There were no significant group differences in COMT Val158Met alleles and genotype frequencies between patients and controls, for all EDs pooled together [range of odds ratios (ORs): 0.96-1.04, p-values: 0.46-0.97, I<sup>2</sup> = 0%] and when analysing separately patients with AN (ORs: 0.94-1.04, p-values: 0.31-0.61, I<sup>2</sup> = 0%) or BN (ORs: 0.80-1.09, p-values: 0.28-0.64, I<sup>2</sup> = 0-44%).
We explored the influence of interactions between polymorphisms acting upon postsynaptic receptors (DRD2 TaqA1 rs1800497 and DRD4 7R) and dopamine regulators (COMT rs4680 and DAT1) on the expression of eating symptoms and personality traits in women with bulimia-spectrum eating disorders.