Well, I know that, but as far as I know there is as of yet no study that thoroughly examines helmet-wearing by populations of non-compelled utility cyclists. For starters, it's difficult to construct such a study, choose subjects, etc.--the epidemiological compulsion studies have the advantage that 'participants' don't know they're being observed. :)
Everybody knows that if you play football competitively, you have a greater risk of injury than if you kick a tin can around. Obviously, you can still get injured doing that, and if you compete you're probably fitter and more adept at moving, etc., but your risk of injury is still greater. It is only to be expected that mountain bikers and road racers get injured more than ordinary commuters et al. That (almost) only sporty risk-takers wear helmets in NL is, I think, unlike any other country.
Well, I know that, but as far as I know there is as of yet no study that thoroughly examines helmet-wearing by populations of non-compelled utility cyclists. For starters, it's difficult to construct such a study, choose subjects, etc.--the epidemiological compulsion studies have the advantage that 'participants' don't know they're being observed. :)
Everybody knows that if you play football competitively, you have a greater risk of injury than if you kick a tin can around. Obviously, you can still get injured doing that, and if you compete you're probably fitter and more adept at moving, etc., but your risk of injury is still greater. It is only to be expected that mountain bikers and road racers get injured more than ordinary commuters et al. That (almost) only sporty risk-takers wear helmets in NL is, I think, unlike any other country.