Table 1 Demographics of the BRASS cohort participants with 100K genotype data meeting quality control criteria (N = 531)

Mean age (SD)

58.0 ± 13.5

Mean age at RA diagnosis (SD)

41.6 ± 14.7

Mean y disease duration (SD)

16.4 ± 12.4

Female, %

82.7

New onset RA,^a %

12.8

Treated with medications at baseline

Methotrexate alone, %

31.1

Anti-TNF alone,%

22.2

Methotrexate/anti-TNF, %

17.1

CCP+, %

75.7

Anti-CCP titer, Mean (SD)

142.9 ± 121.4

RF+, %

76.4

HLA-DRB1 Shared Epitope copies, %

0

31.4

1

40.7

2

27.9