Spectrum Health Butterworth Hospital in Grand Rapids Michigan found higher mortality and medical costs among riders in crashes not wearing helmets. The study looked at 345 motorcycle crash victims over the course of four years, before and after the repeal of the 2012 mandatory motorcycle helmet law.
Average medical cost
Riders without helmets: $27,760
Riders with helmets $20,970
Mortality rate
Riders without helmets: 10 percent
Riders with helmets: 3 percent
Head injury scale (higher is more severe)
Riders without helmets: 2.2
Riders with helmets: 1.3
Overall injury severity score (Scoring six body regions including head and neck)
Riders without helmets: 19
Riders with helmets: 14.5
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