i think its all about how you twist the numbers, but it also depends on
a ton of variables. example: i don't wear a helmet while riding here in
europe, except when in some races, but if i were in a big city in the states,
i'd probably ...probably wear a helmet. because i know in the states, for
the most part, less attention is given to cyclists.

also, alot of these articles are geared towards commuter and road cycling
situations. when i ride off-road i wear a helmet because i know that most
crashes usually aren't as bad as getting hit by a car and landing on asphalt,
but are enough to still do damage to my head.