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Published on: January 11, 2020
Measuring decision-making capacity in cognitively impaired individuals
1Department of Medicine, Institute on Aging, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. Jason.karlawish@uphs.edu
Neuro-Signals
|December 22, 2007
Summary
Individuals with Alzheimer's disease (AD) and related dementias often lose decision-making capacity alongside cognitive and functional abilities. Understanding these capacity losses is crucial for patient care and research.
Area of Science:
- Gerontology
- Neuroscience
- Cognitive Psychology
Background:
- Alzheimer's disease (AD) and related dementias cause cognitive and functional decline.
- Beyond cognitive deficits, individuals experience diminished decision-making capacity.
- Assessing decision-making capacity is vital for ethical and effective care.
Purpose of the Study:
- To review research on decision-making capacity in individuals with dementia.
- To examine the impact of cognitive impairment on understanding, appreciation, choice, and reasoning.
- To explore capacity assessment in treatment consent, research participation, and daily functioning.
Main Methods:
- Systematic review of empirical studies on decision-making capacity in dementia.
- Analysis of research focusing on the "four abilities" model: understanding, appreciation, choice, and reasoning.
- Examination of capacity related to treatment, research, and functional abilities.
Main Results:
- Identified the clinical characteristics of patients who retain capacity to consent.
- Demonstrated how cognitive impairment affects specific decision-making abilities.
- Highlighted the variability in capacity across different domains (treatment, research, daily life).
Conclusions:
- Capacity assessment is essential for understanding the full spectrum of disability in dementia.
- Measures of decision-making capacity can refine the evaluation of cognitive enhancement interventions.
- Improved capacity assessment aids in more accurate dementia staging and outcome measurement.
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