Espressopithecus (Java Man) wrote:
>
>
> My understanding of the research I've read includes the following:
>
> - In population studies, increased helmet use produces either no
> significant decrease in injury rates or an increase in injury rates.
> - Helmets do not reduce the damage from high impact head contacts that
> are forseeable in crashes at normal cycling speeds.
>
> Some of the questions I would like to see answered, but which haven't
> been in what I've read, includes:
> - what proportion of head injuries to helmeted cyclists occur to people
> wearing incorrectly fitted and/or worn helmets?
> - what proportion of head injuries to helmeted cyclists can be
> attributed to risk compensation?
> - what is the demographic breakout of head injuries to helmeted and
> unhelmeted cyclists by age and exposure, and by severity of head injury?
> - what are the risk and demographic breakdown (incidents per mile or
> hour) of the types of injuries helmets may provide protection for (e.g.
> lacerations, cuts, etc.) between helmeted and non-helmeted cyclists?
> - what are the risk and demographic breakdown (e.g. incidents per mile
> or hour) of the types of injuries helmets are unlikely to provide
> protection for (e.g. brain injuries) between helmeted and non-helmeted
> cyclists?
> - what are the benefits or disbenefits of helmets in off-road cycling?
>
> That's a start.
ISTM you're leaving out a fundamental question. I'm not sure whether
you'd claim it's in your first or your second category, but, why not
ask:
Is cycling dangerous enough that we even need to ask all the other
questions?
Data I've found indicate that cycling is nothing special regarding
production of brain injuries. It's safety level is fine, whether or
not a person wears a styrofoam cap. See
http://www.bicyclinglife.com/SafetySkills/SafetyQuiz.htm
If bicycling is already sufficiently safe, the helmet questions are
moot.
Now, if a person decided that despite favorable comparisons, they
wanted to make cycling even safer, another fundamental question arises:
Is wearing of helmets the best way to make cycling safer?
When one examines the causes of crashes that generate cycling's serious
injuries, ISTM that there are more effective measures that should be
attacked first. This also makes all your helmet questions moot points.
Finally, through it all, we should remember that, danger or no, cycling
is definitely beneficial on the balance. That is, years of life gained
through cycling have been computed (by Mayer Hillman, an eminent
British policy researcher) to outnumber years of life lost by a 20 to 1
ratio.
This means that any effort to make cycling safer must NOT decrease
cycling. It would take only a small decrease in cycling to do more
societal harm than good.
- Frank Krygowski