The PTSD factor score (β = 0.38, t = 4.03, p < 0.01), and, as a trend, the depression factor (β = 0.16, t = 1.79, p < 0.08), but not the PGD factor (β = 0.13, t = 1.50, p = 0.14) predicted unique variance in CPSS impairment scores. This evidence concerns the gene PGD and post-traumatic stress disorder.