Steady rider wrote:Weaknesses with a meta-analysis approach to assessing cycle helmets. Feb 2017 http://worldtransportjournal.com/wp-con ... eb-opt.pdf
provides the full paper.
Thanks
Jonathan
Steady rider wrote:Weaknesses with a meta-analysis approach to assessing cycle helmets. Feb 2017 http://worldtransportjournal.com/wp-con ... eb-opt.pdf
provides the full paper.
Steady rider wrote:The NZ situation may have been similar and a major reduction in cycling for children could have resulted in a much lower overall TBI rate.
If the TBI data by age group had been readily available a fuller analysis could have been provided. The 2012 NZ paper used fatality data that is probably more reliable than TBI data.
Any explanation for the observed reduction in TBI when injuries to all other body parts increased?
see
And I'd be interested in why you think that Clarke chose not to refer to that while citing the original study that showed it and explicitly mentioning injuries to another body part.
The rate of traumatic brain injuries fell from 1988-91 to 1996-99; however, injuries to other body parts increased steadily.
Steady rider wrote:With a major reduction in children cycling, a reduced TBI was expected...
Steady rider wrote:... Tin Tin details other body parts increased steadily.
Steady rider wrote:The answer appears to be due to the changes in the ratio of adults to children plus the change in the higher proportion of accidents due to falls and potential changes due to improved road safety.
Total hours cycled would reduce and with children having higher head injury rates than adults, head injuries would reduce by a larger percent.
With helmet use resulting in a higher fall off rate this would increase the rate of other body parts injured. Helmet use may also help prevent some head injuries. The combination of factors seems to be a lower head injury rate and increased other injury rate per million hours cycled.
Roughly, the 9-16 age group had a rate of 55 and the 17-64 age group a rate of 20 and for age 65+ a
rate of 110 per 10 million km. Indications are that the 65+ group comprised about 1% of distance cycled, the
0-16 age group about 60%, and the 17- 64 age group about 39%.
OldLimey wrote:If not wearing a helmet protects our brains, why do pro racing cyclists wear them?