When we evaluated the possible association between the ROCF copy, immediate and delayed recall test scores and BDNF rs56164415 in all veterans with PTSD, no significant differences were found in the ROCF copy test scores between veterans subdivided into genotypes (H = 1.036; df = 2; p = 0.596), T vs. CC carriers (U = 2376.0; p = 0.478) and allele carriers (U = 6217.0; p = 0.310). Here, BDNF is linked to post-traumatic stress disorder.