For SUMO1, a protein involved in post-translational modification and stress response, the No PTSD group exhibits the highest median level at 34.63 ng/mL (IQR 26.26–41.76), followed by the Past PTSD > 5 y group at 11.40 ng/mL (IQR 6.67–19.59) and the Past PTSD ≤ 5 y group at 4.47 ng/mL (IQR 3.51–5.44). This evidence concerns the gene SUMO1 and post-traumatic stress disorder.