Table 2. Reduced connectivity in depressive patients with suicidal ideation found using the NBS analysis compared with depressive patients without ideation.

Edges	t-statisticsa	Mean edge strength		Correlation coefficients in MDD with suicidal ideationb
		Suicidal ideation	No suicidal ideation	SSI	BIS motor	BIS attention-cognitive	BIS non-planning
Left rostral middle frontalc and left pallidumc	3.01	5.04	40.68	−0.24	−0.08	−0.28	−0.27
Left rostral middle frontalc and left lateral occipital	2.52	0.54	5.32	0.23	−0.13	0.27	0.27
Left rostral middle frontalc and left pars orbitalis	2.44	50.67	98.40	0.40	0.73d	0.20	0.21
Left superior parietalc and left thalamus	3.21	14.08	58.52	0.25	0.21	0.02	0.17
Left superior parietalc and left putamen	2.94	81.25	162.76	−0.15	−0.04	−0.22	−0.10
Left superior parietalc and left pallidumc	2.25	17.00	41.60	−0.44	−0.39	−0.26	−0.42
Left pars triangularis and left putamen	2.37	27.75	78.16	−0.27	−0.56d	0.13	−0.19
Left frontal pole and left caudate	2.37	10.50	43.12	−0.18	0.00	−0.29	−0.21
Left frontal pole and left pallidumc	2.34	0	3.92	NA	NA	NA	NA

Abbreviations: BIS, Barrett Impulsiveness Scale; FDR, false discovery rate; MDD, major depressive disorder; NA, not available; NBS, network-based statistics; SSI, Scale for Suicide Ideation.

^aStudent's t-statistic from two-sample t-test, (MDD_without−MDD_with).

^bCorrelation coefficients between edge weights and SSI/BIS scores in MDD with suicidal ideation.

^cHub nodes.

^dBold, significant after FDR correction over nine edges.