Fig. 2

Plasma immune markers associated with the severity of symptoms characterizing unipolar major depression. The median concentration of the plasma immune markers in old patients with unipolar major depression and old non-depressed controls are illustrated by the boxes. First and third quartiles are illustrated by the error bars. Abbreviations: pg/ml, picogram/millilitre; TNF, tumour necrosis factor; VEGF, vascular endothelial growth factor; IL, interleukin; MCP-1, monocyte chemotactic protein