Descriptive statistics and bivariate comparisons of participants with and without lifetime PTSD and effect of SLC6A3 3′UTR VNTR polymorphism on risk of lifetime PTSD in the full analytic sample* (n = 320).

SES: socio-economic status; PTEs: potential traumatic events; UTR: untranslated region; VNTR: variable number tandem repeat.*Full analytic sample includes 320 participants who were trauma exposed and had SLC6A3 3′-UTR VNTR polymorphism of either 9R/9R, 9R/10R, or 10R/10R genotypes.**Variables are presented by mean and standard deviation.