Table 1.

Participant characteristics and follow-up periods

	IDHT1 Mutant (n = 10)	IDH1 Wild-type (n = 29)
Surgical resection
Biopsy	1 (10%)	3 (10%)
Gross total	6 (60%)	18 (62%)
Subtotal	3 (30%)	8 (28%)
Diagnosed time	11/2004–04/2011	08/2006–10/2011
Age in years (range)	48.5 (31–61)	57 (23–78)
Days from surgery to RT	37 days	31 days
Number of scans	2.8	3.3
Number of days followed up (range)	151.7 days (92–184)	143.7 days (51–192)
Preoperative volume
VT1+C	8.8 ± 3.4 cc	20.0 ± 3.0 cc
VFLAIR	78.9 ± 21.9 cc	99.5 ± 11.5 cc
MGMT methylation status
Methylated	5 (50%)	12 (41%)
Unmethylated	3 (30%)	15 (52%)
No result	2 (20%)	2 (7%)