Predicción de deterioro cognitivo en esquizofrenia: retrospectiva de 31 años
2018
The purpose of this study is to find out which tests from the Wechsler Intelligence Scale
define the most detailed cognitive model that is able to predict the relevant cognitive
impairment in elderly people with schizophrenia. A group of 30 institutionalised women who
were diagnosed with schizophrenia were assessed with MEC-35; they had been previously
assessed 31 years before using the WAIS. It was found that 53.3% of the patients showed
significant cognitive impairment and 31 years ago their scores were lower in all the subtests
from the WAIS. Those differences are significant (p< .05) in all of the IQ measurements.
Throughout the logistical regression analysis we found that the cognitive model that made the
best prediction was produced from the following subtests: Similarities, Puzzles and
Arithmetic, classifying 96.7% of the cases and showing an excellent criterion validity, a
sensitivity of 93.8% and a 100% of specificity. We conclude that the increase of the cognitive
impairment in elderly patients with schizophrenia seems to be associated with previous low
fluid intelligence.
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