J
jtaylor
Guest
"Sorni" <[email protected]> wrote in message
news:[email protected]...
>
> "jtaylor" <[email protected]> wrote in message
> news:[email protected]!nnrp1.uunet.ca...
>
> > Given a choice (unfortunately many of us no longer have such a choice)
of
> > whether to wear a helmet while cycling, does it make a difference to the
> > likelyhood of injury?
>
> Of course.
>
Then why do not population-level studies show this?
news:[email protected]...
>
> "jtaylor" <[email protected]> wrote in message
> news:[email protected]!nnrp1.uunet.ca...
>
> > Given a choice (unfortunately many of us no longer have such a choice)
of
> > whether to wear a helmet while cycling, does it make a difference to the
> > likelyhood of injury?
>
> Of course.
>
Then why do not population-level studies show this?