Except for legal problems, which was rare, the prevalence of all DSM-IV criteria and craving was high (Table 1) ranging from 27% to 52% for alcohol, 12% to 29% for cannabis, 29% to 73% for cocaine, and 30% to 73% for heroin. Hazardous use, while endorsed commonly across substances (27-30%), was among the low-prevalence criteria. The prevalence of craving was similar in magnitude to DSM-IV dependence criteria. Except for cannabis, the total number of criteria per patient for each substance was distributed bi-modally: one mode with no criteria and the other mode at 9 or more criteria (Fig. 1).
