Subnormal intellectual functioning which originates during the developmental period. This has multiple potential etiologies, including genetic defects and perinatal insults. Intelligence quotient (IQ) scores are commonly used to determine whether an individual has an intellectual disability. IQ scores between 70 and 79 are in the borderline range. Scores below 67 are in the disabled range. (from Joynt, Clinical Neurology, 1992, Ch55, p28)

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Transition to Adult Care for Individuals with Genetic Syndrome-related Intellectual and Developmental Disabilities
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Adapting Primary Care Visits to Youth and Adults with Intellectual and Developmental Disabilities
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Constipation Management in the IDD Population
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Epilepsy in People with Intellectual and Developmental Disabilities
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Aging and Intellectual and Developmental Disabilities
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