The largest class (class 1, n = 217) was characterized by tolerance (18.4%), drinking more than intended (6.9%), neglecting responsibilities (5.1%) and hazardous use (3.7%). No one in this class met the diagnostic threshold for dependence. The second largest class (class 2, n = 114) endorsed primarily tolerance (81.6%) and drinking more than intended (74.6%) and 34.2% of these individuals met the criteria for dependence. The remaining 65.8% were “diagnostic orphans” who endorsed one (14%) or two (51.8%) dependence criteria. The smallest class (class 3, n = 30) endorsed all criteria with high probabilities (30% to 100%) and all met the threshold for a dependence diagnosis.
