published helmet research - not troll

LioNiNoiL_a t_Ne t s c a pE_D 0 T_Ne T wrote:

The Effect of Bicycle Helmet Legislation on Bicycling Fatalities -
Grant and Rutner.


Their statistics are sound, and their calculation of a 15% reduction in
the juvenile bicycling fatality rate during the helmet-law era appears
to be accurate, although virtually indistinguishable from the
already-existing downward trend since 1975, represented by the blue line
in their data graph:

http://img22.imageshack.us/img22/9715/graph.gif

Yes - if helmets were having a significant effect, that graph should
show a significant drop in juvenile fatalities, over and above the
prevailing trend, from 1991 to 1997, when (as they show) the helmet laws
became fashionable.

Incidentally, there are several sources on the web which plot cylist
fatalities and pedestrian fatalities over the decades. Despite the
increase in helmet use, the plots are stubbornly parallel... with, of
course, a certain amount of random variation superimposed.

It seems clear that a) the emergency medical people have gotten
gradually better at their job (probably in large part due to
technology), and b) helmets aren't making a significant difference in
cyclists' fatalities. If they were, the cyclist plot would drop
relative to the ped. plot.




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Frank Krygowski [To reply, remove rodent and vegetable dot com,
replace with cc.ysu dot edu]