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Paper Information

Journal:   JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES   DECEMBER 2011 , Volume 21 , Number 85; Page(s) 148 To 157.
 
Paper: 

RELATIONSHIP BETWEEN CURRENT AND PREMORBID IQ IN THE ELDERLY WITH DEMENTIA

 
 
Author(s):  RAHMANI FAHIMEH, HAGH SHENAS HASAN, KAFI SEYD MUSA, JAFARI ALI REZA, MANI ARASH
 
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Abstract: 

Background and purpose: Cognitive reserve is a hypothetical construct which is widely used to explain how individuals vary considerably in the severity of cognitive aging and clinical dementia, despite the similar nature and extent of neurodegenerative changes. This study was conducted to investigate the current and premorbid IQ in the elderly with dementia in comparison with those without it.
Materials and methods: In a cross-sectional study, using convenience sampling in nursing homes and the psychiatric clinic of Hafez Hospital in Shiraz, 70 participants were recruited and divided into two groups (35 patients and 35 healthy people) with the age range of 65-90 years. To gather data, the researchers used PART (Persian Adult Reading Test), four subtests of WAIS-R (vocabulary, arithmetic, block design, and picture completion), and Mini-Mental State Examination.
Results: The results of an independent t-test showed that current and premorbid IQ (verbal and performance) in the elderly with dementia were significantly lower in comparison with those without dementia. Also results obtained from paired t-test indicated that dementic participants had lower current IQ in contrast to their premorbid IQ scores.
Conclusion: It seems that premorbid IQ is a considerable factor for cognitive reserve and it is a basic criterion for evaluating the severity of cognitive decline. As a result, it helps predict the risk of developing dementia, to some extent.

 
Keyword(s): CURRENT IQ, PREMORBID IQ, THE ELDERLY, DEMENTIA
 
References: 
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