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This varies a lot by socioeconomic class: http://www.equality-of-opportunity.org/health/

Factors are of course overlapping, but you could think about what questions a life insurer would ask you, since they have money on the line and probably the best models.

Smoking is a really big one, given that it's estimate that 2/3 of life-long smokers die due to smoking and that continuing to smoke across a lifetime is estimated to reduce your life expectancy by 10 years.

in certain countries, yes

meanwhile in blue zones all over the world, the longest living people in the world are mostly quite poor

A lot of that is that poor places also have poor record-keeping: https://marginalrevolution.com/marginalrevolution/2023/09/th...

Not only poor record keeping, a lot of longest living people in Japan at least are simply descendants committing pension fraud. Well, I guess that also counts as poor record keeping.

Lol this would compound the issue because rich families would want to transfer control of assets only the poor would benefit from the fictional longevity of their equally poor relations

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