1. Patient Characteristics.

		RT + Chemotherapy	RT alone	Total
Age	<=40	291 (17%)	218 (17%)	509
	41‐59	914 (54%)	714 (55%)	1628
	>=60	474 (28%)	362 (27%)	836
	Unknown	19 (1%)	12 (1%)	31
Sex	Male	971 (57%)	776 (59%)	1747
	Female	709 (42%)	518 (40%)	1227
	Unknown	18 (1%)	12 (1%)	30
Histology	AA	400 (24%)	306 (24%)	706
	GBM	1062 (62%)	838 (64%)	1900
	Other	98 (6%)	80 (6%)	178
	Unknown	138 (8%)	82 (6%)	220
Performance Status	Good	636 (37%)	591 (45%)	1225
	Poor	560 (33%)	438 (34%)	998
	Unknown	504 (30%)	277 (21%)	781
Extent of Resection	Complete	432 (25%)	317 (24%)	749
	Incomplete	953 (56%)	723 (55%)	1676
	Biopsy	262 (16%)	231 (18%)	493
	Unknown	51 (3%)	35 (3%)	86