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 |