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Table 1 Study population criteria

From: The role of intraoperative ultrasound in gross total resection of brain mass lesions and outcome

ParametersIOUS groupConventional groupp
N%N%
Number (N)33253300470.1
Age
 ≤ 18y84257625 
 > 18y2487522475 
 Range3 months to 70 years 1–70 years  
 Mean47 years 46 years 0.9
Sex
 Male21565198660.8
 Female11735102340.8
Pathology
 Tumors23872208690.3
 Hematoma561765220.1
 Abscess38112790.4
Tumor types238 208  
 Glioma15465147710.1
 Metastatic42181570.03
 Medulloblastoma22928130.07
 Others2081890.6
Location to tentorium cerebelli
 Supratentorial2457422274 
 Infratentorial87267826 
Location to cortex
 Cortical, and subcortical9629100330.3
 Subcortical23671200670.3
Maximal diameter
 ≤ 5 cm2056218762 
 > 5 cm1273811338 
  1. IOUS intraoperative ultrasound