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Development and application of the extended scale for dementia.
Journal of the American Geriatrics Society
|August 1, 1979
Summary
Researchers developed the Extended Scale for Dementia to assess cognitive decline. This new dementia scale effectively differentiates dementia patients and tracks disease progression over time.
Area of Science:
- Psychology
- Geriatrics
- Neurology
Background:
- Organic dementia assessment requires reliable psychometric tools.
- Existing scales may need refinement for improved diagnostic accuracy.
- The Mattis Dementia Scale is a foundational tool for dementia evaluation.
Purpose of the Study:
- To develop and validate the Extended Scale for Dementia (ESD).
- To enhance the assessment of dementia severity using a psychologic test.
- To improve the discrimination between dementia and non-dementia patient groups.
Main Methods:
- Expansion and rescoring of the original Mattis Dementia Scale.
- Statistical analysis of 23 test items with item weighting.
- Administration of the ESD to 90 psychogeriatric inpatients across 6 London, Ontario hospitals.
Main Results:
- The ESD successfully discriminated between dementia and non-dementia groups.
- ESD scores showed a significant decline in dementia patients over 6 and 12 months.
- ESD findings correlated closely with the London Psychogeriatric Rating Scale.
- No significant differences in scores were found between genders or dementia subtypes (Alzheimer vs. multi-infarct).
Conclusions:
- The Extended Scale for Dementia is a valid and reliable tool for assessing dementia severity.
- The ESD can track cognitive decline in dementia patients over time.
- The scale demonstrates utility in differentiating dementia from non-dementia conditions in clinical settings.