The Past PTSD ≤ 5y group shows a similar pattern of strong biomarker inter-correlations (e.g., IL-18 with pERK: ρ = 0.771, adjusted p = 0.006), but the correlations with CECS scores are minimal, with the highest being IRE1 with CECS Anger (ρ = −0.25), indicating a slight tendency for higher IRE1 levels to be associated with less anger suppression. This evidence concerns the gene ERN1 and post-traumatic stress disorder.