Table 3.

Statistical peritumoral tissue comparisons between local patients with GBM and TCIA database as our validation cohort to carry out a pilot study.

	1. Local Patients with GBM		2. TCIA Database with GBM
Parameter	Mean ± SD (Min.–Max.)	95% Confidence Interval-Mean (Lower–Upper Bound)	Mean ± SD (Min.–Max.)	95% Confidence Interval-Mean (Lower–Upper Bound)
Necrosis/Peritumoral tissue	2.94 ± 1.42 (1.09–7.88)	2.33–3.56	2.20 ± 1.18 (0.50–4.32)	1.76–2.63
Solid/Peritumoral tissue	4.12 ± 2.03 (1.00–9.85)	3.25–5.00	5.16 ± 1.49 (1.57–9.17)	4.61–5.70 †
Edema/Peritumoral tissue	5.89 ± 4.34 (0.21–15.15)	4.01–7.76 *	4.25 ± 3.31 (0.21–11.55)	3.04–5.46 †

All differences were significant by repeated-measures analysis of variance with Bonferroni correction. Differences compared with necrosis/ peritumoral tissue ratio at p < 0.05 (*), p < 0.001 (†). Note: SD, standard deviation; Min, minimum; Max, maximum.