Table 3.

Univariate analysis for the STR/biopsy only subgroup.

Factors	PFS			OS
	Whole cohort	Grade III	Grade IV	Whole cohort	Grade III	Grade IV
	p-value	p-value	p-value	p-value	p-value	p-value
Grade IV vs. grade III	0.041	NA	NA	0.011	NA	NA
Concurrent CRT (yes vs. no)	0.851	0.617	0.470	0.769	0.940	0.697
CT after RT/CRT (yes vs. no)	0.006	0.545	0.257	0.001	0.162	0.980
Temozolomide (yes vs. no)	0.080	0.066	0.828	0.354	0.350	0.541
Concurrent and adjuvant CT (yes vs. no)	0.205	0.375	0.795	0.286	0.473	0.507
RT dose (≥59.4 vs. <59.4 Gy)	0.598	0.967	0.018	0.203	0.421	0.027

NA, not applicable; CT, chemotherapy; RT, radiation therapy; CRT, chemoradiation.

Bold indicates significant value (p ≤ 0.05).