Table 5.

Brain regions with GMVs smaller in ASD and associated with RRB symptoms

Region	Right/left	Peak coordinate (MNI)			ASD vs TD	Association with RRB symptoms (RRB = 0 vs RRB ≥ 1)
		X	Y	Z	t-value	t-value	p-value
Dataset collected at University of Utah
Amygdala	Right	30	−2	−20	4.7	0.64	0.53
ACC	Right	8	44	8	4.6	−0.84	0.41
Anterior insula	Right	36	22	0	4.2	0.75	0.46
pSPL	Right	32	−54	50	4.6	2.7	0.014
Dataset collected at ETH Zürich
Hippocampus	Right	26	−4	−22	4.2	0.39	0.71
Anterior insula	Right	36	14	−10	3.9	0.83	0.43
pSPL	Right	30	−52	58	4.1	2.8	0.022

t-values and p-values in “RRB = 0 vs RRB ≥ 1” indicate results of two-sample t test of GMVs between the ASD individuals with zero RRB scores and those with ≥1 RRB scores. Positive t-values denote that the GMVs were larger in individuals with zero RRB, whereas the negative values indicate that the GMVs were smaller.