Table 2 Results of statistical models with a significant overall effect of group (SI+, SI−, CTL) on network coherence with planned linear contrast tests (SI+ versus SI− and SI+ versus CTL).

Model	Statistic	p (corrected)	p (uncorrected or posthoc)	B±SE	Δ R²
DMN-A Coherence
Group	F(2,63) = 3.674	0.067	0.031*		0.104
SI+ versus SI−	t(63) = −1.089		0.280	−0.180 ± 0.165
SI+ versus CTL	t(63) = −2.710		0.009**	−0.505 ± 0.186
DMN-P Coherence
Group	F(2,63) = 3.440	0.067	0.038*		0.098
SI+ versus SI−	t(63) = −0.413		0.681	−0.096 ± 0.233
SI+ versus CTL	t(63) = −2.519		0.014*	−0.661 ± 0.263
SI− versus CTL	t(63) = −2.121		0.038*	−0.565 ± 0.267
DMN-V Coherence
Group	F(2,63) = 3.479	0.067	0.037*		0.099
SI+ versus SI−	t(63) = −2.064		0.043*	−0.393 ± 0.190
SI+ versus CTL	t(63) = −2.365		0.021*	−0.507 ± 0.214
SN-Ins Coherence
Group	F(2,63) = 4.035	0.067	0.022*		0.114
SI+ versus SI−	t(63) = −0.926		0.358	−0.219 ± 0.236
SI+ versus CTL	t(63) = −2.824		0.006**	−0.753 ± 0.267

Posthoc linear contrast tests (SI− versus CTL), motion, and medication use as covariates (see Table S1 for more details). See Fig. 2 for more details. FDR-corrected p-values are reported for the main effect of group only.
SI suicidal ideation, CTL healthy control, DMN-A Anterior Default Mode Network, DMN-P Posterior Default Mode Network, DMN-V Ventral Default Mode Network, SN-Ins Salience Network-Insula.
*p < 0.05, **p < 0.01.

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