title: Discriminant validity and reliability of the Turkish version of Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE-T).
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.
authors.affiliation: Department of Psychiatry, Ankara University School of Medicine, Ankara, Turkey. etozel@medicine.ankara.edu.tr
authors.forename: E Tugba
authors.initials: ET
authors.lastname: Ozel-Kizil
authors.forename: Engin D
authors.initials: ED
authors.lastname: Turan
authors.forename: Elif
authors.initials: E
authors.lastname: Yilmaz
authors.forename: Banu
authors.initials: B
authors.lastname: Cangoz
authors.forename: Sait
authors.initials: S
authors.lastname: Uluc
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000523:psychology*; D003071:Cognition; D003072:Cognition Disorders / Q000175:diagnosis* / Q000523:psychology; D003704:Dementia / Q000175:diagnosis; D003863:Depression / Q000175:diagnosis; D003937:Diagnosis, Differential; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D014421:Turkey