Table 2.

Description of surgeon group 1 data

	2D (n = 58)	3DUS (n = 156)	p-value
	Mean (SD)
Age (in years)	43.79 (16.64)	41.42 (13.77)	0.43
Gender
Male	39	114
Female	19	42	0.4
Prior treatment
Yes	17	27
No	41	129	0.05
Eloquent location
Yes	25	79
No	33	77	0.32
Depth of tumor
Surfacing	26	88
Sub-cortical	18	36	0.18
Deep	14	32
Histology
Low grade	12	34
High grade	46	122	0.86
Glioma location
Lobar	54	153
No-Lobar	4	3	0.07
Delineation
Poor	3	16
Moderate	32	80	0.59
Good	23	60
Contrast enhancement pattern
Negligible	12	63
Mixed	36	54	0.22
Predominant	10	39

p-values are corresponding to Mann–Whitney test