Robust and Expanded Norms for the Dementia Rating Scale

The Dementia Rating Scale (DRS) is a widely used measure of global cognition, with age- and education-corrected norms derived from a cross-sectional sample of adults participating in Mayo's Older Americans Normative Studies (MOANS). In recent years, however, studies have indicated that cross-se...

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Bibliographic Details
Published in:Archives of clinical neuropsychology 2010-08, Vol.25 (5), p.347-358
Main Authors: Pedraza, Otto, Lucas, John A., Smith, Glenn E., Petersen, Ronald C., Graff-Radford, Neill R., Ivnik, Robert J.
Format: Article
Language:English
Subjects:
Adult and adolescent clinical studies
Age Factors
Aged
Aged, 80 and over
Alzheimer's disease
Biological and medical sciences
Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases
Dementia - diagnosis
Dementia - psychology
Dementia Rating Scale
DRS
Female
Follow-Up Studies
Geriatric Assessment
Humans
Male
Medical sciences
Neurology
Neuropsychological Tests - standards
Norms
Organic mental disorders. Neuropsychology
Original Empirical
Psychiatric Status Rating Scales - standards
Psychology. Psychoanalysis. Psychiatry
Psychometrics. Diagnostic aid systems
Psychopathology. Psychiatry
Reference Values
Residence Characteristics
Retrospective Studies
Robust
Statistics as Topic
Techniques and methods
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Summary:The Dementia Rating Scale (DRS) is a widely used measure of global cognition, with age- and education-corrected norms derived from a cross-sectional sample of adults participating in Mayo's Older Americans Normative Studies (MOANS). In recent years, however, studies have indicated that cross-sectional normative samples of older adults represent an admixture of individuals who are indeed cognitively normal (i.e., disease-free) and individuals with incipient neurodegenerative disease. Theoretically, the “contamination” of cross-sectional normative samples with cases of preclinical dementia can lead to underestimation of the test mean and overestimation of the variance, thus reducing the clinical utility of the norms. Robust norming, in which dementia cases are removed from the normative cohort through longitudinal follow-up, is an alternative approach to norm development. The current study presents a reappraisal of the original MOANS DRS norms, provides robust and expanded norms based on a sample of 894 adults age 55 and over, and critically evaluates the benefits of robust norming.
ISSN:0887-6177
1873-5843
DOI:10.1093/arclin/acq030