Statistics are wonderful aren't they?

Dangling questions:
A) What do the cat owners die from?
B) Do they actually live any longer?

I'm sure that the owners of man-eating tigers are also less likely to die of heart attack and stroke, but that's not a good thing.

"Dr. Adnan Qureshi ... and his team analyzed a group of 4,435 people who had answered questionnaires about pet ownership and other risk factors."
And how do dead people answer questionnaires?