Table 1. Patients’ characteristics.

Characteristics		GPX2 expression		p-value
		Low level group (n=83)	High level group (n=86)
Median age, years (range)		72 (37-90)	70 (38-87)	n.s.
Sex	Male (%)	65 (78.3)	63 (73.3)	n.s.
	Female (%)	18 (21.7)	23 (26.7)
Non-invasive or invasive	Non-invasive (%)	3 (0.6)	21 (24.4)	<0.0001****
	Invasive (%)	80 (96.4)	65 (75.6)
Size of main tumor, mm (range)		21 (7-100)	21 (7-65)	n.s.
Solitary or multiple	Solitary (%)	25 (30.1)	30 (34.9)	n.s.
	Multiple (%)	58 (69.9)	56 (65.1)

GPX2: Glutathione peroxidase 2, n.s.: not significant.

^****p < 0.0001 statistically significant.