CCL20 and major depressive disorder: CCL20 (F(2,93) = 9.887, p < 0.0001) demonstrated a significant increase in patients with SZ compared to HC (p = 0.001, d = 1.024) and an increase in patients with SZ compared to MDD (p = 0.001, d = 0.796) with no difference between HC and patients with MDD (p = 0.447, d = 0.358).