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Printed on 4/21/2026
For informational purposes only. This is not medical advice.
IQCODE-16 is an informant-based questionnaire that asks how an older adult’s cognition has changed over time relative to prior baseline. Each of 16 items is scored 1 to 5 (much improved to much worse). The mean score (total/16) is used for interpretation, with higher means indicating greater decline.
Formula: Mean IQCODE-16 score = total score / 16 (total range 16-80; mean range 1.0-5.0).
The 16-item IQCODE performs similarly to the original long form in validation studies, and common screening thresholds cluster around mean 3.3-3.6 depending on setting.
Higher IQCODE means indicate greater informant-reported cognitive decline and support further structured dementia workup.
Use when a reliable informant is available and longitudinal decline is the key question in cognitive screening.
Results depend on informant reliability and recall, and may be influenced by mood, stress, and observer bias.
For related assessments, see CDR Global, Reisberg GDS and SLUMS Score.
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.
Classify dementia severity with the Clinical Dementia Rating global stage (0, 0.5, 1, 2, 3).
GeriatricsStage overall cognitive decline with the 7-level Global Deterioration Scale (GDS) from no decline to very severe dementia.
GeriatricsClassify SLUMS cognitive-screen totals (0-30) to support triage for fuller neurocognitive evaluation.
Mental HealthInterpret Montreal Cognitive Assessment (MoCA) scores. The leading cognitive screening tool for mild cognitive impairment and dementia.