Table 1.

Demographics of medulloblastoma patients, brain benign disease patients, other brain malignant tumour patients and healthy controls.

Sample group		No. Males	No. Females	sum	Mean Age ± SD
Discovery group	Medulloblastoma	44	30	74	7.67 ± 3.34
	Healthy control	43	33	76	7.76 ± 2.06
	Brain malignant tumor patients	10	10	20	7.03 ± 4.27
	Brain benign disease patients	24	10	34	7.17 ± 3.81
Validation group	Medulloblastoma	22	15	37	7.37 ± 3.37
	Healthy control	24	18	42	7.78 ± 2.31
	Brain malignant tumor patients	6	5	11	8.1 ± 3.49
	Brain benign disease patients	13	4	17	7.17 ± 3.51
postsurgical validation	MB patients of a week after surgery	13	16	29	7.50 ± 3.27
	MB patients of a month after surgery	51	29	80	7.67 ± 3.34
sum		250	170	420