I would expect this to be correlated to not having kids as well. Anecdotally the healthiest elderly I know are deeply involved in raising grandkids/great grandkids, and those relatives without kids I've lost early.

I've heard of some efforts to pair retirement homes and preschools in some way, to benefit both, and I'd love to see that idea work in some way. I expect it to have many liability challenges but would be so good for both parties.