A 10-year-long Scandinavian study has shed light on a small group of schizophrenic patients who suffer a greater decline in IQ over time than most patients.
Researchers at the University of Oslo and Yale have discovered that people who are diagnosed with schizophrenia often have a more positive illness trajectory than was previously thought. However, a subgroup of the study’s patients who experienced repeated psychosis after receiving treatment demonstrated significant deterioration of verbal recall and working memory ability over time. In other words, those who had a longer duration of psychosis after starting treatment saw their IQs drop more than those who experienced a shorter duration of psychosis.
These findings emphasize the need for patients at higher risk to be monitored more closely in order to detect episodes before they manifest themselves, according to secondary author and University of Oslo professor of neuropsychology Kjetil Sundet.
He added that the ultimate goal in treating schizophrenic patients is to notice these warning signs before the onset of even the first psychotic episode.
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