Journal of Rheumatic Diseases

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Fig. 1. (A) ACPA positivity and the three ACPA subgroups with respect to SE status. ACPA was divided into three categories: <5 U/mL (negative), 5~200 U/mL (low to moderate level), and >200 U/mL (high level). (B) ACPA positivity for different combination of smoking and SE status. Categorical comparison between the two groups was verified using the Chi-squared test. The number (percentage) is marked in the middle of each bar. ACPA: anti-cyclic citrullinated protein antibody, SE: shared epitope.
J Rheum Dis 2022;29:171~180
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