Maybe you guys have heard of recent news mentioning how the wealthiest Americans live shorter than the poorest Western Europeans. This is the base study that supported that claim.

We performed a longitudinal, retrospective cohort study involving adults 50 to 85 years of age who were included in the Health and Retirement Study and the Survey of Health, Ageing, and Retirement in Europe between 2010 and 2022. Wealth quartiles were defined according to age group and country, with quartile 1 comprising the poorest participants and quartile 4 the wealthiest. Mortality and Kaplan–Meier curves were estimated for each wealth quartile across the United States and 16 countries in northern and western, southern, and eastern Europe…

… Although all the countries showed an association between wealth and mortality, the United States had the widest gap in mortality between the bottom and top wealth quartiles. Mortality among the wealthiest Americans appeared to be higher than that among most northern and western Europeans and the wealthiest southern Europeans and similar to that among the poorest northern and western Europeans and most eastern Europeans. The poorest Americans appeared to have the lowest survival among all wealth groups in the study sample. U.S. regional differences in mortality were minimal, except for the finding of lower mortality among the wealthiest participants in western states than among the wealthiest participants in the other U.S. Census regions.

The DOI link doesn’t seem to be working quite yet.