Table 3.

Summary of the Spearman’s correlation analysis for numeric and continuous variables. The distribution of intraoperative eloquent spots was not normally distributed (Shapiro–Wilk test p < 0.001) and therefore a nonparametric test was chosen for the correlation analysis.

Variables		Age	Tumor Volume	Brain-Grid Voxels	Intratumoral Cortical	Intratumoral Subcortical	Peritumoral Cortical	Peritumoral Subcortical	Resection Grade
Age	Corr. Co	1	0.161	0.101	0.406 *	−0.161	−0.451 *	−0.089	−0.127
	p		0.349	0.557	0.014	0.399	0.006	0.605	0.462
Tumor volume	Corr. Co	0.161	1	0.689 *	0.17	0.094	−0.226	−0.511 *	−0.627 *
	p	0.349		0	0.32	0.587	0.184	0.001	0
Brain-Grid voxels	Corr. Co	0.101	0.689 *	1	0.012	0.155	−0.112	−0.326	−0.316
	p	0.557	0		0.944	0.366	0.517	0.052	0.06
Intratumoral eloquent spots cortical	Corr. Co	0.406 *	0.17	0.012	1	0.024	−0.366 *	−0.037	−0.411 *
	p	0.014	0.32	0.944		0.891	0.028	0.828	0.013
Intratumoral eloquent spots Subcortical	Corr. Co	−0.145	0.094	0.155	0.024	1	0.264	−0.281	−0.122
	p	0.399	0.587	0.366	0.891		0.119	0.097	0.477
Peritumoral eloquent spots cortical	Corr. Co	−0.451 *	−0.226	−0.112	−0.366 *	0.264	1	0.068	0.153
	p	0.006	0.184	0.517	0.028	0.119		0.695	0.372
Peritumoral eloquent spots subcortical	Corr. Co	−0.089	−0.511 *	−0.326	−0.037	−0.281	0.068	1	0.501 *
	p	0.605	0.001	0.052	0.828	0.097	0.695		0.002
Resection grade	Corr. Co	−0.127	−0.627 *	−0.316	−0.411 *	−0.122	0.153	0.501 *	1
	p	0.462	0	0.06	0.013	0.477	0.372	0.002

Corr. Co, correlation coefficient. * Correlation is significant with p value < 0.05.