Table 2

Results of the repeated-measures ANOVAs on FA and MD values of each tract

Tract	FA		MD

	F	p value^*	F	p value^*
Uncinate fasciculus
Main effect of group	F_1,66 = 0.130	0.72	F_1,67 = 3.037	0.09
Group × sex interaction	F_1,66 = 1.209	0.28	F_1,67 = 0.000	> 0.99
Hemisphere × group interaction	F_1,66 = 1.513	0.22	F_1,67 = 7.575	0.008
Hemisphere × group × sex interaction^†	F_1,66 = 0.789	0.38	F_1,67 = 0.297	0.59
Cingulum bundle
Main effect of group	F_1,68 = 0.521	0.47	F_1,67 = 0.269	0.61
Group × sex interaction	F_1,68 = 0.779	0.38	F_1,67 = 0.878	0.35
Hemisphere × group interaction	F_1,68 = 2.479	0.12	F_1,67 = 0.859	0.36
Hemisphere × group × sex interaction	F_1,69 = 0.327	0.57	F_1,67 = 2.802	0.10
Superior longitudinal fasciculus, parietal projections
Main effect of group	F_1,68 = 2.757	0.10	F_1,69 = 0.328	0.57
Group × sex interaction	F_1,68 = 0.090	0.77	F_1,69 = 0.037	0.85
Hemisphere × group interaction	F_1,68 = 0.620	0.43	F_1,69 = 0.598	0.44
Hemisphere × group × sex interaction	F_1,68 = 0.017	0.90	F_1,69 = 0.212	0.65
Superior longitudinal fasciculus, temporal projections
Main effect of group	F_1,69 = 2.668	0.11	F_1,69 = 1.133	0.29
Group × sex interaction	F_1,69 = 0.165	0.69	F_1,69 = 0.335	0.57
Hemisphere × group interaction	F_1,69 = 0.096	0.76	F_1,69 = 0.742	0.39
Hemisphere × group × sex interaction	F_1,69 = 0.948	0.33	F_1,69 = 0.000	> 0.99

ANOVA = analysis of variance; FA = fractional anisotropy; MD = mean diffusivity.
↵* Results were considered significant for main and interaction effects at p < 0.017.
↵† One-way ANOVA for each hemisphere with group (PTSD – control) and sex (male – female) as between-subject factors (left hemisphere: main effect of group F_1,65 = 0.359, p = 0.55; right hemisphere: main effect of group F_1,68 = 6.700, p = 0.012; direction: PTSD > controls. For the post hoc test of the group × hemisphere interaction effect, results were considered significant at p < 0.025.