The U. S. Department of Justice 1988 study, Special Report: Drunk Driving, written and conducted by Lawrence A. Greenfeld of the Bureau of Justice Statistics (report NCJ-109945) concluded that:
-- Two percent of those arrested for drunken driving had been drinking wine only; 54 percent had been drinking beer only and 23 percent hard liquor only. Twenty-one percent reported drinking more than one type of alcoholic beverage. If those drinking more than one type of beverage consumed wine in the same proportions as those drinking only one type, this would increase wine's involvement in drunk driving by 0.5 percent (to a total of 2.5 percent).
-- Liquor drinkers arrested had a median blood alcohol concentration (BAC) of 0.25; beer drinkers had a BAC of 0.16 and wine drinkers 0.10. Drinkers of more than one type of beverage reported the highest mean BAC of 0.29. (The median is a number where half the data is higher and half is lower.)
-- Of those jailed for drunk driving, 95 percent were male, had a median age of 32 years old, had a racial composition that reflected society as a whole and were more likely to be unemployed and not living with a spouse at the time of arrest.