Fig. 3

Relationship between anti-citrullinated peptide antibody (ACPA) titers and serum levels of galectin-9 in patients with rheumatoid arthritis (RA). a Levels of ACPA titers were measured, and correlation analysis with serum levels of galectin-9 was performed. b Correlation analysis of serum levels of galectin-9 and ACPA titers does not show a relationship in RA patients with low titers of ACPA (< 200 U/ml), whereas there was a significant positive correlation between serum levels of Gal-9 and ACPA titers in RA patients with high titers of ACPA (≧ 200 U/ml)