I remember reading this article, or another on the same subject, not too long ago. It’s not a scientific study, this article sitting on the huffington post along with 23 Things You Should Never Say To A Curvy Woman, but as it’s just recorded data by a nurse (albeit somewhat quantitative) there’s no reason not to view it as accurate. She does say “many developed illnesses relating to the bitterness and resentment they carried as a result”, though, which is pretty fishy.
All of the top five regrets of the dying are suggestive of cowardice. This list scares the shit out of me.