Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    Clinical Dementia Rating (CDR) Scale

    Stages dementia, including Alzheimer's, in elderly patients.
    When to Use

    Do you use the Clinical Dementia Rating (CDR) Scale and want to contribute your expertise? Join our contributor team!

    No memory loss or slight inconsistent forgetfulness (0)
    Mild consistent forgetfulness; partial recollection of events; "benign" forgetfulness (0.5)
    Moderate memory loss; more marked for recent events; interferes with everyday activities (1)
    Severe memory loss; only highly learned material retained; new material rapidly lost (2)
    Severe memory loss; only fragments remain (3)
    Fully oriented (0)
    Fully oriented except for slight difficulty with time relationships (0.5)
    Moderate difficulty with time relationships; oriented for place and person at examination but may have geographic disorientation (1)
    Severe difficulty with time relationships; usually disoriented to time, often to place (2)
    Oriented to person only (3)
    Solves everyday problems well; judgment good in relation to past performance (0)
    Slight impairment in solving problems, similarities, and differences (0.5)
    Moderate difficulty in handling complex problems; social judgment usually maintained (1)
    Severely impaired in handling problems, similarities, and differences; social judgment usually impaired (2)
    Unable to make judgments or solve problems (3)
    Independent function at usual level in job, shopping, business, and financial affairs, volunteer and social groups (0)
    Slight impairment in these activities (0.5)
    Unable to function independently at these activities although may still be engaged in some; appears normal to casual inspection (1)
    No pretense of independent function outside home; appears well enough to be taken to functions outside a family home (2)
    No pretense of independent function outside home; appears too ill to be taken to functions outside a family home (3)
    Life at home, hobbies, and intellectual interests well maintained (0)
    Life at home, hobbies, and intellectual interests slightly impaired (0.5)
    Mild but definite impairment of function at home; more difficult chores abandoned; more complicated hobbies and interests abandoned (1)
    Only simple chores preserved; very restricted interests, poorly maintained (2)
    No significant function in home (3)
    Fully capable of self-care (0)
    Needs prompting (1)
    Requires assistance in dressing, hygiene, keeping of personal effects (2)
    Requires much help with personal care; frequent incontinence (3)


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    Creator Insights
    Dr. Charles P. Hughes

    About the Creator

    Charles P. Hughes, MD, (d. 2018) was the chief of staff of Erlanger Medical Center in Chattanooga, Tennessee. He also served as a faculty member at the University of Tennessee College of Medicine. Dr. Hughes’ primary research interests included Alzheimer’s disease and dementia.

    To view Dr. Charles P. Hughes's publications, visit PubMed