Reliability analysis using parametric models indicated that, among the independent variables, both maternal NR3C1 alone and the interaction effect of maternal NR3C1 and group remained significant in all models tested (Model 1: Group: β = −0.16, p = 0.14, Maternal NR3C1: β = 0.63, p < 0.001, interaction: β = −0.57, p = 0.043), while the variable PTSD-group by itself was no longer significant. This evidence concerns the gene NR3C1 and post-traumatic stress disorder.