“…[13][14][15] These reported behaviors were considerably lower, for example, than the 95% reported in New Zealand among young motorcyclists, 4 82% in a U.S. trauma center among patients admitted after motorcycle crashes, 16 the 71% and 62.8% among those queried, respectively, Յ15 years of age at a popular recreation site, 17 and in a nationally representative sample of students in grades 9-12, 18 respectively. Moreover, prevalence in our study was higher than the results observed in Thailand, where 46% of the motorcyclists wore helmets after an educational program, 19 and 13.1% among injured motorcyclists aged Յ20 years, 13 and 3% of Australian children aged Ͻ 15 years at the time of injury. 8 A possible explanation of these differences is sociocultural and environmental factors as well as police surveillance and punishment of transgressions.…”