Lower childhood IQ associated with higher risk of adult mental disorders

Researchers have hypothesized that people with lower IQs may have a higher risk of adult mental disorders, but few studies have looked at the relationship between low childhood IQ and psychiatric disorders later in life. In a new, long-term study covering more than three decades, researchers at Harvard School of Public Health (HSPH) found that children with lower IQs showed an increased risk of developing psychiatric disorders as adults, including schizophrenia, depression and generalized anxiety disorder. Lower IQ was also associated with psychiatric disorders that were more persistent and an increased risk of having two or more diagnoses at age 32.

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