Using nationally representative survey data and biological markers from the U.S. (Health and Retirement Study (HRS) / National Health and Nutrition Examination Survey (NHANES)) and England (English Longitudinal Study of Ageing (ELSA) / Health Survey for England (HSE)), Banks et al. show that Americans aged 55–64 have dramatically higher rates of chronic disease than the English at every level of the socioeconomic status (SES) distribution. The differences survive adjustment for standard behavioral risk factors and are confirmed by blood-based disease markers, ruling out reporting bias or differential diagnosis thresholds as explanations.
"Americans are much less healthy than their English counterparts and these differences exist at all points of the SES distribution."
"A standard set of risk factors (smoking, drinking, and obesity) do not fully account for morbidity differences between and within each country."
"Health insurance cannot be the central reason for the better health outcomes in England because the top SES tier of the US population have close to universal access but their health outcomes are often worse than those of their English counterparts."
This paper is a methodological landmark because it combines biological validation with self-reports, definitively ruling out the reporting-bias objection. The insurance explanation is specifically disabled by showing that even well-insured top-SES Americans lag English counterparts. The unexplained residual — what's left after controlling for behaviors, insurance, and demographics — is substantial and poorly understood. The paper doesn't identify the cause; it eliminates the easy answers. The 2002 data predate the deaths-of-despair acceleration and the opioid epidemic peak; if replicated today the gaps would likely be wider. Marmot's social determinants framework is invoked but not tested causally here.