Applicability of a cognitive questionnaire in the elderly and proxy

Area of Science:

• Gerontology
• Cognitive Science
• Psychometrics

Background:

• Cognitive decline screening tools are essential for early intervention in the elderly.
• The Informant Questionnaire on Cognitive Decline in the Elderly with the Proxy (IQCODE) is a validated screening tool.
• Limited schooling can impact the applicability of cognitive assessments.

Purpose of the Study:

• To assess the applicability of the IQCODE in elderly individuals with limited formal education.
• To evaluate the reliability of cognitive decline reports from both the elderly and their proxies.
• To compare the accuracy of self-reported versus proxy-reported IQCODE data against established cognitive measures.

Main Methods:

• The study involved 44 community-dwelling elderly individuals (aged 58-82) and their proxies.
• Participants completed the Mini-Mental State Examination (MMSE), IQCODE, and Geriatric Depression Scale (GDS).
• The IQCODE was administered to both the elderly participants and their designated proxies.

Main Results:

• No statistical difference was found between elderly self-reported IQCODE scores and proxy-reported scores.
• Elderly individuals with scores below the MMSE cut-off showed more congruent IQCODE answers with MMSE results compared to proxy reports.
• Depressive symptoms were present in 13 participants, as indicated by the Geriatric Depression Scale.

Conclusions:

• The IQCODE is applicable for screening cognitive alterations in elderly populations with limited schooling.
• Elderly self-reports on the IQCODE demonstrated higher accuracy compared to proxy reports when correlated with MMSE scores.
• Further research with larger, community-dwelling cohorts is recommended to confirm these findings.