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Printed on 4/21/2026
For informational purposes only. This is not medical advice.
The Quick Dementia Rating System (QDRS) is an informant-completed scale that captures cognitive, behavioral, and functional changes to provide rapid dementia severity staging context. It is useful in clinic workflows where brief caregiver-informed assessment is needed.
Formula: QDRS total is a summed informant-rated score, range 0-30.
QDRS has published validation as a brief informant-based dementia severity tool.
Higher QDRS totals indicate greater severity signal and support intensified cognitive-functional follow-up.
Use when informant input is available and rapid dementia severity context is needed.
Depends on informant reliability and may be influenced by caregiver stress or limited contact.
For related assessments, see IQCODE-26, 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.
A 26-item informant-based cognitive decline screen summarized as a 1.0-5.0 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.
GeriatricsClassify dementia severity with the Clinical Dementia Rating global stage (0, 0.5, 1, 2, 3).