Table 2.

The binarized degree centrality differences between PIs and GSs.

Conditions	Brain regions of peak coordinates	R/L	BA	Voxel volume (mm3)	t-score of peak voxel	MNI coordinates
						X, Y, Z
PIs>GSs	Occipital Lobe, Cerebellum Posterior Lobe	R	19	1350	3.4987	33 −72 −18
PIs<GSs	Middle Temporal Gyrus	L	20	945	−4.6669	−54 −42 −15
PIs<GSs	Middle Temporal Gyrus	R	22	864	−3.9199	54 −15 −6
PIs<GSs	Insula	L	13	999	−3.5931	−36 0 −3
PIs<GSs	Insula	R	13	2079	−3.6379	36 3 −12
PIs<GSs	Superior Frontal Gyrus	L	10	1188	−4.1077	−18 54 12

Notes: Between-group differences in binarized degree centrality thresholded at r=0.25. The statistical threshold was set at uncorrected voxel threshold of p<0.01 with a minimum voxel volume threshold of 810 mm³.

Abbreviations: PIs, patients with primary insomnia; GSs, good sleepers; R, right; L, left; BA, Brodmann’s area; MNI, montreal neurological institute.