TABLE 1.

Demographic data and clinical factors.

Parameters	TCGA (N = 553)	CGGA (N = 749)
Age
≤40	266 (48.10%)	342 (45.66%)
>40	287(51.90%)	407 (54.34%)
Gender
Male	232 (41.95%)	442 (59.01%)
Female	321 (58.05%)	307 (40.99%)
Tumor grade
WHO II	197 (35.62%)	218 (29.11%)
WHO III	217 (39.24%)	240 (32.04%)
WHO IV	139 (25.14%)	291 (38.85%)
Grade malignance
Low grade glioma	414 (74.86%)	458 (61.15%)
Glioma	139 (25.14%)	291 (38.85%)
IDH mutation
Mutation	345 (62.39%)	410 (54.74%)
Wild	208 (37.61%)	339 (45.26%)
1p/19q codeletion
No codeletion	412 (74.50%)	594 (79.31%)
codeletion	141 (25.50%)	155 (20.69%)
Chemotherapy
No	185 (33.45%)	229 (30.57%)
Yes	368 (66.55%)	520 (69.43%)
Radiotherapy
No	164 (29.66%)	124 (16.56%)
Yes	389 (70.34%)	625 (83.44%)