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By 3 months of age,the mean mental and motor scores of the infected infants were significantly lower than those of the uninfected controls. Furthermore,the initial differences between the two groups increased over time,as many of the infected infants became increasingly delayed.Although the infected infants tended to perform more poorly than the uninfected infants,nearly one third of the infected infants exhibited relatively normal cognitive development and half demonstrated relatively normal motor development.Over the first 24 months of life,the mean rate of development of HIV-infected infants is significantly slower than that of noninfected infants born to seropositive mothers.This occurs even when the effects are not confounded with those of prenatal drug exposure. |
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