In reply to Doogleman: OK about using what you understand is risk taking behaviour and sociological research but there's a maasive assumption going on here that folk over 30 will be as ready and willing to participate in surveys as perhaps those younger than 30 might be. It is also too glib to write 'sociological research' because different cultures throw-up different results and most of this so-called research is based on poor definitions & often biased assumptions for which there is uttelry no basis. I think your second reason exemplifies just my point: you've fallen for the obvious trap and when you get to be interviewed for your MSc /MA about your thesis or whatever this sort of purile assumption-making will have you slaughtered!
With one small example, just remember, that according to Emergency Care statistics one of the growing goups self-inflciting alcohol-induced injury and illness is the 30+ age group because they frequently binge at home with whatever they fancy. If that's not risk taking', perhaps definitions need to be agreed first.
....and seeing as we're on a climbing website: what's risk the difference between 1) two middle-aged, experienced climbers taking a quick punt on a full traverse of The Briethorn (when the forecast is extremely dodgey, Guides are not heading out and recent unsettled weather has mitigated against relaible weather yet the pair read the Meteo and saw a definite hint of a short window of good weather) and 2) a pair of young-guns who are really just athletic inexperienced numptees but attempt some totally over-graded but nevertheless hard sport route on which they both mess-up and achieve monstrous falls and then post that 'they've had an epic day', 'they've really pushed it out, man' and then get slaughtered on a few bottles of the expensive beers whilst lauded by their mates who see them as heros?
Clearly, my question invites loads of humour(please....!) but the risk taking of the midlle-aged pair, in my mind, far out weighs the brashness of the younger folk. So, from our sport, please don't rely on any aged-based assumptions because age in our sport has little bearing. I know the adage, "there's old climbers and there's bold climbers but nowt bold and old!" but just think of the numerous 30+yrs Sponsored guys and gals out there excelling around the world's mountains and you'll agree that your stats. are based on totally flawed and useless assumptions.