Discriminant Validity and Reliability of the Turkish Version of Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE-T)

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Ozel-Kizil E. T., Turan E. D., Yilmaz E., CANGÖZ B., ULUÇ S.

ARCHIVES OF CLINICAL NEUROPSYCHOLOGY, vol.25, no.2, pp.139-145, 2010 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 2
  • Publication Date: 2010
  • Doi Number: 10.1093/arclin/acp103
  • Journal Name: ARCHIVES OF CLINICAL NEUROPSYCHOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Scopus
  • Page Numbers: pp.139-145
  • Keywords: Dementia, IQCODE, Reliability, Validity, Cognitive functions, SCREENING-TEST, ALZHEIMERS-DISEASE, DEMENTIA, DEPRESSION, SCALE, IMPAIRMENT, PREVALENCE, VALIDATION, CHINESE, TOOL
  • Hacettepe University Affiliated: Yes

Abstract

The Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) has been used as a measure of cognitive decline in different cultures. The purpose of the study was to establish the validity and reliability of the Turkish version of IQCODE (IQCODE-T) and the ability of the questionnaire to distinguish between older adults with DSM-IV-TR dementia (n = 100) and healthy control participants (n = 60). In addition, the power of the IQCODE-T to distinguish between patients with depression and dementia was investigated. The Mini-Mental State Examination (MMSE) was performed on all participants and the IQCODE-T was administered to their informants. The IQCODE-T, which was not associated with age or education of the patients, significantly differentiated patients with dementia and controls. The IQCODE-T also correctly classified 73% of depressed patients as "non-demented". Because it is easy to administer, not associated with age/education and yields fewer false-positive results than the MMSE in depression, the IQCODE-T can be used in the detection of dementia.