Figure 4.
Decreased serum immunoglobulin levels in patients with JIA treated with MTX. A, IgM levels, B, IgG levels, and C, IgA levels in patients with JIA receiving the indicated treatments. Symbols represent individual patients; horizontal lines show the mean ± SEM. ∗ = P < 0.05; ∗∗ = P < 0.01; ∗∗∗ = P < 0.001. See Figure 1 for definitions.