A Multi-method Investigation of the Personality Correlates of Functional Ability in Older Adults.

OBJECTIVES: This study evaluated the role of personality in predicting functional ability (FA) in older adults using self-report, collateral report, and performance-based measures of FA. METHODS: Participants included older adults (N = 131) who completed a personality measure (NEO-FFI), a self-report of FA (OARS ADL), and participated in a performance-based assessment of FA (DAFS-R). In addition, each participant had a collateral complete a collateral report of FA (OARS ADL). Bivariate correlations were computed to assess how Five Factor Model traits were related to self-report, collateral, and performance-based measures of FA. RESULTS: Neuroticism was negatively related to self-reported FA (r = - .27) and collateral-reported FA (r = - .18) and Conscientiousness was positively related to self-reported FA (r = .25). None of the traits were significantly related to the performance-based measure of FA. CONCLUSIONS: These results suggest that personality traits can impact self-reported FA in older adults and underscore the importance of assessing FA in older adults using multiple methods, particularly performance-based measures. CLINICAL IMPLICATIONS: Clinicians should consider how personality may impact FA in older adults and multiple methods of FA performance should be examined to better tailor recommendations.

Coach, sports medicine, and parent influence on concussion care seeking intentions and behaviors in collegiate student-athletes.

BACKGROUND: Sport is a socio-ecological framework where student-athletes are part of a larger community of stakeholders, including coaches, sports medicine professionals (SMPs), and parents. This framework may hold influence over whether student-athletes seek care for a concussion. AIM: We aimed to describe, compare, and determine the influence of stakeholder concussion knowledge, attitudes, and concussion scenario responses. MATERIALS AND METHODS: We recruited a sample of 477 student-athletes and their 27 coaches (response rate=46.6%), 24 SMPs (48.7%), and 31 parents/guardians (4.8%). Stakeholder surveys assessed their concussion knowledge, attitudes toward care seeking, and concussion scenario responses. Surveys administered to student-athletes assessed their concussion care seeking intentions and behaviors. Kruskal-Wallis tests were used to compare responses between stakeholder groups and to determine the differences in student-athlete intentions and behaviors (alpha=0.05). RESULTS: SMPs had significantly better knowledge (p<0.001) and concussion scenario responses (p<0.001) compared to both coaches and parents. SMPs also had significantly better attitudes compared to parents, but not coaches (p=0.038). Coach concussion scenario responses (p=0.044) and SMP knowledge positively influenced student-athletes' concussion care seeking intentions (p=0.049). Parent responses were not associated with their child's concussion care seeking intentions and behaviors. CONCLUSIONS: The gap in coach and parent concussion knowledge and concussion scenario response relative to SMPs is a preliminary target for stakeholder concussion education and supports the current sports medicine model where SMPs primarily disseminate concussion education. Stakeholders, specifically coaches and SMPs, do hold influence over collegiate athlete concussion care seeking intentions and behaviors. RELEVANCE FOR PATIENTS: Stakeholders should be addressed within educational efforts aimed at student-athletes and should also complete stakeholder-specific concussion education.

Lutein and Zeaxanthin Are Positively Associated with Visual-Spatial Functioning in Older Adults: An fMRI Study.

Lutein (L) and zeaxanthin (Z) are two xanthophyll carotenoids that have antioxidant and anti-inflammatory properties. Previous work has demonstrated their importance for eye health and preventing diseases such as age-related macular degeneration. An emerging literature base has also demonstrated the importance of L and Z in cognition, neural structure, and neural efficiency. The present study aimed to better understand the mechanisms by which L and Z relate to cognition, in particular, visual-spatial processing and decision-making in older adults. We hypothesized that markers of higher levels of L and Z would be associated with better neural efficiency during a visual-spatial processing task. L and Z were assessed via standard measurement of blood serum and retinal concentrations. Visual-spatial processing and decision-making were assessed via a judgment of line orientation task (JLO) completed during a functional magnetic resonance imaging (fMRI) scan. The results demonstrated that individuals with higher concentrations of L and Z showed a decreased blood-oxygen-level dependent (BOLD) signal during task performance (i.e., "neural efficiency") in key areas associated with visual-spatial perception, processing, decision-making, and motor coordination, including the lateral occipital cortex, occipital pole, superior and middle temporal gyri, superior parietal lobule, superior and middle frontal gyri, and pre- and post-central gyri. To our knowledge, this is the first investigation of the relationship of L and Z to visual-spatial processing at a neural level using in vivo methodology. Our findings suggest that L and Z may impact brain health and cognition in older adults by enhancing neurobiological efficiency in a variety of regions that support visual perception and decision-making.

Cognitive reserve moderates relation between global cognition and functional status in older adults.

The ability to perform instrumental activities of daily living (IADLs) is necessary for independent living. Research suggests that community-dwelling older adults are at risk for experiencing subtle decrements in the performance of IADLs. Neuropsychological tests have been used to account for differences in IADL status. Studies of the relationship between cognitive ability and functional status have produced variable results, however, and cognitive ability appears to be only a moderate predictor. Several studies of normal aging have revealed cognitive and functional benefits of higher cognitive reserve (CR) in healthy, nondemented older adults. The purposes of the present study were to: (a) examine the relationship between global cognitive ability and IADL performance among 53 community-dwelling older adults, and (b) determine whether formal education, as a proxy of CR, significantly moderates this relationship. Consistent with previous findings, global cognitive ability accounted for a considerable portion of variance in IADL performance [ΔR(2) = .54; ΔF(2, 53) = 67.96; p < .001]. Additionally, CR modestly but significantly attenuated this relationship [ΔR(2) = .044; ΔF(4, 53) = 5.98; p = .018; total R(2) = .65]. This finding suggests that community-dwelling older adults with lower levels of formal education may be at greater risk for functional decrements associated with age-related cognitive decline.

Sources of variation on the mini-mental state examination in a population-based sample of centenarians.

Centenarians represent a rare but rapidly growing segment of the oldest-old. This study presents item-level data from the Mini-Mental State Examination (MMSE) in a cross-sectional, population-based sample of 244 centenarians and near-centenarians (aged 98-108, 16% men, 21% African-American, 38% community dwelling) from the Georgia Centenarian Study (2001-2008) according to age, education, sex, race, and residential status. Multiple-Indicator Multiple-Cause (MIMIC) models were used to identify systematic domain-level differences in MMSE scores according to demographic characteristics in this age group. Indirect effects of age, educational attainment, race, and residential status were found on MMSE scores. Direct effects were limited to concentration for education and race and orientation for residential status. Mean levels of cognitive functioning in centenarians were low, with mean values below most commonly-used cutoffs. Overall scores on the MMSE differed as a function of age, education, race, and residential status, with differences in scale performance limited primarily to concentration and orientation and no evidence of interactions between centenarian characteristics. Adjusting for education was not sufficient to account for differences according to race, and adjusting for residential status was not sufficient to account for differences according to age.