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Smart children more likely to live longer and stay disease free, study suggestsSchool swots who faced a ribbing from their classmates for being too brainy will have the last laugh, according to a new study which found high IQ in childhood is linked to a longer life. Researchers at Edinburgh University, Oxford and University College London followed up more than 65,000 people who took part in The Scottish Mental Survey in 1947, aged 11 to find out if intelligence as a youngster had affected their life, and death. They discovered that by the age of 79, having a high IQ lowered the risk of dying from heart disease, stroke, cancer, and respiratory diseases.
"I'm being optimistic about these results,” said Professor Ian Deary, of the University of Edinburgh, who led the research. "I'm hoping it means that if we can find out what smart people do and copy them, then we have a chance of a slightly longer and healthier life. We don't fully know yet why intelligence from childhood and longevity are related, and we are keeping an open mind. Lifestyles (e.g. not smoking), education, health literacy, less deprivation, and genetics might all play a part. We and other research teams are testing these ideas."
The lower risk of death even remained when accounting for factors which could have influenced the results, such as age, sex, and socio-economic status. In fact deprivation, such as unemployment, overcrowding, and other adverse living conditions are thought to account for only about 30 per cent of the IQ-mortality correlation.