Another aim of the ABCD Study is to examine factors that impact the risk for and trajectory of SUD symptoms and consequences; other workgroups will be measuring the numerous outcomes that may represent substance use consequences (i.e., cognitive, brain structure and function, physical health, psychosocial functioning, and psychopathology). Therefore, the ABCD Substance Use module will also obtain SUD diagnosis and symptoms for alcohol, cannabis, nicotine and other drugs. Several studies have reported that adolescent alcohol exposure is associated with increased lifetime risk for developing an alcohol use disorder (AUD) (DeWit et al., 2000; Winters and Lee, 2008; Grant and Dawson, 1997; Hingson et al., 2006; McGue et al., 2001; Dawson et al., 2008; Robins and Przybeck, 1985). Earlier age of cannabis use has also been associated with increased risk for developing a cannabis use disorder (CUD); 11.5% of adults who reported having tried cannabis prior to age 14 met DSM-5 criteria for CUD as compared to only 2.6% of those who tried cannabis after age 18 (SAMHSA, 2013). The peak risk of developing a nicotine use disorder (NUD) is associated
