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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