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Table 1 Characteristics of patients with rheumatoid arthritis (RA), ankylosing spondylitis (AS), psoriatic arthritis (PsA) and the general population (healthy controls)

From: The health-related quality of life in rheumatoid arthritis, ankylosing spondylitis, and psoriatic arthritis: a comparison with a selected sample of healthy people

  Rheumatoid arthritis
(n = 469)
Ankylosing spondylitis
(n = 164)
Peripheral
psoriatic arthritis
(n = 101)
Axial
psoriatic arthritis
(n = 65)
General population
(n = 1579)
Women (%) 71.8 18.9 61.4 50.7 50.2
Age (years)      
    - mean (± SD) 57.5 (14.3) 51.7 (9.2) 60.7 (11.6) 58.2 (10.3) 55.2 (19.2)
Disease duration      
    - mean (± SD) 6.1 (4.2) 8.2 (4.6) 7.5 (5.3) 8.4 (4.3) NA
Educational level, n (%)      
    - primary school 240 (51.2) 70 (42.7) 45 (44.6) 30 (46.1) 928 (58.8)
    - secondary school 149 (31.8) 65 (39.6) 43 (42.6) 25 (38.5) 418 (26.5)
    - high school/university 80 (17.0) 29 (17.7) 13 (12.8) 10 (14.4) 233 (14.7)
No of comorbid conditions, n (%)      
    - none 217 (46.3) 73 (44.5) 45 (44.6) 19 (29.3) 548 (34.7)
    - 1 131 (27.9) 37 (22.6) 26 (25.7) 12 (18.5) 334 (33.5)
    - 2 47 (10.0) 30 (18.3) 13 (12.9) 21 (32.3) 112 (7.1)
    - 3 20 (4.3) 15 (9.1) 15 (14.8) 10 (15.4) 69 (4.4)
    - 4 25 (5.3) 6 (3.7) 2 (2.0) 2 (3.0) 21 (1.3)
    - 5 or more 29 (6.2) 3 (1.8) 0 (0) 1 (1.5) 12 (0.8)
Comorbidity score by SCQ 4.35 (3.1) 2.48 (1.9) 3.75 (2.5) 3.34 (2.1) 1.95 (1.9)
    - mean (± SD)      
DAS      
    - mean (± SD) 4.5 (0.8) -- 4.4 (0.9) -- NA
BASDAI -- 54.7 (17.2) -- 53.8 (14.4) NA
    - mean (± SD)      
Rx Sharp score 59.4 (32.9) -- 62.1 (39.1) -- NA
    - mean (± SD)      
mSASSS      
    - mean (± SD) -- 14.7 (5.2) -- 13.7 (5.1) NA
PASI      
    - mean (± SD) -- -- 7.1 (3.3) 6.7 (2.9) NA
  1. NA = non applicable
  2. Abbreviations: DAS = Disease Activity Score; BASDAI = Bath Ankylosing Spondylitis Disease Activity index; mSASSS = modified Stoke Ankylosing Spondylitis Spine Score; PASI = Psoriasis Area and Severity Index