Figure 1.

The activity of serum and urine enzymatic antioxidants (a, b, d, e, g, h, j, k), as well as serum/urine index of enzymatic antioxidants activity (c, f, i, l) of the controls, incidentaloma, pheochromocytoma, and Cushing's/Conn's adenoma patients. Results are presented as median with minimum and maximum. ^∗∗p < 0.01, ^∗∗∗p < 0.001, and ^∗∗∗∗p < 0.0001 indicate significant differences from the controls; ^^p < 0.01 and ^^^p < 0.001 indicate significant differences from the pheochromocytoma group; SOD: superoxide dismutase; CAT: catalase; GSH-Px: glutathione peroxidase; GR: glutathione reductase (GR).