Table 3.

Multiple linear regression analysis between binarized degree centrality and behavioral performances in PIs.

Dependent variable	Independent variables	Coefficient (R2)	β	Standard error	t value	p value
Duration of insomnia	Left insula	0.139	2.804	1.028	2.727	0.009
SAS score	Left middle temporal gyrus	0.104	5.534	2.401	2.304	0.026

Abbreviations: PIs, patients with primary insomnia; SAS, Self-rating anxiety scale.