Table 1 presents the demography and substance use characteristics for the 114 followed participants divided into high and low LR groups at baseline. At study entry, the LR groups were similar on demography and most alcohol use characteristics. Regarding baseline alcohol problems, while no person met criteria for alcohol dependence, 40% ever experienced alcohol-related blackouts, 6% needed more alcohol to experience effects (tolerance), and ~3% each ever consumed more drinks than intended, missed social occasions because of drinking, and/or had alcohol interfere with school or work. During the follow-up, both lower and higher LR subjects increased drinking frequencies, maximum quantities, and alcohol problems. Regarding problems during the follow-up, 70% had 1+ blackouts, 45% drank more than intended, ~25% each spent more time drinking than planned or drank before noon, and ~15% each reported tolerance, noted that alcohol had interfered with work/school, or that they ever skipped important activities in order to drink.
