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The Long Beach/Fort Lauderdale relative risk study
Richard D Blomberg1, Raymond C Peck, Herbert Moskowitz
1Dunlap and Associates, Inc., Stamford, CT 06906-2300, USA. rdblomberg@aol.com
Journal of Safety Research
|September 26, 2009
Summary
This study found that driving with a blood alcohol content (BAC) of .04-.05 significantly increases crash risk. Risk becomes very pronounced above .10, supporting stricter impaired driving laws.
Area of Science:
- Traffic Safety Research
- Epidemiology
- Alcohol Impairment Studies
Background:
- Alcohol consumption is a known contributor to traffic crashes.
- The exact relationship between blood alcohol content (BAC) and crash risk remains debated.
- Understanding precise risk thresholds is crucial for effective legislation.
Purpose of the Study:
- To precisely define the relative risk function associated with Blood Alcohol Content (BAC) in traffic crashes.
- To identify the specific BAC levels at which crash risk begins to increase significantly.
- To provide evidence-based recommendations for traffic safety policies.
Main Methods:
- A case-control study design was employed in Long Beach, California, and Fort Lauderdale, Florida.
- Data included 2,871 traffic crashes and a matched control group of 14,985 drivers.
- Valid Blood Alcohol Content (BAC) specimens were obtained from a high percentage of both crash-involved drivers and controls.
Main Results:
- Adjusted analyses revealed increased relative crash risk starting at BACs of .04-.05.
- A pronounced elevation in crash risk was observed when BACs exceeded .10.
- The findings demonstrate a clear dose-response relationship between BAC and crash risk.
Conclusions:
- The study strongly supports the implementation and enforcement of .08 per se laws.
- Results advocate for increased sanctions for drivers with BACs exceeding .15.
- This research refines our understanding of alcohol's detrimental effects on driving performance.
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