The US has the world's largest healthspan-lifespan gap (12.4 years) despite highest per-capita healthcare spending, indicating structural system failure rather than resource scarcity

The Mayo Clinic study examined healthspan-lifespan gaps across 183 WHO member states from 2000-2019 and found the United States has the largest gap globally at 12.4 years—meaning Americans live on average 12.4 years with significant disability and sickness. This exceeds other high-income nations: Australia (12.1 years), New Zealand (11.8 years), UK (11.3 years), and Norway (11.2 years). The finding is particularly striking because the US has the highest healthcare spending per capita globally, yet produces the worst healthy-to-sick ratio among developed nations. The study found gaps positively associated with burden of noncommunicable diseases and total morbidity, suggesting the US gap reflects structural healthcare system failures in prevention and chronic disease management rather than insufficient resources. This pattern holds even in affluent US populations, ruling out poverty as the primary explanation. The global healthspan-lifespan gap widened from 8.5 years (2000) to 9.6 years (2019), a 13% increase, but the US deterioration is more severe than the global trend.