The study employed probabilistic linkage methods whereby statewide data from police crash reports, emergency medical services, hospital emergency departments, hospital discharge files, claims, and other sources were linked so that those people injured in motor vehicle crashes could be followed through the health care system. Linkage of population-based state data enable information for both the injured and uninjured to be used to determine the benefits of safety belts and helmets in motor vehicle crashes. It also provided access to financial information; inpatient charges (acute care, rehabilitation, long-term care) and estimates of actual costs using a charge-to-cost ratio.


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