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Table 1 Characteristics of rheumatoid arthritis (RA) patients at baseline

From: Association of circulating levels of MMP-8 with mortality from respiratory disease in patients with rheumatoid arthritis

Number 487
Male/female 194/293
Age (SD)* 58.3 (12.5)
Age of onset (SD)* 48.9 (13.0)
Duration, years (SD)* 9.4 (8.3)
Rheumatoid factor positive (%) 283 (58.1)
Nodules (%) 84 (17.2)
Erosive (%) 405 (83.2)
HAQ (IQR) 1.625 (1.0, 2.125)
  1. *Mean values and standard deviation (SD). HAQ, Health Assessment Questionnaire; IQR, interquartile range.