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Printed on 4/21/2026
For informational purposes only. This is not medical advice.
The Clinical Dementia Rating (CDR) is a clinician-rated staging system that integrates cognitive and functional information across core domains to estimate dementia severity. Global CDR stages are 0 (none), 0.5 (questionable), 1 (mild), 2 (moderate), and 3 (severe).
Formula: Global stage classification: 0, 0.5, 1, 2, or 3 (non-additive stage scale).
CDR is an extensively used dementia staging framework in clinical care and research, especially for Alzheimer's disease severity stratification.
Higher CDR stages indicate greater dementia severity and increasing dependence on support for daily functioning.
Use in dementia evaluation and follow-up to communicate overall severity and guide prognosis, care planning, and resource allocation.
CDR depends on structured clinician judgment and collateral history quality; cross-rater consistency and context are important.
For related assessments, see FAST Dementia, SLUMS Score and MoCA 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 functional dementia progression using FAST stages 1 through 7f.
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.
Mental HealthInterpret Mini-Mental State Examination (MMSE) scores. The classic cognitive screening test for dementia, scoring 0–30.