In the regression models, we examined the influence of the following variables on binge eating levels: 1) 5-HT2a T102C genotype/allele variables and 5-HTTLPR genotype/allele variables; 2) dietary restraint and impulsivity; 3) the two-way interactions among genotype and dietary restraint or genotype and impulsivity, and 4) the three-way interaction among genotype, impulsivity, and dietary restraint. The equation for these analyses is as follows:
