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Table 1 Clinical features of the patients with rheumatoid arthritis a

From: Lack of replication of interactions between polymorphisms in rheumatoid arthritis susceptibility: case–control study

Clinical characteristics RA patients
Women (%) 75.7
Median age at disease onset (IQR)b 47 (37 to 57)
Morning stiffness (%) 96.2
Arthritis in three or more joint areas (%) 99.7
Arthritis of hand joints (%) 99.3
Symmetric arthritis (%) 99.1
Rheumatoid nodules (%)b 20.3
Rheumatoid factor (%) 71.2
Erosions (%) 68.6
Sicca syndrome (%) 8.9
Interstitial pneumonitis (%) 2.7
Shared epitope (carrier %)b 55.0
Anti-CCP (%)b 67.3
  1. aCCP, Cyclic citrullinated peptide; RA, Rheumatoid arthritis. bData were available for <85% of the patients: 1,349 for age of disease onset, 1,283 for rheumatoid nodules and 736 for shared epitope and anti-CCP antibodies.