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Table 1: Demographic and clinical characteristics of patients and controls
Characteristic Patients with Brain Tumor (n = 66) Control Subjects (n = 21)
Age (range) (mean) (yr) 18–75 (40.8 ± 14.6) 25–61 (31.8 ± 9.24)
Sex (No.) 
    Male 38 11
    Female 28 10
Tumor size (mean) (mm³) 8.4 × 10² to 1.6 × 10⁵ (4.3 × 10⁴ ± 3.7 × 10⁴) –
Pathology (No.) –
    Diffuse astrocytoma 6 
    Fibrillary astrocytoma 1 
    Infiltrative astrocytoma 9 
    Anaplastic astrocytoma 8 
    Glioblastoma 8 
    Oligodendroglioma 26 
    Anaplastic oligoastrocytoma 3 
    Myeloid sarcoma 1 
    Metastatic melanoma 1 
    Metastatic adenocarcinoma 1 
    No pathologic report (low-grade tumor by imaging) 2 
WHO classification (No.) 
    Grade I 0 
    Grade II 33 
    Grade III 20 
    Grade IV 8 
Tumor location (No.) 
    Right hemisphere 18 
        Frontal 12 (3 SMA, 1 PMC) 
        Parietal 1 
        Temporal 1 
        Insular 2 
        Frontoparietal 1 
        Frontotemporal 1 
    Left hemisphere 46 
        Frontal 24 (4 SMA, 2 PMC) 
        Parietal 3 
        Temporal 11 
        Insular 4 
        Frontoparietal 2 
        Frontotemporal 1 
        Parietotemporal 1 
    Bilateral hemisphere 1 
        Multiple lesions 1 
Note:—PMC indicates primary motor cortex.