The psychologist who replied to the forum question did a great job explaining. Basically it is the adopted child whO has been living in an orphanage or institution that is at greater risk for ADHD. The causative factors may be:
prematurity, prenatal alcolhol exposure
One study I looked at found that levels of inattention/
Various studies also found that children who were institutionalized longer (from 18 months of age and longer) had a higher incidence of ADHD and behavioral problems. Another looked at the prevalence of ADHD medication usage in international adoptees in Sweden as opposed to the general population. The rates of ADHD meds were higher in the international adoptees for both boys and girls. The risk was increased for maternal education, single parenthood and higher age at adoption.
It does appear that adopted children who have lived in orphanages or institutions for a certain period of time may actually have a higher incidence of ADHD. In addition the symptoms may actually fit into a form of deprivation syndrome similar to ADHD. What I couldn't find is if ADHD meds helped these children.
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