CX3CL1, a chemokine involved in neuroinflammation, follows a similar pattern to MDA, with the highest median level observed in the Past PTSD ≤ 5 y group at 30.13 ng/mL (IQR 22.66–38.27), followed by the Past PTSD > 5 y group at 8.60 ng/mL (IQR 6.02–15.69) and the No PTSD group at 3.59 ng/mL (IQR 3.09–4.96). This evidence concerns the gene CX3CL1 and post-traumatic stress disorder.