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Printed on 4/21/2026
For informational purposes only. This is not medical advice.
IQCODE-26 is an informant questionnaire that evaluates perceived cognitive change over time in an older adult. The mean item score reflects degree of decline, with higher scores indicating greater concern.
Formula: IQCODE-26 score = mean of 26 item ratings, range 1.0-5.0.
IQCODE long forms have longstanding validation for dementia screening support across diverse settings.
Higher IQCODE-26 means indicate greater informant-reported cognitive decline and support further evaluation.
Use when a reliable informant is available and longitudinal cognitive-change perspective is needed.
Results depend on informant accuracy, patient-contact frequency, and contextual bias.
For related assessments, see IQCODE-16, AD8 Screen and ECog-12.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
Estimate informant-reported cognitive decline using the short 16-item IQCODE mean score.
GeriatricsScreen for cognitive impairment using the 8-item AD8 informant interview (score 0-8).
GeriatricsInformant-rated everyday cognition decline scale summarized by mean score across 12 items.
GeriatricsA 30-point cognitive screen designed for culturally and linguistically diverse populations.