For the GWAS of adult externalizing disorders, we used the participants who were 29 years of age and older at the time of their psychiatric interviews (Adult genome-wide association subsample; n = 1,249; 45% male; Mage = 44.97; SD = 12.56, range = 29-88). The age cutoff was selected because the oldest prospective participant's externalizing disorder data came from an age 28 psychiatric interview. As described in Wang et al. (2013), the sample was genotyped on the Illumina Human OmniExpress array 12.VI. In total, 587,378 SNPs with minor allele frequency > 5% and genotyping success rate per individual (> 75%) were analyzed.
