From: Bike helmets prevent pediatric head injury in serious bicycle crashes with motor vehicles
No head Injury 57 (25.2%)
Head injury 169 (74.8%)
Total 226 (100%)
No Helmet
42 (21.1%)
157 (78.9%)
199 (88.1%)
Helmet
15 (55.5%)
12 (44.5%)
27 (11.9%)