Hi Melody,

They calculate the per minute rate by looking at hospital records and doctors' billing codes and then dividing the cases by the total minutes in a year. It's just a way to give people a better sense of just how common this injury is.

Notwithstanding that my nation is hockey crazed, I suspect that the rate of concussion is probably pretty comparable among the industialized nations. Most concussion sufferers are young men. I suppose that has to do with their more active - and sometimes - risky lifestyles. Alcohol is directly invovled in 1/3 concussions. In my case, I was hit by a drunk driver.

Cheers