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Table 1 Characteristics of the two rheumatoid arthritis patient populations

From: Polymorphism in the tumour necrosis factor receptor II gene is associated with circulating levels of soluble tumour necrosis factor receptors in rheumatoid arthritis

Population

Early disease

Established disease

Number

103

151

Male/Female (n)

44/59

63/88

Age (years; mean ± SD)

55.0 ± 13.4

60.2 ± 11.1

Age at onset (years; mean ± SD)

54.3 ± 13.4

46.6 ± 12.1

Disease duration (years; mean ± SD)

0.7 ± 0.5

13.7 ± 6.3

Rheumatoid factor ever positive (%)

52/92 (56.5)

86/126 (68.3)

Nodule positive (%)

4/102 (3.9)

28/150 (18.7)

  1. SD, standard deviation.