dichotomized SOB and gender and then secondarily include DRD2 and DRD4. Direct SOB effects and SOB interactions with genotypes are the main focus of the study. Since this study is only concerned with sexual dimorphism in so far as it moderates SOB or genotype associations, main effects of gender are not commented on. All scales used in this study were previously examined in relation to the genetic polymorphisms and gender [53], [54] and these results are not reported on here unless the inclusion of SOB in statistical models reveals new results.
