Table 1. Univariate analysis of prognostic factors for OS and EFS in medulloblastoma patients (n = 173).

Factors	No. of cases	5-year OS(%)	p-value	5-year EFS(%)	p-value
Sex
Male	112	49.8	0.216	43.2	0.384
Female	61	55.5		48.6
Age
Children	118	47.6	0.090	41.9	0.047
Adult	55	62.7		51.7
Location
Midline	152	50.2	0.219	43.7	0.228
Lateral	21	65.3		54.9
Involvementa
Yes	63	43.3	0.002	35.2	0.001
No	84	63.8		55.2
Unknown	26
Tumor Size
<3 cm	110	56.8	0.314	47.7	0.444
≥3 cm	37	44.2		41.8
Unknown	26
Extent of resection
Gross total	114	60.9	0.002	53.9	<0.001
Subtotal	52	42.7		33.0
Unknown	7
CSF Shunting
Yes	53	45.8	0.074	41.1	0.055
No	103	56.0		47.5
Unknown	17
RTb
Yes	139	58.4	<0.001	49.3	<0.001
No	34	8.0		8.0
CHTc
Yes	98	62.1	<0.001	51.2	0.001
No	75	38.9		38.9
Institution
A	153	53.3	0.184	46.9	0.238
B	20	40.0		40.0

^ainvolving brain stem or IV ventricle floor by the tumor.

^bindicating postoperative primary radiation therapy.

^cindicating postoperative primary chemotherapy.

Institution A =  Huashan Hospital.

Institution B = Southwest Hospital.