Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-18T09:22:17.565Z Has data issue: false hasContentIssue false
  • English
  • Français

Performance of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) as a screening test for dementia

Published online by Cambridge University Press:  09 July 2009

A. F. Jorm ,
R. Scott ,
J. S. Cullen  and
A. J. MacKinnon
A. F. Jorm*
Affiliation:
NH & MRC Social Psychiatry Research Unit, The Australian National University, Canberra, Australia
R. Scott
Affiliation:
NH & MRC Social Psychiatry Research Unit, The Australian National University, Canberra, Australia
J. S. Cullen
Affiliation:
NH & MRC Social Psychiatry Research Unit, The Australian National University, Canberra, Australia
A. J. MacKinnon
Affiliation:
NH & MRC Social Psychiatry Research Unit, The Australian National University, Canberra, Australia
*
1 Address for correspondence: Dr A. F. Jorm, NH & MRC Social Psychiatry Research Unit, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia.
Get access Rights & Permissions [Opens in a new window]

Synopsis

A 26-item informant questionnaire (IQCODE) and the Mini-Mental State Examination (MMSE) were compared as screening tests for dementia in a sample of 69 patients. Dementia diagnoses were made by both a clinician and a research interview using a computer algorithm to meet DSM-III-R and ICD-10 (Draft) criteria. The IQCODE was found to perform at least as well as the MMSE against all diagnoses and significantly better when judged against the algorithmic ICD-10 diagnoses. Also, the IQCODE was found to be uncontaminated by pre-morbid ability as estimated from the National Adult Reading Test and to have very high test–retest reliability after a delay of a day or more.

Type
Original Articles
Information
Psychological Medicine , Volume 21 , Issue 3 , August 1991 , pp. 785 - 790
Copyright
Copyright © Cambridge University Press 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

American Psychiatric Association (1987). Diagnostic and Statistical Manual of Mental Disorders (3rd ed revised). American Psychiatric Association: Washington DC.Google Scholar
Folstein, M. F., Folstein, S. E. & McHugh, P. R. (1975). ‘Mini-Mental State’: a practical method for grading the cognitive state of patients for the clinician. Journal of Psychiatric Research, 12, 189–198.Google Scholar
Hanley, J. A. & McNeil, B. J. (1982). The meaning and use of the area under a receiver operating characteristic (ROC) curve. Radiology 143, 29–36.CrossRefGoogle Scholar
Hanley, J. A. & McNeil, B. J. (1983). A method of comparing the areas under receiver operating characteristic curves derived from the same cases. Radiology 148, 839–843.Google Scholar
Jorm, A. F. & Jacomb, P. A. (1989). The Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): socio-demographic correlates, reliability, validity and some norms. Psychological Medicine 19, 1015–1022.CrossRefGoogle ScholarPubMed
Murphy, J. M., Berwick, D. M., Weinstein, M. C., Borus, J. F., Budman, S. H. & Klerman, G. L. (1987). Performance of screening and diagnostic tests. Application of receiver operating characteristic analysis. Archives of General Psychiatry 44, 550–555.CrossRefGoogle ScholarPubMed
Nelson, H. E. (1982). National Adult Reading Test (NART). NFER-Nelson: Windsor.Google Scholar
World Health Organization (1990). ICD-10 Draft of Chapter V: Categories F00–F99, Mental and Behavioural Disorders (including Disorders of Psychological Development). Diagnostic Criteria for Research. (WHO/MNH/MEP/87.1, Rev 4). World Health Organization, Division of Mental Health: Geneva.Google Scholar