Table 1. Demographic and clinical characteristics of the enrolled patients in the training and test cohorts.

Characteristics	Train cohort (n=101), institution 1	Test cohort (n=50)			P value 2
		Institution 2	Institution 3	P value 1
Age, mean ± SD, years	48.17±12.44	43.23±7.47	45.67±13.65	0.648	0.464
Gender				0.295	0.605
Male	61 (60%)	15 (30%)	13 (26%)
Female	40 (40%)	15 (30%)	7 (14%)
Grades of gliomas (%)				0.248	0.388
HGG	43 (43%)	17 (34%)	8 (16%)
LGG	58 (57%)	13 (26%)	12 (24%)

SD, standard deviation; HGG, high grade glioma; LGG, low grade glioma.