"waffle" <
[email protected]> wrote in message
news:[email protected]...
> The whole objection to helmets (which the vast majority of cyclists in Australia don't have)
> appears to stem purely from vanity as far as i can tell.
No, the whole objection is that in the countries where it's been tried (which include Australia, New
Zealand, parts of the US and Canada) the result has been (a) a substantial drop in numbers cycling
and (b) no drop in cyclist head injury rates.
If you plot the head injury rate in New Zealand over a period which includes the year their law was
introduced, which increased wearing rates from around 43% to over 95%, you can't see fromt he graph
which year the helmet law was introduced.
That's mainly because the Liddites like to pretend that their claimed "88% of injuries saved" figure
(which was, incidentally, revised substantially downwards by its authors in 1996) applies to all
head injuries. There is no mechanism by which helmets can prevent subdural heamatoma (SDH) and
diffuse axonal injury (DAI), the two major causes of serious brain injury.
They also repudiate the idea of risk ocmpensation, but without advancing any alternative explanation
of why often substantial increases in helemt usage rates have never been accompanied by matching
reductions in injury rates.
This is further confounded by the fact that half of cyclist deaths are recorded as "head injury" -
but on investigation most of those cyclists are found to have other mortal injuries as well.
Helmets appear to work well against trivial injuries, but they are neither designed nor proven to be
effective in crashes above 12mph, or crashes involving motor vehicles. Their role in these
circumstances is at best marginal. The best estimate Ihave seenw hich accounts for the above
factors, which came I think from RoSPA, was a saving of two lives per annum if helmets were
universally worn in the UK. That takes no account of the likely life years lost if fewer people
cycle - cycling is recognised as one of the more beneficial forms of exercise, and estimates of up
to ten additional life years accrued by regular cycling are not uncommon.
--
Guy
===
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