A few weeks ago, I came across an article comparing the health care systems of eleven developed countries. This made me wonder how much health care system quality impacts physical wellbeing, for which I used life expectancy as a proxy. I was expecting a strong correlation between the two, but in fact health care system quality doesn't seem to be that important.
|Healthcare system ranking (from best to worst) and life expectancy of eleven Western countries. The correlation (r) is -0.32 (solid line), or 0.06 when excluding the United States as an outlier (dotted line). In either case, the 95% confidence interval of the correlation spans zero, meaning that the data does not support any relationship between the two variables|
Health warning: Do not overinterpret such a small dataset. This is me messing around with a few numbers I found on the internet. I am not a health economist.