These are some articles I have come across that may help you though your journey.
Optimism is associated with exceptional longevity
in 2 epidemiologic cohorts of men and women
Lewina O. Lee, Peter James, Emily S. Zevon, Eric S. Kim, Claudia Trudel-Fitzgerald, Avron
Spiro III, Francine Grodstein, and Laura D. Kubzansky
PNAS first published August 26, 2019 https://doi.org/10.1073/pnas.1900712116