Can a direct IADL measure detect deficits in persons with MCI?
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Published on: October 13, 2016
Dani L Binegar1, Linda S Hynan, Laura H Lacritz
1Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9129, USA.
Objective:
To determine if a direct measure of instrumental activities of daily living (IADL) scale designed for use with dementia patients can detect differences between persons with mild cognitive impairment (MCI) and normal elderly control subjects (NC).
Methods:
This study used cross-sectional and longitudinal IADL scale data from MCI and NC subjects followed at an Alzheimer's Disease Center.
Results:
On a 52-point scale, MCI subjects (n = 30) scored significantly lower than NC subjects (n = 30) on the IADL scale (total score 47.17 vs. 48.77 points; t (58) = 2.34, p = .011) and its Memory subscale (5.27 vs. 6.6 points; t (58) = 3.29, p = .002).Examination of annualized IADL scale change scores revealed that 50% of MCI subjects had declined by one point, compared with 29% of NC.
Conclusion:
A direct IADL measure for dementia patients is able to detect small differences between MCI and NC and cross-sectionally and longitudinally, but does not distinguish between groups.
Insights
A direct measure of instrumental activities of daily living (IADL) scale can detect differences between individuals with mild cognitive impairment (MCI) and normal elderly controls (NC). However, it does not distinguish between these groups.
Area of Science:
- Gerontology
- Neuroscience
- Clinical Psychology
Background:
- Mild cognitive impairment (MCI) is a transitional stage between normal aging and dementia.
- Accurate assessment tools are crucial for early detection and intervention in cognitive decline.
Purpose of the Study:
- To evaluate the efficacy of a direct instrumental activities of daily living (IADL) scale in differentiating individuals with MCI from normal elderly controls (NC).
- To assess the scale's ability to detect changes both cross-sectionally and longitudinally.
Main Methods:
- Utilized cross-sectional and longitudinal IADL scale data from subjects diagnosed with MCI and NC.
- Data was collected from participants followed at an Alzheimer's Disease Center.
Main Results:
- MCI subjects (n=30) scored significantly lower on the total IADL scale (47.17 vs. 48.77) and the Memory subscale (5.27 vs. 6.6) compared to NC subjects (n=30).
- Longitudinal analysis indicated that 50% of MCI subjects experienced a one-point decline in IADL scores annually, versus 29% of NC subjects.
Conclusions:
- The direct IADL scale can identify subtle differences between MCI and NC groups.
- The scale demonstrates utility in detecting cognitive changes over time, both cross-sectionally and longitudinally.
- Despite detecting differences, the scale did not definitively distinguish between the MCI and NC groups in this study.
