title: Bicycling exposure and severe injuries in school-age children. A population-based study.
abstract: OBJECTIVE
  To examine exposure to bicycling and its association with severe bicycle injuries in school-age children in a defined population.
  
  
  METHODS
  Random-digit dialing telephone survey and analysis of hospital discharge records.
  
  
  METHODS
  Metropolitan Toronto, Ontario.
  
  
  METHODS
  Sample of parents of children aged 5 to 17 years who owned a bicycle; all children who were admitted to hospitals with bicycle-related injuries from April 1989 to March 1991.
  
  
  RESULTS
  Median annual bicycling hours and distance by age and sex; age- and sex-specific incidence rates by population at risk, cumulative exposure hours, and riding distances.
  
  
  RESULTS
  More than half of the children of all age groups were exposed to bicycling more than 100 hours per year. Boys spent more hours and rode longer distances than girls in every age group. The overall annual injury rates were 8.1 and 3.4 per 10,000 population at risk for boys and girls, respectively. About half of the injuries suffered were head injuries. When rates were estimated on the basis of exposure, boys still experienced a higher injury rate than girls. Boys displayed a slight increase with age in rates per unit of exposure hours. Conversely, age appeared to be negatively associated with overall and head injury rates when exposure was expressed by distance ridden.
  
  
  CONCLUSIONS
  Boys had a higher injury rate than girls, and bicycle-related injuries are more likely to be associated with exposure time than distance ridden.
authors.affiliation: Hospital for Sick Children, Toronto, Ontario.
authors.forename: X
authors.initials: X
authors.lastname: Hu
authors.forename: D E
authors.initials: DE
authors.lastname: Wesson
authors.forename: M L
authors.initials: ML
authors.lastname: Chipman
authors.forename: P C
authors.initials: PC
authors.lastname: Parkin
mesh_terms: D000293:Adolescent; D001642:Bicycling / Q000293:injuries*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data / Q000639:trends; D006801:Humans; D015994:Incidence; D008297:Male; D009864:Ontario / Q000453:epidemiology; D011159:Population Surveillance; D012307:Risk Factors; D014504:Urban Health; D014947:Wounds and Injuries / Q000453:epidemiology / Q000209:etiology