By ethnicity, DSM-IV prevalence of past-year and lifetime cannabis use disorder in NESARC-I were highest in Native Americans (3.4%, 15.4%), followed by Blacks (1.8%, 7.4%), Whites (1.4%, 9.3%), Hispanics (1.2%, 5.5%), and Asians (1%, 2.8%, respectively), with significant differences between Native Americans and Whites29,43. Between NESARC-I in 2001–2002 and NESARC-III in 2012–2013, DSM-IV past-year cannabis use disorders increased in most ethnic groups across the decades, but increases were only significant for Blacks and Hispanics41. Rates of past-year use disorders in NESARC-III were in similar rank order as in NESARC-I for Native Americans (5.5%), Blacks (4.6%), Hispanics (2.8%), Whites (2.7%), and Asians (1.3%). However, within past-year users, past-year cannabis use disorder was 35.8% in Black, 33.3% in Hispanic, 31.9% in Native American, 28.9% in White, and in 26.0% Asian users41. In the 2005–2011 NSDUH surveys (N = 394,400), Native Americans had the highest prevalence of past-year cannabis use disorders (3.7%), followed by Black (2.5%), Hispanic (1.8%), White (1.5%), Native Hawaiian/Pacific Islander (1.3%), and Asians (0.8%)44. In the 2008 NSDUH sample, among past-year adult marijuana users (n = 6,917), Hispanics (13.4%) and
