>>American pro Saul Raisan was nearly killed in a crash from a head injury a couple of years ago even though he was wearing a helmet.<<

How much do you want to bet that the physicians who treated Saul don't need to be convinced that the helmet saved the patient's life?

Whatever. If I were you I'd stop worrying about studies and statistics and I'd start worrying about my head (if you even ride a bicycle at all), but then I'm not an arrogant know-it-all (on this particular topic, I am an arrogant know-it-all on every other topic). But that arrogance is far less likely to kill me than yours seems to be likely to kill you.

What are you trying to prove? What's your point? Besides utter troll value (kudos), where are you going with this?