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Data from several national studies indicate that drinking and academic impairment are associated (Engs et al. , 1996; Perkins, 1992; Presley et al. , 1996a,b; Wechsler et al. , 1994, 1998, 2000b). In addition to students’ own perceptions that alcohol use has produced academic impairment, several studies have revealed a consistent association between lower self-reported grade averages and higher levels of alcohol consumption.
Also, a twenty-year twin study from Finland has shown that moderate alcohol consumption may reduce the risk of type 2 diabetes in men and women. However, binge drinking and high alcohol consumption was found to increase the risk of type 2 diabetes in women.  A study in mice has suggested a beneficial effect of alcohol in promoting insulin sensitivity.
There were significant disparities in the level of consumption across countries among different types of alcoholic beverages. For example, although most of the leading consumers of alcoholic beverages drank significant quantities of wine, many drank relatively low quantities of distilled spirits. The leading beer-drinking countries were the Czech Republic, Ireland, Germany, Austria, and Luxembourg. Russia, Latvia, Cyprus, the Czech Republic, and Japan were among the leading consumers of distilled spirits. Ireland and Russia had the highest rates of heavy alcohol consumption.
Both environmental and genetic factors are thought to contribute, but there is often a lack of discrimination between alcohol consumption in dependent and nondependent individuals. There is no clear reason to assume that the same genetic factors are responsible. In fact, say the team, “one can interpret some of the data collected with mice to show a dissociation between a propensity for high alcohol consumption.