Clinical Manifestations

Area of Science:

• Neuroscience
• Gerontology
• Psychiatry

Background:

• Mild Behavior Impairment (MBI) and Subjective Cognitive Decline (SCD) are common in mid-to-late life and may precede dementia.
• Combined MBI and SCD may increase dementia conversion risk more than either condition alone.
• This study investigated the effects of MBI and SCD on cognitive performance in a young, cognitively healthy sample.

Purpose of the Study:

• To explore the impact of Mild Behavior Impairment (MBI) and Subjective Cognitive Decline (SCD) on cognitive performance.
• To assess cognitive outcomes in a cohort of cognitively unimpaired middle-aged adults.
• To determine if the combination of MBI and SCD has a differential effect on cognition over time.

Main Methods:

• Utilized data from 309 cognitively unimpaired participants at the Wisconsin Alzheimer's Disease Research Center.
• Defined MBI via the Neuropsychiatric Inventory Questionnaire and SCD by self-reported memory concerns.
• Employed linear mixed effects models to analyze the association between MBI/SCD groups and cognitive test results (Rey Auditory Verbal Learning Test, Trail Making Tests).

Main Results:

• Participants with SCD were more likely to meet MBI criteria (p = .001).
• The MBI+/SCD+ group showed poorer immediate recall performance.
• MBI, with or without SCD, was associated with poorer performance on Trails A and B (executive function measures).

Conclusions:

• Mild Behavior Impairment (MBI) may serve as an early indicator of executive function deficits in middle age.
• The presence of both MBI and Subjective Cognitive Decline (SCD) appears to be associated with impaired memory.
• Further research is warranted to explore underlying pathologies associated with these conditions.