Informant Ratings of Cognitive Decline of Elderly People: Relationship to Longitudinal Change on Cognitive Tests | Zendy

Anthony F. Jorm | Zendy; Helen Christensen | Zendy; A. S. Henderson | Zendy; P. A. Jacomb | Zendy; A. E. Korten | Zendy; Andrew Mackin | Zendy

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Informant Ratings of Cognitive Decline of Elderly People: Relationship to Longitudinal Change on Cognitive Tests

Author(s) -

Anthony F. Jorm,

Helen Christensen,

A. S. Henderson,

P. A. Jacomb,

A. E. Korten,

Andrew Mackin

Publication year - 1996

Publication title -

age and ageing

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.014

H-Index - 143

eISSN - 1468-2834

pISSN - 0002-0729

DOI - 10.1093/ageing/25.2.125

Subject(s) - cognitive decline , cognition , cognitive test , gerontology , medicine , cognitive assessment system , test (biology) , longitudinal study , psychology , clinical psychology , cognitive impairment , psychiatry , dementia , paleontology , disease , pathology , biology

Formal assessment of cognitive decline with cognitive tests can be difficult, requiring either two measurement points or a comparison of 'hold' with 'don't hold' tests. Informant-based assessment provides an alternative approach because informants can adopt a longitudinal perspective and directly rate cognitive change. A study was carried out to assess the validity of informant ratings collected by means of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE). A community sample of 500 subjects aged 74 or over underwent four cognitive tests on two occasions 3½ years apart. On the second occasion, informants filled out the IQCODE. Subjects rated as having moderate or severe decline were found to have greater change on the cognitive tests. These findings support the validity of informant ratings of cognitive decline.

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