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The researchers looked at ‘Children of the 90s’ birth cohort data, officially called the Avon Longitudinal Study of Parents and Children(ALSPAC) at the University of Bristol, to look for an association between measures of childhood IQ at age eight and lifetime manic features assessed at 22-23 years. They found that higher childhood IQ could indicate a risk of bipolar disorder in adulthood.
Children had both verbal IQ (VIQ) and performance IQ (PIQ) assessed at age eight, to give a full-scale IQ (FIQ) measurement.
The final results, which combined data from 1,881 individuals, showed a positive association between IQ at age eight and lifetime manic features at age 22-23. Individuals who scored in the top ten per cent of manic features had a mean childhood IQ which was almost ten points higher than those scoring in the lowest ten per cent of manic features. The association between IQ and manic features was strongest for verbal IQ (VIQ).For more click here
Source: University of Bristol