In the Past PTSD > 5 y group, three significant correlations emerge: SUMO1 with LIP (ρ = −0.41, p = 0.023), CX3CL1 with LIP (ρ = −0.40, p = 0.026), and CX3CL1 with DIV (0.41, p = 0.021), which demonstrate that elevated SUMO1 and CX3CL1 levels are associated with decreased interest/pleasure, while CX3CL1 correlates positively with diurnal variation in chronic PTSD. The gene discussed is CX3CL1; the disease is post-traumatic stress disorder.