Figure 2.

The differences of absolute numbers of CD4⁺T subgroups between PsA patients (including new-onset and treated) and healthy controls. (a, b, c, e) Absolute numbers (cells/µL) of Th1, Th2, and Th17 cells and the ratio of Th1/Th2 in PB were not significantly different among the healthy controls (n = 106), new-onset (n = 21), and previously treated patients (n = 74). (d, f) The absolute numbers of Tregs in PB were lower and the ratio of Th17/Treg was higher in PsA patients (including new and treated) than healthy controls, while there was no statistical difference between new-onset and treated patients in these indicators. Data are presented as median (range). Statistical analysis was performed using the Independent-Samples Kruskal–Wallis H test.

PsA, psoriatic arthritis; PB, peripheral blood; Tregs, regulatory T cells.

*p < 0.05, **p < 0.01, ***p < 0.001. Asymptotic significances (2-sided tests) were displayed. The significance level was p < 0.05.