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Table 1: Study group and tumor characteristics
Sample Characteristics Patients (n = 69) Healthy Controls (n = 31)
Sex 
 Male 45 18
 Female 24 13
Age (yr) 
 Mean 48.74 [SD, 14.32] 49.68 [SD, 15.54]
 Range 19–77 22–68
Handedness^{^a} 
 Right 61 29
 Left 8 2
Glioma location^{^b} 
 Anterior 53 
 Posterior 16 
Glioma hemisphere 
 Left 41 
 Right 28 
Glioma grade (WHO classification)
 Grade II 25 
 Grade III 17 
 Grade IV 27 
Antiepileptics (yes/no) 55/14 
Steroids (yes/no) 33/36 
Note:—WHO indicates World Health Organization.
↵a Handedness was determined by the Edinburgh Handedness Inventory.
↵b “Anterior” tumors are located in the frontal or anterior temporal lobes. “Posterior” tumors are located in the parietal or posterior temporal lobes, as classified by radiology report review.

Sample Characteristics	Patients (n = 69)	Healthy Controls (n = 31)
Sex
Male	45	18
Female	24	13
Age (yr)
Mean	48.74 [SD, 14.32]	49.68 [SD, 15.54]
Range	19–77	22–68
Handedness^{^a}
Right	61	29
Left	8	2
Glioma location^{^b}
Anterior	53
Posterior	16
Glioma hemisphere
Left	41
Right	28
Glioma grade (WHO classification)
Grade II	25
Grade III	17
Grade IV	27
Antiepileptics (yes/no)	55/14
Steroids (yes/no)	33/36