Table 2.

Results of the whole brain cluster analysis of FA values (TBSS). ANCOVA includes comparison of all three experimental groups (patients with PTSD, TCs, HCs) and sex and age as covariates. Tracts were extracted according to the JHU white matter tractography atlas.

[Abbreviations: ATR – Anterior thalamic radiation; CST – Corticospinal tract; IFOF – Inferior fronto-occipital fasciculus; ILF – Inferior longitudinal fasciculus; L – Left; n.c. – not classified; R - Right; SLF – Superior longitudinal fasciculus].

Contrast	Cluster index	voxels	Significance	Peak voxel coordinate			Tracts
			p	x	y	z
ANCOVA	2	46	0.046	−27	−25	17	l CST
	1	24	0.045	−25	28	12	l IFOF
Post-Hoc T-test (TC > HC)	7	28,264	0.009	−24	28	10	l IFOF
	6	1,492	0.034	45	−22	−1	r ILF
	5	233	0.048	50	−46	0	r SLF
	4	34	0.05	−19	−31	36	l ATR
	3	22	0.05	36	−54	−8	r IFOF
	2	17	0.05	35	−49	8	r IFOF
	1	1	0.05	37	−51	−8	r IFOF
Post-Hoc T-test (TC > PTSD)	11	23,058	0.014	−27	−26	17	l CST
	10	305	0.046	31	−33	14	r IFOF
	9	116	0.049	35	−46	7	r IFOF
	8	109	0.049	39	−44	−11	r ILF
	7	85	0.049	47	−25	4	r ILF
	6	30	0.049	32	−44	−15	n.c.
	5	22	0.05	40	−39	−11	r ILF
	4	19	0.05	57	−18	3	r ILF
	3	15	0.05	37	−38	15	r SLF
	2	2	0.05	40	−53	1	r ILF
	1	1	0.05	27	−40	−18	n.c.