© Don Hammond / Design Pics Inc. / Rex FeaturesHealth and intelligence may be the result of the same genetic factors.
In addition to checking blood pressure and heart rate, doctors may want to test their patients' IQs to get a good measure of overall health.
A new study of 3654 Vietnam War veterans finds that men with lower IQs are more likely to suffer from dozens of health problems - from hernias, to ear inflammation, to cataracts - compared with those showing greater intelligence.
This offers tantalising - yet preliminary - evidence that health and intelligence are the result of common genetic factors, and that low intelligence may be an indication of harmful genetic mutations.
"It poses the question to epidemiologists: why is it that intelligence is a predictor for things that seem so very far removed from the brain," says Rosalind Arden, a psychologist at King's College London, who led the study.