Table 1:

Patient clinical characteristics^{^a}

Clinical Characteristics	Training Set		Test Set, Institution 2	P Value^{^b}
Clinical Characteristics	Institution 1	TCGA	Test Set, Institution 2	P Value^{^b}
No. of patients	32	32	57
Age (yr)	49.0 [SD, 19.1]	51.1 [SD, 14.7]	53.4 [SD, 16.2]	.291
Sex (male/female)	19:13	17:15	27:30	.901
WHO grade				.800
Grade II	16 (50.0%)	9 (28.1%)	23 (40.4%)
Grade III	16 (50.0%)	23 (71.9%)	34 (59.6%)
Molecular GBM status				.053
With molecular features of GBM	21 (65.6%)	26 (81.3%)	32 (56.1%)
Without molecular features of GBM	11 (34.4%)	6 (18.7%)	25 (43.9%)

↵a Data are expressed as a mean [SD] or as a number with percentage in parentheses.
↵b Comparisons between the training and the test sets using the Student t test for continuous variables and the χ² test for categoric variables.