We know that fall occurs rarely while doing normal activities of daily living. I am interested to know the odds of falling (or its probability).
WikiAnswers (http://wiki.answers.com/Q/What_are_the_odds_of_falling_down_stairs?#slide=2) says the odds for falling down stairs is 1:20,000, however I am interested in knowing the odds of falling down in general (not necessarily incurring fall while climbing stairs down) and any rational argument to support that number or is there any credible study that provides an empirical evidence at arriving such number?