 |
|
The Impact of a Vision Screening Law on Older Driver Fatality Rates
Gerald McGwin Jr, MS, PhD;
Scott A. Sarrels, BS;
Russell Griffin, MPH;
Cynthia Owsley, PhD, MSPH;
Loring W. Rue III, MD
Arch Ophthalmol. 2008;126(11):1544-1547.
Objective To evaluate the impact of the Florida visual acuity licensing standard for drivers 80 years and older on fatal motor vehicle collision (MVC) involvement.
Methods Motor vehicle collision fatality rates for all Florida residents and for drivers 80 years and older were compared before and after the visual acuity licensing standard was implemented in January 2004.
Results From 2001 to 2006, there was a nonsignificant (P = .06) increase in MVC fatality rates in Florida; in contrast, fatality rates among drivers 80 years and older demonstrated a significant downward linear trend (P = .01). When comparing prelaw (2001-2003) and postlaw (2004-2006) periods, the fatality rate among all-aged occupants increased by 6% (rate ratio, 1.06; 95% confidence interval, 0.99-1.14); conversely, fatalities among drivers 80 years and older decreased significantly by 17% (rate ratio, 0.83; 95% confidence interval, 0.72-0.98).
Conclusions Despite little evidence for an association between visual acuity and MVC involvement, the results of this study suggest that a vision screening law targeting Floridians 80 years and older resulted in a reduction in the MVC fatality rate among such drivers. The exact mechanism responsible for this association is unclear and future research should attempt to identify what might explain this relationship.
Author Affiliations: Department of Ophthalmology (Drs McGwin and Owsley) and Section of Trauma, Burns, and Surgical Critical Care, Division of General Surgery, Department of Surgery (Drs McGwin and Rue and Messrs Sarrels and Griffin), School of Medicine, and Department of Epidemiology, School of Public Health (Dr McGwin and Mr Griffin), University of Alabama at Birmingham.
|
