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54 The Differential Impact of Genetic Moderators on the Relationship Between Depression and Cognition
- Mia L. Delgadillo, Eliza Morgan, Nesha Harper, Aidan Boese, Jennifer K Fairchild
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- Journal:
- Journal of the International Neuropsychological Society / Volume 29 / Issue s1 / November 2023
- Published online by Cambridge University Press:
- 21 December 2023, pp. 659-660
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Objective:
Depression has a well-established negative effect on cognitive functioning. Variations in the apolipoprotein e (APOE) and brain-derived neurotrophic factor (BDNF) genes likely contribute to this relationship. APOE4 and the BDNF Val66Met polymorphism are independently associated with late-life depression and cognitive dysfunction. The current study investigated the moderating effects of APOE4 and BDNFMet (i.e., the presence of the BDNF Val66Met polymorphism) on the relationship between depression and cognitive functioning in older adults.
Participants and Methods:The sample included 103 older adults drawn from two clinical trials who were recruited from the VA Palo Alto Health Care System (VAPAHCS) and the Stanford/VA Alzheimer’s Disease Center. Depression was diagnosed using the Mini Neuropsychiatric Interview for the Diagnostic and Statistical Manual of Mental Disorders-IV (DSM-IV). The presence of an APOE4 and BDNFMet allele were dichotomized (i.e., yes/no) and determined using venipuncture. A comprehensive neuropsychological battery was used to assess attention (RAVLT Trial 1, WAIS-IV DSF), processing speed (TMTA, SDMT, Stroop Word, Stroop Color), working memory (WAIS-IV DSB, DSS), visuospatial functioning (JLO), language (VNT), memory (RAVLT Delayed Recall, WMS-IV Logical Memory II), and executive function (TMTB, Stroop Color-Word). Separate moderation analyses were conducted with depression as the predictor and APOE4 or BDNFMet status as the moderator using the SPSS PROCESS macro v4.0. Age was a covariate for models with processing speed, memory, language, and executive function as outcome variables.
Results:Participants were largely male (93%) and White (75%). Ten percent met criteria for depression, 26% were APOE4 carriers, and 32% were BDNFMet carriers. The overall model examining depression, APOE4, and memory was significant (p < .01, R2 = .14). Depression was associated with lower memory performance (p < .05), however, APOE4 was not a significant moderator (p > .05). Similarly, the overall model examining depression, APOE4, and language was also significant (p < .05, R2 = .10). While the direct effects of depression and APOE4 on language were nonsignificant (p > .05), there was a significant two-way interaction between APOE4 and depression (p = .03). The overall model with depression, BDNFMet, and memory was significant (p < .001, R2 = .18). While neither depression nor BDNFMet had significant direct effects on memory (p > .05), a two-way interaction emerged between depression and BDNFMet (p = .05). Simple slopes analyses were used to further investigate significant interactions. Depression, APOE4, and BDNFMet did not significantly impact attention, processing speed, working memory, visuospatial functioning, or executive function, and no significant interactions were noted among variables. BDNFMet had no direct impact on language.
Conclusions:APOE4 and BDNFMet were found to differentially moderate the relationship between depression and cognition. Specifically, APOE4 carriers with depression had worse language performance compared to those who were healthy, depressed, or APOE4 carriers. BDNFMet carriers with depression performed worse on measures of memory compared to those who were healthy, depressed, or BDNFMet carriers. The treatment of depression in APOE4 and BDNFMet carriers may reduce associated cognitive impairments. Limitations and future implications are also discussed.
95 Fear of Falling Associated with Decreased Attention and Executive Functioning in Caregivers
- Sheila M Thompson, Eliza Morgan, J Kaci Fairchild
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- Journal:
- Journal of the International Neuropsychological Society / Volume 29 / Issue s1 / November 2023
- Published online by Cambridge University Press:
- 21 December 2023, pp. 395-396
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Objective:
Fear of falling is an anxiety-related phenomenon that is associated with increased risk of morbidity and mortality in older adults. Furthermore, a growing body of research has established the relationship between fear of falling and decreased cognitive functioning within various populations (i.e., older adult, multiple sclerosis, stroke survivors). Yet there is little information on the relationship between fear of falling and cognition outside of a geriatric context, with no publications investigating this relationship within informal caregivers. It is important to understand this relationship within caregiver populations because fear of falling may negatively impact caregivers’ ability to take care of themselves and their care recipients. The present study examines the relationship between fear of falling and cognitive function in informal caregivers.
Participants and Methods:Fifty informal caregivers (86% female; 58% White; 10% Hispanic or Latino; 82% married; 53% with at least a bachelor’s degree; mean age = 57.76 ± 16.60 years) were assessed at the VA Palo Alto Health Care System in Palo Alto, CA. Fear of falling was measured via the Short Falls Efficacy Scale. Areas of cognitive functioning included verbal attention (Rey Auditory Verbal Learning Task [RAVLT] Trial 1), learning and memory (RAVLT Trials 1-5), delayed memory (RAVLT Delayed Recall), visual attention (Stroop Color, Stroop Word), and executive function (Stroop Color Word). Analyses included linear regressions with age as a covariate in all models.
Results:Analyses revealed that fear of falling was significantly associated with decreased verbal attention (RAVLT Trial 1: ß=-0.34, p = 0.02, t = -2.35, CI = [-0.659, -0.051]) and with decreased executive functioning (Stroop Color Word: ß = -0.35, p < 0.001, t = -3.10, CI = [-4.097, -0.874]). Fear of falling was not significantly associated with learning and memory or visual attention.
Conclusions:Fear of falling negatively impacts verbal attention and executive functioning, regardless of age. To our knowledge, this is the first study to examine the relationship between fear of falling and cognition outside of a geriatric population and within a caregiver sample. Findings suggest a need for additional assessment, research, and treatment of fear of falling within informal caregivers. Caregivers may need to be assessed for anxiety-related symptoms such as fear of falling on a more regular basis. A caregiver experiencing fear of falling, as well as difficulties with attention and executive functioning, can result in increased risk of functional and cognitive decline for both the caregiver and their care recipient. It is integral that future research investigates this relationship longitudinally to identify if the negative impact of fear of falling on cognition is reversible.
14 The Impact of Visual Attention and Impulsivity on Disinhibited Eating Behaviors in Older Adults
- Eliza Morgan, Nesha Harper, Adriana Savettiere, Sheila Mae Thompson, J. Kaci Fairchild
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- Journal:
- Journal of the International Neuropsychological Society / Volume 29 / Issue s1 / November 2023
- Published online by Cambridge University Press:
- 21 December 2023, p. 328
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Objective:
Although the relationship between visual attention, impulsivity, and cognitively restrained eating patterns has been established in previous research, less is known about the relationship of cognitive processes and disinhibited eating patterns in older adults. Research postulates that disinhibited eating behaviors may be associated with stress, limited emotional capacity, anxiety, and impulsivity. The current study investigated impulsivity as a potential mediator of the relationship between visual attention and disinhibited eating in older veterans.
Participants and Methods:This study included 101 Veterans who were screened as part of a larger study assessing the impact of multi-modal activity-based interventions on brain health in older adulthood. The sample included largely White (76%), male (94%) Veterans aged 54 to 88 (M = 70.1, SD 8.9). The Three-Factor Eating Questionnaire was used to assess daily disinhibited eating patterns, and attentional impulsivity was assessed with the Barratt Impulsiveness Scale. Visual attention was evaluated using the Stroop Color Word Test (Color Trial). Mediation analyses were conducted using the SPSS PROCESS Macro. The outcome variable for analysis was disinhibited eating. The predictor variable was visual attention. The mediator variable was impulsivity. Body mass index (BMI) was included as a covariate as it was significantly associated with the predictor and outcome variables.
Results:The indirect effect of visual attention on disinhibited eating was found to be statistically significant (effect = 0.06, 95%: 0.02, 0.12)
Conclusions:Attentional impulsivity appears to mediate the relationship between visual attention and disinhibited eating behaviors. This finding extends the current literature about the relationship between visual attention, impulsivity, and other eating patterns (e.g., cognitively restrained eating) in older adults. Exploring this relationship helps us better understand the impact of eating habits through the aging process. Caregivers and older adults should be informed about the impact of increased impulsivity on disinhibited eating behaviors, especially in those with limited visual attention processes. Further understanding of the neurobiological impact of eating behaviors on cognition in older adulthood may assist in developing awareness about the importance of healthy eating patterns when considering brain health in the aging process.