• A M Dellinger, J Bolen, and J J Sacks.
• National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA.
• Am J Prev Med. 1999 May 1; 16 (4): 283-8.

IntroductionPersons who drive after drinking or ride with drinking drivers are at increased risk of motor vehicle crash. Although alcohol is involved in 40% of fatal motor vehicle crashes yearly, there exist few systems to monitor alcohol-impaired driving. In this study we compare driver- and passenger-based estimates of the prevalence of alcohol-impaired driving.DesignA random-digit-dialing telephone survey of the United States. Participants were adults aged 18 or older who were English- or Spanish-speaking from 5238 households (response rate = 56.1%).ResultsFrom the 4603 respondents who reported driving in the preceding 30 days, we estimate that there were 126 million drinking-driving episodes in the United States in 1994. From the 4380 passengers in the preceding 30 days, we estimate 191 million episodes. Three percent of respondents self-reported as drinking drivers (4.8% of males and 1.3% of females) and 4.9% as passengers of drinking drivers. Drinking drivers were more likely to be passengers of drinking drivers (44% versus 4% of nondrinking drivers). Drinking drivers were also more than twice as likely to report drinking daily, and only one half as likely to report always wearing their safety belts.ConclusionPassengers who report riding with a drinking driver may provide an important estimate of the prevalence of drinking driving. Passengers of drinking drivers represent a high-risk group that is not considered in most prevention efforts. Because being a passenger of a drinking driver is not illegal, it may be an easier topic for clinicians to broach than drinking and driving.

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