title: The possible effect on frequency of cycling if mandatory bicycle helmet legislation was repealed in Sydney, Australia: a cross sectional survey.
abstract: OBJECTIVE
  Australia has national, state and city targets to increase levels of cycling. The possible effect of repealing mandatory bicycle helmet legislation on the frequency of cycling in Sydney is examined.
  
  
  METHODS
  A cross sectional survey by a market research company was conducted, using quota sampling, in Sydney, Australia. Participants were 600 residents aged 16 years and older. Data were collected in October 2010 using computer-assisted telephone interviews from randomly sampled households, with one respondent per household. The primary outcome measures were propensity to cycle more if a helmet was not required, how often a respondent who cycled would cycle without a helmet, and opinion on compulsory wearing of bicycle helmets. Frequency of cycling, and demographic questions were also assessed. Multiple logistic regression models were run for each of the three main outcomes.
  
  
  RESULTS
  One in five (22.6%, 95% CI 18.8-26.4%) respondents said they would cycle more if they did not have to wear a helmet, particularly occasional cyclists (40.4% of those who had cycled in the past week and 33.1% of those who had cycled in the past month). Almost half (47.6%) of respondents said they would never ride without a helmet, 14.4% said'all the time, 30.4% said 'some of the time' and the rest were not sure. One third (32.7%, 95% CI 28.5-37.0%) of respondents did not support mandatory helmet legislation.
  
  
  CONCLUSIONS
  While a hypothetical situation, if only half of the 22.6% of respondents who said they would cycle more if they did not have to wear a helmet did ride more, Sydney targets for increasing cycling would be achieved by repealing mandatory bicycle helmet legislation. A significant proportion of the population would continue to wear helmets even if they were not required to do so.
authors.affiliation: School of Public Health, University of Sydney, New South Wales. chris.rissel@sydney.edu.au
authors.forename: Chris
authors.initials: C
authors.lastname: Rissel
authors.forename: Li Ming
authors.initials: LM
authors.lastname: Wen
mesh_terms: D000293:Adolescent; D000328:Adult; D001315:Australia; D001642:Bicycling / Q000331:legislation & jurisprudence* / Q000523:psychology / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D005260:Female; D006260:Head Protective Devices; D006801:Humans; D007407:Interviews as Topic; D007878:Legislation as Topic; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires; D055815:Young Adult