Table 1.

Characteristics of the training cohort and validation cohort.

Features	Training cohort	Validation cohort
	TCGA (n=522)	CGGA (n=178)
Age
≤ 45	320	135
> 45	202	43
Gender
Male	289	107
Female	233	71
Grade
II	256	102
III	265	76
NA	1	0
IDH status
Mutant	423	131
Wildtype	96	47
NA	3	0
1p/19q status
Codel	171	60
Non-codel	351	118
MGMT status
Unmethylated	91	86
Methylated	431	76
NA	0	16

IDH, isocitrate dehydrogenase; MGMT, O6 -methylguanine-DNA methyltransferase.