The relationship between total health expenditure (or only public expenditure on health, which account for about 75% of total health spending) and life expectancy at birth provides a broad measure of health-spending effectiveness, although life expectancy is the result of various factors. Higher health spending is associated with longer lives, although with diminishing returns. Beyond a certain threshold, policy choices, environmental factors and individual lifestyles can explain the difference in life expectancy between countries.
Japan, Italy, Spain, Israel and Korea have relatively high life expectancy given their health expenditure levels. On the other hand, life expectancy in the United States, and to a lesser extent in Latvia, Mexico and Hungary, is lower than expected at their levels of health spending. Factors explaining this phenomenon in the United States include: the highly fragmented nature of the health system - with relatively few resources devoted to public health and primary care-; health-related behaviours, e.g. obesity rates and deaths from road traffic accidents; and higher poverty rates and income inequality than in most other OECD countries. Between 2015 and 2017, the opioid crisis and a slowdown in the reduction in cardiovascular mortality contributed to reduce life expectancy in the United States (Raleigh, 2019). In Hungary, Latvia and Lithuania, risk factors (e.g. tobacco use, alcohol consumption and unhealthy diet) prevalent among men, explain the relatively low life expectancy.