In the severe vs. low anxiety comparison, Bayesian odds ratio estimation showed firm credible intervals for the ss vs. ll (ORBayesian = 1.31–1.39) effects, in the total population (Fig. 2). Results indicate a remarkable difference between the younger (≤30 years) and the elder (>30) subpopulations (supporting traditional PLINK results). In the elder subpopulation the effect of the ss compared to ll genotype of 5-HTTLPR is modest (ORBayesian = 1.13–1.19), in the younger subpopulation, however, the effect is strong with a firm credible interval ORBayesian = 1.55–1.82 (Fig. 2).
