Table 1. Clinical characteristics of patients.

Characteristics	Total	Progression group	Non-progression group	P value
No. of patients	33	18	15
Age (years, mean ± SD)	53.9 ± 13.75	55.3 ± 12.36	52.27 ± 15.52	0.371
Karnofsky performance score				0.489
<70	2 (6%)	2 (11%)	0 (0%)
≥70	31 (94%)	16 (89%)	15 (100%)
Radiation dose (Gy)	59.2 ± 4.97	59.6 ± 4.45	58.7 ± 5.61	0.361
Methylation status of MGMT promoter				0.313
Negative	13 (39.4%)	9 (50%)	4 (30.8%)
Positive	20 (60.6%)	9 (50%)	11 (73.3%)
Pseudoprogression				0.674
Negative	26 (78.8%)	15 (83.3%)	11 (73.3%)
Positive	7 (21.2%)	3 (16.7%)	4 (26.7%)