AUD-GR scores (based on parent and co-twin AD) ranged from 0-8 (M=1.16, SD=1.41). The majority of the parents were within sub-threshold ranges of CD criteria (range=0-7, M=0.65, SD=0.99), with 1.7% of the parents (2.7% of fathers, 0.93% of mothers) meeting the criteria for a CD diagnosis. Twins’ CD criterion sum scores ranged from 0-8 (M=1.08, SD= 1.26), with 12.3% meeting CD diagnosis criteria. The majority of the twins’ parents were within normative sub-threshold ranges of ASB (Range=0-6, M=1.12, SD=1.18), with <1% (n=26, 21 men) of the parents meeting the criteria for the adult portion of the ASPD diagnosis (ASB). There was no significant relationship between parents’ ASB symptom counts. Twins’ ASB sum scores ranged from 0-6 (M= 0.63, SD= 0.96), with 2.6% meeting criteria for the adult ASPD diagnosis. EXT-GR (based on parent and co-twin CD and ASB) scores ranged from 0-7 (M=0.87, SD=1.27).