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Table 1 Demographic and clinical characteristics of adults with rheumatoid arthritis participating in the accelerometry trial (n = 35)

From: Validity of the Nurses’ health study physical activity questionnaire in estimating physical activity in adults with rheumatoid arthritis

Variable Number (%) Mean (SD) Median (IQR)
Female 28 (80)   
Caucasian 34 (97)   
Age (y)   62 (10) 62 (52–68)
Married 30 (86)   
Employed 13 (37)   
Graduated high school/attended college 14 (40)   
Graduated college/attended graduate school 21 (60)   
Disease Duration (y)   21 (11) 19 (11–32)
Medications
 Biological DMARDs 22 (63)   
 Methotrexate 18 (51)   
 TNF inhibitor 18 (51)   
 NSAIDs 12 (34)   
 Steroids 14 (40)   
Disease markers
 Rheumatoid factor >15 21 (60)   
 Anti-CCP positive 24 (69)   
 Seropositive 25 (71)   
 DAS-CRP3a   3.2 (1.5) 2.9 (1.9–4.3)
Disease activity (RADAI)   2.9 (2.1) 2.3 (1.2–4.7)
Self-reported outcomes (PROs)
 Multi-dimensional health Assessment
 Questionnaire (MDHAQ)
  0.62 (0.54) 0.55 (0.1–1.0)
 Quality of life (Euroqol Index)   0.8 (0.2) 0.8 (0.7–0.8)
 Mental health score (MHI-5)b   79 (17.4) 83 (73–90)
Performance Measures
 20 m Timed walk (s)
  Number of steps   28 (4.5) 26 (24.3–30.7)
  Time taken (seconds)   16.1 (3.8) 15.7 (12.9–17.4)
  Timed Step test (METs)a   4.7 (0.8) 4.8 (4.3–5.1)
  1. aFrequency Missing = 1
  2. bFrequency Missing = 4
  3. SD Standard deviation
  4. IQR Interquartile range