Table 1.

Patient characteristics.

	Training	Validation	P value
Age(years, mean)	37.2	35.63	0.61a
Sex(Male/Female)	129/96	58/52	0.43b
Peritumoral edema	48/177	19/91	0.38b
Tumor invasiveness	65/120	31/79	0.22b

^aMann-Whitney U test, ^bChi-square test.