Table 1.

Patient characteristics by the ISRT values

Characteristics	ISRT1 (n = 156)		ISRT2 (n = 152)
	n	%	n	%
Gender
Male	82	52	90	59*
Female	74	48	62	41
Age (years)
40 or less	44	28	39	26
More than 40	112	72	113	74
Karnofsky status
60 or more	49	32	47	31
Less than 60	107	68	105	69
Resection
Total	47	30	47	31
Partial	109	70	105	69
Histology
Glioblastoma	94	60	94	62
Anaplastic astrocytoma	62	40	58	38
Tumour location
Frontal	50	32	56	37
Others	106	67	96	63

ISRT – interval from surgery to irradiation. ISRT1 ≤ 37 days, ISRT2 > 37 days.

^*There is some disparity between the patient characteristics with more males and relatively more frontal tumours in the ISRT2 group.