In terms of annual prevalence, more than twice as many students drank as used tobacco, but daily use of tobacco was 17 times higher than daily use of alcohol. Table 4.6 summarizes the annual prevalence of the six most frequently used drugs, in order of use. These figures represent a more immediate and shorter-term picture of students' substance use patterns than the annual prevalence figures noted above, and accordingly the percentages are lower than the annual prevalence figures. Alcohol, tobacco, and marijuana were the most frequently used drugs, followed by amphetamines and hallucinogens, and then by cocaine. Consequences Table 4.8 lists the self-reported consequences of alcohol and other drug use during the last year.
Several findings are relevant to the academic environment.
By gender, 15.8 percent of the men believed that they had a substance abuse problem as compared to 7.9 percent of the women, and 17.5 percent of the men had been in trouble with police or other campus authorities compared to only 7.5 percent of the women. A substantial contrast exists between the 32.3 percent of students who had driven under the influence and the 1.5 percent who had been arrested for drunk driving. Alcohol Use and Academic Performance Table 4.9 describes the relationship between the average number of drinks consumed per week and grade average. As can be seen, the heaviest drinkers obtained the lowest grades. For many of the substances listed, use by graduate students is lower than use by undergraduates.