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

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

ARCHIVES OF CLINICAL NEUROPSYCHOLOGY, cilt.25, sa.2, ss.139-145, 2010 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Konu: 2
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1093/arclin/acp103
  • Sayfa Sayıları: ss.139-145


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.