nicole you triggered a memory
i read an article, i can't find it, a long time ago, contrasting two old people in a nursing home
one was a sweet old lady. she got depressed
one was a mean old man. he smelled of urine so people avoided him. he said people avoided him "because he was tough and they respected his toughness"
he lived longer
there really may be something to the idea that delusional malevolence imparts longer life, maybe a psychological mechanism