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Table 1: Patient characteristics (n = 61)
Variables Mean (SD) or No. (%)
Age (year)^{^a} 63.0 (9.8)
Sex 
    Male 32 (52.5%)
    Female 29 (47.5%)
Karnofsky performance scale^{^a} 72.1 (12.1)
Enhancing tumor volume (cm³)^{^a} 23.5 (19.1)
Extent of resection 
    Total 28 (45.9%)
    Subtotal or partial 33 (54.1%)
Edema 
    None 9 (14.8%)
    Mild-to-moderate 15 (24.6%)
    Severe 37 (60.6%)
Non-contrast-enhancing tumor 
    Negative 26 (42.6%)
    Positive 35 (57.4%)
MGMT 
    Unmethylated 38 (62.3%)
    Methylated 23 (37.7%)
EGFR 
    0 10 (16.4%)
    1+ 3 (4.9%)
    2+ 15 (24.6%)
    3+ 33 (54.1%)
p53^{^a} 17.5 (28.0)
Ki-67^{^a} 23.4 (19.0)
↵a Indicates mean and SD in parentheses.

Variables	Mean (SD) or No. (%)
Age (year)^{^a}	63.0 (9.8)
Sex
Male	32 (52.5%)
Female	29 (47.5%)
Karnofsky performance scale^{^a}	72.1 (12.1)
Enhancing tumor volume (cm³)^{^a}	23.5 (19.1)
Extent of resection
Total	28 (45.9%)
Subtotal or partial	33 (54.1%)
Edema
None	9 (14.8%)
Mild-to-moderate	15 (24.6%)
Severe	37 (60.6%)
Non-contrast-enhancing tumor
Negative	26 (42.6%)
Positive	35 (57.4%)
MGMT
Unmethylated	38 (62.3%)
Methylated	23 (37.7%)
EGFR
0	10 (16.4%)
1+	3 (4.9%)
2+	15 (24.6%)
3+	33 (54.1%)
p53^{^a}	17.5 (28.0)
Ki-67^{^a}	23.4 (19.0)