TABLE 1.

Characteristics of patients with medulloblastoma in the training cohort and testing cohort.

Characteristic	Overall (n = 122)	Training cohort (n = 82)	Testing cohort (n = 30)	P-value
Sex				0.6983
Male	86 (70.5%)	64 (69.6%)	22 (73.3%)
Female	36 (29.5%)	28 (30.4%)	8 (26.7%)
Age (year)*	11.57 ± 10.61	11.60 ± 11.05	11.46 ± 9.12	0.9028
Location				0.6365
1	17 (13.9%)	13 (14.1%)	4 (13.3%)
2	7 (5.8%)	4 (4.4%)	3 (10.0%)
3	98 (80.3%)	75 (81.5%)	23 (76.7%)
Hydrocephalus				0.8482
Absent	51 (41.8%)	38 (41.3%)	13 (43.3%)
Present	71 (58.2%)	54 (58.7%)	17 (56.7%)
Molecular subgroups				0.8037
Wingless	21 (17.2%)	15 (16.3%)	6 (20.0%)
Sonic hedgehog	20 (16.4%)	16 (17.4%)	4 (13.3%)
Group 3	54 (44.3%)	40 (43.5%)	14 (46.7%)
Group 4	27 (22.1%)	21 (22.8%)	6 (20.0%)

Data are numbers of patients, with percentages in parentheses. * Data are means ± SD. 1, cerebellar hemisphere; 2, cerebellar peduncle/cerebellopontine angle cistern; 3, midline vermian/fourth ventricle.