To control for the effect of age, in our study participants with PTSD were subdivided into different age groups (age range 38–51, 52–65, and 66–77 years), and their plasma HDL and triglyceride levels (that were significantly affected by age in the hierarchical regression analysis) did not differ between BDNF Val66Met A vs. GG genotype carriers and between BDNF C270T T vs. CC genotype carriers. This evidence concerns the gene BDNF and post-traumatic stress disorder.