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Table 1 Characteristics of rheumatoid arthritis (RA) index cases from the investigated samples

From: The ITGAVrs3738919-C allele is associated with rheumatoid arthritis in the European Caucasian population: a family-based study

 

Sample 1 (n = 100)

Sample 2 (n = 100)

Sample 3 (n = 265)

Females (%)

87

90

86

Mean age of disease onset (years) (±standard deviation)

32 (±10)

31 (±6)

30 (±9)

Mean disease duration (years) (±standard deviation)

18 (±7)

16 (±8)

8 (±7)

RA patients with bone erosions (%)

90

79

72

RA patients seropositive for rheumatoid factor (%)

81

76

73

RA patients carrying at least one HLA-DRB1 shared epitope allele (%)

78

80

Not available

  1. n, number of cases.