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Centre for Policy on Ageing | |
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The informant questionnaire on cognitive decline in the elderly (IQCODE)
— a review | | Author(s) | Anthony Jorm |
| Journal title | International Psychogeriatrics, vol 16, no 3, September 2004 |
| Pages | pp 275-294 |
| Source | http://journals.cambridge.org |
| Keywords | Cognitive impairment ; Dementia ; Screening ; Evaluation ; Research Reviews. |
| Annotation | The informant questionnaire on cognitive decline in the elderly (IQCODE) is widely used as a screening test for dementia, particularly where the subject is unable to undergo direct cognitive testing, or for screening in populations with low levels of education and literacy. This review, based on a systematic literature search from three databases, draws together research on the psychometric properties and validity of the IQCODE. The review shows that the questionnaire has high reliability and measures a single general factor of cognitive decline. Its validity reflects past cognitive decline, performs at least as well at screening as conventional cognitive screening tests, predicts incident dementia, and correlates with a wide range of cognitive tests. A particular strength is that the IQCODE is relatively unaffected by education and pre-morbid ability, or by proficiency in the culture's dominant language. The disadvantage of the IQCODE is that it is affected by informant characteristics such as depression and anxiety in the informant, and the quality of the relationship between the informant and the subject. Thus, because the IQCODE provides information complementary to brief cognitive tests, harnessing them together can improve screening accuracy. (RH). |
| Accession Number | CPA-050216501 A |
| Classmark | E4: EA: 3V: 4C: 3A:6KC |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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