Table 4 Association of erosive disease with prediagnosis rheumatoid factor (RF) and anti-cyclic citrullinated peptide (anti-CCP) positivity

Variable	RF positivity before diagnosis (n = 47)		Anti-CCP positivity before diagnosis (n = 51)
Variable	No (%)*	Odds ratio (95% CI; p value)	No (%)*	Odds ratio (95% CI; p value)
Erosive disease†
Absent	21 (44.7)	Reference group	18 (35.3)	Reference group
Present	26 (55.3)	1.28 (0.51 to 3.22; p = 0.60)	33 (64.7)	4.64 (1.71 to 12.63; p<0.01)

*Number of subjects with this variable and antibody positivity; percentage out of 47 (for RF) and 51 (for anti-CCP).
†Erosive disease determined at or after time of diagnosis.