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Table 1 Demographic data of classified patients according to the joint index vector

From: Joint index vector: a novel assessment measure for stratified medicine in patients with rheumatoid arthritis

  N Disease duration Age Female (%) SDAI HAQ-DI
LDA 5135 11.9 (10.4) 64.5 (13.3) 76.7 2.8 (2.7) 0.4 (0.7)
EVN 2718 13.7 (11.1) 65.0 (12.5) 82.9 8.7 (6.8) 0.7 (0.8)
SML 797 12.1 (10.4) 62.1 (12.9) 82.2 14.0 (10.4) 0.7 (0.8)
LAR 2363 15.2 (11.7) 66.7 (12.5) 83.9 11.4 (7.0) 1.0 (0.9)
Total 11,013 13.1 (10.9) 64.9 (13.0) 80.2 6.9 (7.1) 0.6 (0.8)
  1. Data are shown as mean (SD) unless otherwise described
  2. SDAI Simplified Disease Activity Index, HAQ-DI the disability index of the Health Assessment Questionnaire, LDA low disease activity (|Vxy| ≤ 0.1), EVN evenly affected (|Vxy| > 0.1 and |z| ≤ 0.2), SML small joints dominant (|Vxy| > 0.1 and z < − 0.2), LAR large joints dominant (|Vxy| > 0.1 and z > 0.2)