Effect of pretreatment clinical factors on overall survival in glioblastoma multiforme: a Surveillance Epidemiology and End Results (SEER) population analysis

Table 2 Numbers of patients with GBM by radiation treatment groups, extent of surgery groups, and age groups

		Age Groups
		<50	> = 50	Total
Radiation Groups	Extent of Surgery Groups
Yes	Surgical Resection	3,838	14,216	18,054
	No Cancer Directed Resection	548	3,764	4,312
	Unknown	159	861	1,020
Yes Total		4,545	18,841	23,386
No	Surgical Resection	654	4,498	5,152
	No Cancer Directed Resection	297	3,788	4,085
	Unknown	92	845	937
No Total		1,043	9,131	10,174
Unknown	Surgical Resection	91	505	596
	No Cancer Directed Resection	19	195	214
	Unknown	34	260	294
Unknown Total		144	960	1,104
All Radiation Groups	Surgical Resection	4,583	19,219	23,802
	No Cancer Directed Resection	864	7,747	8,611
	Unknown	285	1,966	2,251
All Radiation Groups Total		5,732	28,932	34,664

ISSN: 1477-7819