It's well known that higher IQ correlates with greater income. I wonder if higher IQ also correlates with better health.
Even more interesting is if being around people with (on average) higher IQ, correlates with better health by osmosis of sorts, by people picking up good habits from those around them.
* Higher income -> less likelihood of lead poisoning -> higher intelligence
* Higher intelligence -> more success in job market -> higher income
* Better health as a child -> better brain development -> higher intelligence
* Higher intelligence -> more likely to exercise, eat healthy -> better health
From here: https://en.wikipedia.org/wiki/Cognitive_epidemiology
A strong inverse correlation between early life intelligence and mortality has been shown across different populations, in different countries, and in different epochs."[3][4][5]
A study of one million Swedish men found showed "a strong link between cognitive ability and the risk of death."[6][7][8][9]
A similar study of 4,289 former US soldiers showed a similar relationship between IQ and mortality.[7][8][10]
The strong correlation between intelligence and mortality has raised questions as to how better public education could delay mortality.[11]
There is a known inverse correlation between socioeconomic position and health. A 2006 study found that controlling for IQ caused a marked reduction in this association.[12]
Research in Scotland has shown that a 15-point lower IQ meant people had a fifth less chance of seeing their 76th birthday, while those with a 30-point disadvantage were 37% less likely than those with a higher IQ to live that long.[13]