Dementia Care Research and Psychosocial Factors

Area of Science:

• Neuroscience
• Gerontology
• Public Health

Background:

• Mild Cognitive Impairment (MCI) is a pre-dementia state characterized by cognitive and motor deficits.
• Lifestyle interventions like aerobic exercise (AE) and cognitive training (CT) show promise in improving function in individuals with MCI.
• Modifiable risk factors, addressed early in life, can potentially mitigate dementia cases.

Purpose of the Study:

• To investigate life history factors contributing to Cognitive Reserve (CR) and Motor Reserve (MR).
• To determine if CR and MR predict baseline cognition and mobility.
• To examine the influence of CR and MR on responsiveness to multi-domain lifestyle interventions for MCI.

Main Methods:

• Secondary data analysis of older adults with MCI (n=71) randomized into CT+AE, AE only, or control groups.
• Principal Component Analysis (PCA) used to derive CR and MR factors from life history data.
• Linear regressions and Linear Mixed-Effects (LME) models employed to assess baseline outcomes and intervention effects.

Main Results:

• A larger sample (n=266) identified MR (lifelong physical activity) and CR (education, occupational complexity) as key components.
• MR was significantly associated with improved baseline dual-task walking velocity and Trail-Making Test performance.
• CR did not predict baseline cognitive or motor performance in this analysis.

Conclusions:

• Motor Reserve (MR) demonstrates a significant association with baseline cognitive and motor performance in individuals with MCI.
• Further analysis using LME models is needed to ascertain the impact of MR and CR on intervention responsiveness.
• MR appears more sensitive in detecting baseline cognitive and motor benefits, suggesting potential for personalized MCI interventions.