My great grandmother who lived to be 103 lived the last 10 years of her life in a wheel chair because she refused to go to the hospital to get a hip replacement (a fairly simple procedure) because she KNEW she would never leave alive if she went.
I have had several people in my family who lived beyond or near a 100... and every one of them said the secret was to stay away from the hospital.I agree with this, for several different reasons.
First there's the whole question of secondary infections, which is literally a killer.
And of course there's just poor care in general, and doctors cutting corners, and a system that is absolutely biased against older people.
But more importantly, if you decide early in life (and that can mean in your 60s or 70s if you're still reasonably healthy) that you don't WANT to go to a hospital, then you take the extra steps (literally) to keep yourself out: you eat better and you take frequent long walks.
It's not 100%, but taken together its a miracle cure (and prevention) for many ailments.