Alcohol and Older Drivers’ Crashes

NHTSA · 2014 · ROSA P / United States. National Highway Traffic Safety Administration

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Summary

This study addresses gaps in research regarding the role of alcohol in crashes involving older drivers. While previous findings suggest alcohol is less frequently a factor for older drivers compared to younger ones, this research specifically investigated the prevalence of alcohol among older drivers admitted to trauma centers, their average blood alcohol concentrations (BACs), and comparisons of their driving records and crash culpability against those with negative BACs. The study also compared BAC levels of older crash-involved drivers to younger drivers and older patients injured in falls. The methodology utilized data from the Oregon Trauma Registry covering the years 2000 through 2010. The initial sample included 83,841 individuals aged 18 and older, with 15,900 (19%) being 65 or older. The analysis focused on 660 drivers aged 65 and older, comprising 442 drivers with recorded BACs injured in crashes and a random sample of 218 drivers whose BACs were not recorded. Researchers documented injury circumstances and BACs, and obtained driving records and police crash reports from the Oregon Department of Motor Vehicles to assess prior convictions, suspensions, and crash responsibility. The results indicated that 10.1% of drivers aged 65 and older injured in crashes had positive BACs (≥.020 g/dL), a rate lower than the 13.3% observed in older patients injured in falls. Among those with positive BACs, the mean BAC for crash-involved drivers was .185 g/dL, which was higher than that of 18- to 20-year-old drivers but lower than middle-aged drivers. Notably, most older drivers testing positive had BACs above .160 g/dL, exceeding the legal limit. Drivers with positive BACs exhibited significantly worse driving histories: 62.1% had at least one conviction compared to 36.8% of those with negative BACs, and 53% had at least one license suspension compared to 26.4% of the negative group. Furthermore, 96% of drivers with positive BACs were deemed responsible for their crashes, compared to 78% of those with negative BACs. The study concludes that while older drivers are less likely than younger counterparts to test positive for alcohol after crashes, those who do test positive typically have high BACs well above the legal limit. The strong correlation between positive BACs, poor prior driving records, and high crash responsibility suggests that alcohol is a significant factor in older drivers' crashes, extending beyond the effects of aging alone. These findings highlight the need for increased attention on countermeasures for drinking and driving among individuals aged 65 and older.

Key finding

Among crash-involved drivers 65 and older, 10.1% had positive BACs with a mean of .185, and those positive-BAC drivers were judged responsible for 96% of their crashes versus 78% of negative-BAC drivers.

Methodology

dataset

Sample size: 660

Provenance

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• alcohol

Information type

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• Empirical Findings: crash risk outcomes