This seems a good topic for this group!

Makes a difference to uh . . . mortality. But I think we all know that, really.

JAMA Network | JAMA Internal Medicine | Feeling Old vs Being Old: *Associations Between Self-perceived Age and Mortality

Too bad we can't see the whole article for free, but the first page pretty much tells the story. I subscribe, so I've read the whole thing.

How old do you feel compared to your calendar age?