Study results showed that people who lived longer had a high childhood IQ irrespective of income and social position. The research study was carried out by Dr Laurie Martin and Laura Kubzansky, Harvard's School of Public Health who reported their finding in the American Journal of Epidemiology.
Childhood IQ of more than 163 score is very rare and is considered as very intelligent and the children's with a score more than 130 are considered gifted and children's with score of 100 considered as average. Though there is no relation found between IQ score and longevity, researchers feel there may be a relationship between IQ to health problems independent of socioeconomic status. As research has already linked IQ to mortality, the current study, according to Martin, was in part an attempt to see how far the IQ-health advantage extends. The researchers expected there to be a cutoff at which a high IQ no longer brought any extra health benefits. Researchers conclude that children's with an IQ more than 163 had a great longevity of life compared to less IQ children's and longevity of life increased with IQ scores.