between 1991–1992 and 2001–2002 among blacks (0.8% vs. 1.8%) and Hispanics (0.6% vs. 1.2%), but there was little change among whites (1.3% vs. 1.4%). While the reasons for the rise in CUD among minority groups are unclear, the increase in cannabis potency, changes in perceived risk of CU, as well as environmental and socioeconomic factors (e.g., deleterious effects of acculturation on drug use, lower education) may contribute to CUD; Compton et al., 2004; Sinclair et al., 2013).
