Guns & Swimming Pools

The Levitt and Dubner article below made me look for the answer to the question "Which is more dangerous: a gun or a swimming pool?" they pose. It's answered in The Probability That a Real-Estate Agent Is Cheating You (and Other Riddles of Modern Life) By STEPHEN J. DUBNER. As one might have guessed, Levitt's research showed

If you own a gun and have a swimming pool in the yard, the swimming pool is almost 100 times more likely to kill a child than the gun is.