;4.82 1.60–8.28 4.67 4.04;5.50 2.35–7.42
SDAI (0–86) 16.7 8.1;26.7 0.5–78.9 29.0 20.1;41.6 7.5–77.0
CDAI (0–76) 14.8 6.5;23.3 0–67.8 25.6 17.1;37.9 6.3–70.2
  1. aMaximum possible ranges of acute phase reactants assumed: 5–100 mm for erythrocyte sedimentation rate; 0–10 mg/dl for C-reactive protein (CRP). CDAI, Clinical Disease Activity Index; DAS, Disease Activity Score; SDAI, Simplified Disease Activity Index.