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Table 2 Baseline characteristics of patients from the three cohorts, ranked by median HAQ score

From: Exploring the validity of estimating EQ-5D and SF-6D utility values from the health assessment questionnaire in patients with inflammatory arthritis

  STIVEA BROSG BSRBR  
  n = 224 n = 453 n = 795 p-value*
Age (years) 59 (44, 66) 62 (53, 69) 59 (51, 67) <0.001
Disease duration (years) 0.16 (0.12, 0.19) 11 (7, 16) 9 (3, 18) <0.001
Female gender, n(%) 160 (72%) 308 (68%) 604 (76%) 0.009†
HAQ 1.3(0.6, 1.6) 1.5 (0.9, 2.0) 1.8 (1.1, 2.1) <0.001
DAS28 5.5 (4.8, 6.4) 4.0 (3.2, 4.9) 6.0 (5.1, 6.8) <0.001
28-Tender joint count 9 (5, 15) 3 (1, 8) 12 (6, 19) <0.001
28-Swollen joint count 8 (5, 12) 3 (1, 6) 7 (4, 12) <0.001
  1. Values are median (IQR) unless otherwise stated. * Kruskal-Wallis; † Chi-square
  2. Abbreviations: BROSG = British Rheumatoid Outcome Study Group, BSRBR = British Society for Rheumatology Biologics Register, DAS28 = Disease Activity Score based on 28 swollen and tender joint counts, HAQ = Health Assessment Questionnaire, STIVEA = Steroids In Very Early Arthritis,