Comment by mindcrime

The way I always looked at it (based on my own anecdotal experience, plus those of my friends around me)... you're probably more likely to get "hurt" in some sense while mountain biking, but probably more likely to get "killed or maimed" while road cycling (eg, being struck by a car).

Curiously enough, I have been road cycling for 10+ years now (and mountain biking much longer) and I only just picked up my first crash and injury from road cycling on Jan 1. I crashed and sprained my wrist. :-(