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Table 1 The clinical characteristics of the rheumatoid arthritis and control groups

From: Relation between pulmonary function tests and ultrasonographic changes of asymptomatic anterior chest wall joints in rheumatoid arthritis patients

  RA Control T test P
Age (years) mean ± SD 45.5 ± 9.8 43.4 ± 7.7 0.7 0.5
Sex (male) n (%) 8 (36) 9 (40.9) 2.2 0.6
Age of onset (years) (mean ± SD) 25.5 ± 4.6 NA NA NA
Duration (years) (mean ± SD) 8.2±2.7 NA NA NA
Chest expansion (mean ± SD) 2 ± 1.6 3 ± 0.6 0.7 0.8
Seropositive RF 15 (68.2%) 0 (0%) 3 0.007*
Anti-ccp2 17(68.2%) 0(0%) 2.2 0.02*
DAS28-ESR (mean ± SD) 4.9 ± 0.7 NA NA NA
mHAQ (mean ± SD) 5 ± 1.09 NA NA NA
Medications n(%
 Biological DMARDs 11 (50) NA NA NA
 Conventional DMARDs 5 (22.7)    
  1. RA rheumatoid arthritis, SD standard deviation, n number
  2. RF rheumatoid factor, Anti-ccp2 anti-cyclic citrullinated peptide, mHAQ modified health assessment questionnaire, DAS disease activity score, ESR erythrocyte sedimentation rate, DMARDs disease modifying agents for rheumatic diseases, NSAIDs non-steroidal anti-inflammatory drugs, NA not applicable