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Table 2: Clinical characteristics of the patients
Characteristic True Progression (n = 24) Pseudoprogression (n = 18) P Value
Age (yr) 60.50 ± 11.58 48.22 ± 12.54 .002
Sex .347
    Male 17 10 
    Female 7 8 
Karnofsky performance score .371
    <70 4 1 
    ≥70 20 17 
Surgery .623
    Biopsy 3 1 
    Resection 21 17 
Radiation dose (Gy) 55.52 ± 8.17 57.83 ± 7.52 .376
Methylated MGMT promoter^{^a} 1.000
    Negative 6 5 
    Positive 15 13 
Note:—MGMT indicates O6-methylguanine DNA methyltransferase.
↵a The promoter methylation status of MGMT, which was investigated by using the methylation-specific polymerase chain reaction technique, was documented whenever available.

Characteristic	True Progression (n = 24)	Pseudoprogression (n = 18)	P Value
Age (yr)	60.50 ± 11.58	48.22 ± 12.54	.002
Sex			.347
Male	17	10
Female	7	8
Karnofsky performance score			.371
<70	4	1
≥70	20	17
Surgery			.623
Biopsy	3	1
Resection	21	17
Radiation dose (Gy)	55.52 ± 8.17	57.83 ± 7.52	.376
Methylated MGMT promoter^{^a}			1.000
Negative	6	5
Positive	15	13