It appears that the prevalences of externalizing diagnoses may differ depending on the population sampled. Rates of ASPD in the Epidemiologic Catchment Area (ECA) Study (Regier et al, 1990) (2.6%) were lower than the National Co-morbidity Survey (NCS) (3.5%) (Agosti et al., 2002; Kessler et al., 1994). In the national epidemiologic survey on alcohol and related conditions (NESARC) the lifetime prevalences of ASPD, and CD were 1.1% and 3.6%, respectively (Compton et al., 2005). In that survey they found that Native Americans were more likely to have ASPD than any other ethnic group.
