endorse using larger amounts or for longer than intended and failed quit attempts than their AA counterparts. In addition, tolerance, time spent using cannabis and the DSM-5 criteria of withdrawal and craving were more commonly reported by AA women than their EA counterparts – similar differences were not noted for men. The prevalence of DSM-IV cannabis abuse/dependence was higher in men compared with women, but no within-sex ethnic differences were noted. For DSM-5, cannabis use disorder was again more common in men than women, and there were no ethnic differences in men. Howeverr, AA women were more likely to meet criteria compared with their EA counterparts (31.8% versus 25.1%). Comparing the prevalence of DSM-IV versus DSM-5 cannabis use disorders - within each group, very modest changes were observed. Decrease in overall prevalence was noted for EA, while AA women showed a slight increase and AA men remained unchanged. Examining the [95%] confidence limits for the point estimates, only the decrease in prevalence in the EA was statistically significant (For men: 55.4% [47.9-54.1] vs. 51.1% [52.2-58.6]; for women: 28.1 [25.4-30.9] vs. 25.1% [22.6-27.9]) while the estimates in AA subjects could be equated across diagnostic classification scheme (For men: 52.6% [48.3-56.9] vs.
