Fig. 2.

Scatter dot plot of serum chemokine (C-X-C motif) ligand 10 (CXCL10) expression from patients with psoriatic arthritis (PsA; n = 47) and healthy control subjects (n = 33). The data are presented as log₁₀-transformed values to better visualize the absolute change in concentrations. CXCL10 levels were higher in patients with PsA (median 0.31 ng/ml, interquartile range [IQR] 0.20–0.44 ng/ml) than in healthy control subjects (median 0.21, IQR 0.14–0.28 ng/ml; p = 0.0007 by Mann-Whitney U test). ***p < 0.001