Table 1.

Clinical characteristics of patients with RA. Values are mean ± SD or n.

Without Pulmonary Fibrosis, n = 87With Pulmonary Fibrosis, n = 44p
Age, yrs60.8 ± 14.365.3 ± 9.40.062
Female:male73:1434:100.354
Duration of RA, yrs13.2 ± 10.710.6 ± 9.20.163
RF positive:negative73:1442:20.088
CRP, mg/ml2.00 ± 1.732.35 ± 1.820.081

  • RF: rheumatoid factor; CRP: C-reactive protein.