As with everything there is always multiple factors, one of them being chance, this article (interactive no less) seems to highlight this very well. I guess th

As with everything there is always multiple factors, one of them being chance, this article (interactive no less) seems to highlight this very well. I guess the rest of us not in the hospital business can use this to be weary of statistics and data presented to us, even when provided from a reliable source. When gathering our own statistics its often necessary to do that for a prolonged period in order to let the data reveal what and what isn't pure chance.