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Table 1 Demographics and clinical features of participant groups at baseline

From: Interpretation of DAS28 and its components in the assessment of inflammatory and non-inflammatory aspects of rheumatoid arthritis

  ERAN BSRBR anti-TNF BSRBR-Control PPT study Repeatability
N= 813 10,813 2992 45 34
%female 70% 76% 74% 77% 73%
Age (mean (sd)) 57 (14) 56 (12) 60 (12) 60 (11) 60 (13)
Seropositive 59% 65% 58% 90% 79%
DAS28-ESR 5.2 (1.1) 6.6 (1.0) 5.4 (1.1) 4.7 (0.9) 4.8 (1.1)
ESR 34 (24) 46 (29) 37 (25) 21 (13) 39 (29)
SJC 7 (6) 11 (6) 6 (5) 1 (1) 5 (4)
TJC 9 (7) 16 (7) 9 (7) 11 (7) 6 (6)
VAS-GH 50 (24) 73 (20) 57 (23) 53 (23) 39 (20)
CRP 28 (37) 46 (42) 35 (40) < 5 not collected
  1. Eligible population: proportion (number) of cases from database with DAS28-ESR ≥ 3.2 and therefore included in this study. TJC tender joint count, SJC swollen joint count, ESR erythrocyte sedimentation rate, VAS-GH visual analogue scale-general health, CRP C-reactive protein (mg per dL)