Prevalence of cannabis dependence also has been found to vary within Native American subgroups. Lifetime DSM-IV cannabis use disorder for Southwest (12.2% men, 4.5% women) and Northern Plains Indians (14.1% men, 9.4% women)46 were only significantly different for Southwest females. In another sample of 525 Southwest California Indians, 33% met DSM-III-R criteria for lifetime cannabis dependence47.
