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. Author manuscript; available in PMC: 2015 May 31.
Published in final edited form as: World Neurosurg. 2014 Aug 1;83(3):261–268. doi: 10.1016/j.wneu.2014.07.043

Table 4.

Patient characteristic comparison among three biopsy groups

Patient Characteristic Frame-based Frameless IoMRI
Age (mean +/− SEM) 54.4 +/− 1.9 60.6 +/− 1.4 50.7 +/− 1.7
Gender (% male) 64.5% 52.6% 50.4%
Nonenhancing lesion 8.2% 7.1% 24.8%
Prior brain radiation 4.8% 4.4% 22.3%
Prior brain surgeries 12.7% 11.5% 33.0%