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Regardless of the denominator used(resident population,motorcycle registrations,or motorcycle crashes),states with full helmet-use laws had consistently lower head injury-associated death rates than states without such laws,even when stratified by region.Total motorcycle-related mortality,however,was similar between law groups.On a registration or crash basis,motorcyclists who died in crashes had a fivefold to sixfold higher risk of head injury than those who died using any other type of motor vehicle.Full helmet-use laws were consistently associated with lower rates of head injury-associated death.While disagreement remains on the acceptability of the legislative approach,the scientific basis for motorcycle helmet-use laws as a head injury prevention tool appears sound. |
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