Executive function and negative eating behaviors in severely obese African Americans.

OBJECTIVE: African Americans are disparately impacted by severe obesity. Low socioeconomic status and psychosocial risk factors help to explain this disparity; however, few studies have examined the role of negative eating behaviors or the influence of executive function on negative eating behaviors in this population. The objective was to examine the association between executive function (ie, inhibition and set shifting) and negative eating behaviors in severely obese African Americans. PARTICIPANTS: Forty-seven African Americans who met criteria for severe obesity participated. DESIGN AND SETTING: Data were analyzed from a cross-sectional study entitled Stress and Psychoneuroimmunological Factors in Renal Health and Disease. The mean age of participants was 45.7 years (SD = 10.8) and the mean educational attainment was 13 years (SD = 2.1). MAIN OUTCOME MEASURES: Participants completed the Wisconsin Card Sorting Task, the Stroop Color-Word Test, and the Eating Behavior Patterns Questionnaire. RESULTS: Correlation results suggested poorer inhibition was associated with greater self-reported emotional eating and snacking on sweets. Subsequent hierarchical regression analyses confirmed the inverse relations between inhibition, emotional eating, and snacking on sweets, after controlling for age, sex, years of education, and depression. CONCLUSIONS: Reduced inhibition may be an important risk factor for negative eating behaviors and subsequent obesity in this population. Interventions aimed at increasing inhibition and self-regulation in this at-risk group are warranted.

Distinct functions of social support and cognitive function among older adults.

UNLABELLED: BACKGROUND/STUDY CONTEXT: Social support has been shown to buffer cognitive decline in older adults; however, few studies have examined the association of distinct functions of perceived social support and cognitive function. The current study examined the relations between distinct functions of social support and numerous cognitive domains in older adults. METHODS: Data were derived from a cross-sectional, correlational study of cardiovascular risk factors, cognitive function, and neuroimaging. The participants were 175 older adults with a mean age of 66.32. A number of neuropsychological tests and the Interpersonal Support Evaluation List were administered. Multiple linear regression analyses were conducted to determine cross-sectional relations of social support to cognitive function after controlling for age, gender, education, depressive symptomatology, systolic blood pressure, body mass index, total cholesterol, and fasting glucose. RESULTS: No significant positive relations were found between distinct functions of social support and cognitive function in any domain; however, inverse relations emerged such that greater social support across several functions was associated with poorer nonverbal memory and response inhibition. CONCLUSION: Results suggest that the receipt of social support may be a burden for some older adults. Within the current study, fluid cognitive abilities reflected this phenomenon. The mechanism through which social support is associated with poorer cognitive function in some domains deserves further exploration.

Dispositional depression and hostility are associated with inflammatory markers of cardiovascular disease in African Americans.

Prior research has demonstrated that state depressive symptoms and hostility can modulate inflammatory immune responses and directly contribute to cardiovascular disease (CVD) onset and development. Previous studies have not considered the contribution of dispositional depressive symptoms to the inflammatory process. They have also largely excluded African Americans, despite their disproportionate risk for CVD. The first aim of the study was to examine the impact of state and dispositional depression and hostility on CVD-associated inflammatory biomarkers interleukin-6 (IL-6) and C-reactive protein (CRP) in an African American sample. The second aim was to examine synergistic influences of hostility and state and dispositional depression on IL-6 and CRP. The final aim was to examine whether the relations between state and dispositional depression, hostility, IL-6, and CRP varied as a function of gender and education. Anthropometric measures, blood serum samples, and psychosocial data were collected from 198 African Americans from the Washington, DC metropolitan area. Hierarchical and stepwise regression analyses indicated that (1) increased levels of hostility were associated with increased levels of CRP; (2) hostility and IL-6 were more strongly associated among participants with lower educational attainment; and (3) dispositional depression and CRP were more strongly associated among participants with greater hostility and lower educational attainment. Findings suggest that enduring personality dispositions, such as dispositional depression and hostility, are critical to a thorough assessment of cardiovascular profiles in African Americans. Future studies should investigate causal pathways that link depressive and hostile personality styles to inflammatory activity for African American men and women.

Psychometric properties of the Cook Medley hostility scale and its association with inflammatory markers in African Americans.

Dispositional hostility as measured by the Cook Medley Hostility (Ho) Scale has been associated with inflammation and cardiovascular disease (CVD) risk. There is evidence that suggests that factors of hostility are more useful in predicting poor cardiovascular health outcomes than a single hostility construct. The purpose of this study was to investigate the latent factors of hostility and their association with inflammatory markers interleukin-6 (IL-6) and C-reactive protein (CRP) in an African-American community sample. This racial/ethnic group has been largely excluded from this line of research despite their disproportionate burden of CVD and its risk factors. Blood samples for plasma IL-6 and CRP were collected on the same day the Ho Scale was administered. Plasma IL-6 and CRP levels were determined using enzymatic-linked immunosorbent assay. Confirmatory factor analysis revealed three latent main factors of hostility: Neuroticism, Manichaeism and Moral Primitiveness, and seven intermediary subfactors. Of the subfactors, hostile affect was significantly associated with greater CRP levels and predatory self interest was significantly associated with greater IL-6 levels. Findings suggest that African Americans have a unique pattern of hostility and two latent subfactors are associated with a marker of CVD. Based on the findings, future studies should aim to further delineate how hostility influences health outcomes in African Americans.

The influence of coping with perceived racism and stress on lipid levels in African Americans.

BACKGROUND: Lipid dysregulation is a major contributor to cardiovascular disease (CVD) risk and is attributed to numerous biological, psychosocial, and behavioral risk factors. Psychological stress has been examined as a predictor of lipid dysregulation; however, the role of coping with perceived racism, a stressor unique to the African American experience, has not been addressed. The current study sought to determine the impact of behavioral coping responses to perceived racism and perceived daily stress on lipid levels in African Americans. METHODS: The sample consisted of 122 African American participants who resided in the Washington, DC, metropolitan area. Data were collected as part of an ongoing study entitled Stress and Psychoneuroimmunological Factors in Renal Health and Disease at Howard University Hospital. RESULTS: Through canonical analysis, distinct profiles of African American lipid function emerged with body mass index, age, and behavioral coping responses to perceived racism being associated with high-density lipoprotein cholesterol (HDL-C), triglycerides, and low-density lipoprotein cholesterol (LDL-C), respectively. Results from linear regression analyses showed that greater endorsement of behavioral coping responses to perceived racism items predicted higher levels of LDL (B = .24, p < .05). This relationship was not mediated by pathophysiological mechanisms associated with the stress response system such as cortisol, norepinephrine, epinephrine, and IL-6. CONCLUSION: The relationship between elevated levels of LDL and behavioral coping responses to perceived racism suggests that African Americans may be at increased risk for CVD due to the unique stress encountered by racism in our culture. Behavioral pathways used to counteract the negative effects of perceived discrimination may better explain this relationship. Further research is necessary to determine other biobehavioral and pathophysiological mechanisms that explain this relationship.

Coping with perceived racism: a significant factor in the development of obesity in African American women?

BACKGROUND: African American women have the highest rates of obesity in the United States. The prevalence of obesity in this group calls for the identification of psychosocial factors that increase risk. Psychological stress has been associated with obesity in women; however, there is scant literature that has explored the impact of racism on body mass index (BMI) in African American women. OBJECTIVE: The current study aimed to determine whether emotional responses and behavioral coping responses to perceived racism were associated with BMI in African American women. METHODS: A sample of 110 African American women participated in a community-based study. Height and weight measurements were taken to calculate BMI and participants completed the Perceived Racism Scale and the Perceived Stress Scale. RESULTS: Hierarchical regression analyses demonstrated a significant relationship between BMI and behavioral coping responses to perceived racism. Findings for emotional responses to perceived racism and appraisal of one's daily life as stressful were nonsignificant. Mean comparisons of BMI groups showed that obese African American women used more behavioral coping responses to perceived racism as compared to normal-weight and overweight women in the sample. CONCLUSION: Findings suggest that behavioral coping responses better explained increased risk for obesity in African American women. A biobehavioral pathway may explain this finding with a stress-response process that includes cortisol reactivity. Maladaptive behavioral coping responses may also provide insight into obesity risk. Future research is needed to determine which behavioral coping responses place African American women at greater risk for obesity.

Subjective memory in older African Americans.

The current analysis examined (a) if measures of psychological well-being predict subjective memory, and (b) if subjective memory is consistent with actual memory. Five hundred seventy-nine older African Americans from the Baltimore Study of Black Aging completed measures assessing subjective memory, depressive symptomatology, perceived stress, locus of control, and verbal and working memory. Higher levels of perceived stress and greater externalized locus of control predicted poorer subjective memory, but subjective memory did not predict objective verbal or working memory. Results suggest that subjective memory is influenced by aspects of psychological well-being but is unrelated to objective memory in older African Americans.

Assessing mild cognitive impairment among older African Americans.

OBJECTIVES: To examine the frequency of Mild Cognitive Impairment (MCI) in African American older adults. The study also plans to explore the specific cognitive domains of impairment as well as whether there are differences in demographics, health, and cognitive performance between MCI and normal participants. DESIGN: Cross-sectional. SETTING: Independent-living sample of urban dwelling elders in Baltimore, Maryland. PARTICIPANTS: The sample consisted of 554 subjects ranging in age from 50 to 95 (Mean = 68.79 +/- 9.60). MEASUREMENTS: Socio-demographics and health were assessed. Several cognitive measures were administered to assess inductive reasoning, declarative memory, perceptual speed, working memory, executive functioning, language and global cognitive functioning. RESULTS: Approximately 22% of participants were considered MCI (i.e. 18% non-amnestic vs. 4% amnestic). A majority of the non-amnestic MCI participants had impairment in one cognitive domain, particularly language and executive function. Individuals classified as non-amnestic MCI were significantly older and had more years of education than normal individuals. The MCI groups were not significantly different than cognitively normal individuals on health factors. Individuals classified as MCI performed significantly worse on global cognitive measures as well as across specific cognitive domains than cognitively normal individuals. CONCLUSION: This study demonstrates that impairment in a non-memory domain may be an early indicator of cognitive impairment, particularly among African Americans.

An examination of dedifferentiation in cognition among African-American older adults.

The structure and organization of cognitive abilities has been examined across the life span. The current analysis had three specific aims: (1) test the factor structure of a broad cognitive ability battery across three age groups; (2) examine differences in the pattern of factor covariation across age groups; and (3) examine the pattern of factor mean differences across age groups. A sample of 512 older African Americans (mean age = 66.6 years, 25.4% male) from the Baltimore Study of Black Aging was administered a battery of cognitive tests assessing the domains of perceptual speed, verbal memory, inductive reasoning, vocabulary, and working memory. Factor models were estimated separately in middle-age adults (50-59 years, n = 107), young-old adults (60-69 years, n = 198), and old-old adults (70-79 years, n = 207). There was loading invariance across the three age groups that suggests that the selected tests measured cognition similarly across age. There was no evidence of dedifferentiation across increasingly older age groups. Factor mean differences were observed with the middle-age group having significantly higher factor means than the young-old and old-old groups; however, there was only one factor mean difference between the young-old and the old-old groups. The results suggest that a pattern of dedifferentiation of cognitive abilities does not exist within this sample of older African Americans and that the 60-69 year age range may be a critical period for cognitive decline in this population.

Relationships among blood pressure, triglycerides and verbal learning in African Americans.

BACKGROUND: Individuals at greater risk for cardiovascular disease (CVD) display poorer cognitive functioning across various cognitive domains. This finding is particularly prevalent among older adults; however, few studies examine these relationships among younger adults or among African Americans. PURPOSE: The objective was to examine the relationships among 2 cardiovascular risk factors, elevated blood pressure and elevated triglycerides, and verbal learning in a community-based sample of African Americans. METHODS: Measurements of blood pressure and triglycerides were obtained in 121 African-American adults and compared to performance on 3 domains of the California Verbal Learning Test-II (CVLT-II). RESULTS: Blood pressure was not related to CVLT-II performance. Triglyceride levels were inversely related to CVLT-II performance. Higher triglyceride levels were associated with poorer immediate, short delay and long delay recall. CONCLUSIONS: Consistent with studies involving older participants, the current investigation shows that in a nonelderly sample of African Americans, triglyceride levels may be related to cognitive functioning. Because early detection and intervention of vascular-related cognitive impairment may have a salutary effect, future studies should include younger adults to highlight the impact of cardiovascular risk on cognition.

Education Desegregation and Cognitive Change in African American Older Adults.

OBJECTIVES: The present study examined the relationship between desegregated schooling and cognitive change in a sample of 420 community-dwelling African American elders (mean age = 68.6; SD = 9.1). METHOD: Participants were recruited for the Baltimore Study of Black Aging - Patterns of Cognitive Aging. Cognitive measures from six domains of function were administered at baseline and follow-up 33 months later. Repeated measures multivariate analysis of covariance was conducted; the between subjects factors were schooling type and age cohort, and the within subjects factor was time. Analyses controlled for age, years of education, and sex, and follow-up univariate analyses were used to determine which individual cognitive scores drove the multivariate effects. RESULTS: There were significant multivariate within-group, between-group, and interaction effects (p < .05). Univariate analyses indicated that the desegregated schooling group scored significantly better on Language and Perceptual Speed (p < .01), and the youngest age cohort (50- to 59-year-olds) performed better on measures of Perceptual Speed. There were no significant univariate interactions between schooling group or age cohort and cognitive change over time. DISCUSSION: Overall, these findings suggest a slight advantage of desegregated schooling for cognitive performance, but no advantage of desegregated schooling on the rate of cognitive change over time in this sample.

Cognition and health in African American men.

OBJECTIVE: Despite high rates of poor health outcomes, little attention has been focused on associations between prominent health factors and cognitive function in African American men, exclusively. The objective was to examine relationships between cardiovascular and pulmonary health, and cognitive function in African American men. METHOD: Data from 257 men were pooled from two studies of African American aging. The mean age of participants was 58.15 and mean educational attainment was 11.78 years. Participants provided self-reported health and demographic information, completed cognitive measures, and had their blood pressure and peak expiratory flow assessed. RESULTS: After adjustment, significant relationships were found between average peak expiratory flow rate (APEFR) and cognitive performance measures. DISCUSSION: Results suggest that lung function is important to consider when examining cognitive function in African American men. Understanding the role of health in cognition and implications for quality of life in this population will be critical as life expectancies increase.

Prevalence of depressive symptoms and associated factors in older adult public housing residents.

The purpose of this pilot study was to identify the prevalence of and risk factors associated with depressive symptoms among older adult residents of a public housing apartment. Self-reported depressive symptoms were measured with the Center for Epidemiologic Studies Depression Scale (CES-D) 8. A self-report questionnaire was used to collect data on risk factors of sociodemographic information, cardiovascular health history, and history of depression. Fifty-eight of 171 residents responded, and 31% of residents met the CES-D 8 criterion for depression (total score ≥7). Sequential multiple regression models identified age, loss of loved ones in the past year, and financial worries as significant predictors of CES-D 8 scores. These study results have implications for future studies of depressive symptoms in older adults, suggesting that grief and financial assistance programs may help reduce risks associated with depressive symptoms among community-dwelling older adults living in public housing.

The influence of functional social support on executive functioning in middle-aged African Americans.

Social support has a positive influence on cognitive functioning and buffers cognitive decline in older adults. This study examined the relations between social support and executive functioning in middle-aged adults. A community-based sample of African Americans completed the Interpersonal Support Evaluation List, a measure of functions of social support, and two measures of executive functioning, the Stroop Color and Word Test and the Wisconsin Card Sorting Test (WCST). Hierarchical regression analyses were used to explore the hypothesis that different facets of perceived social support influence performance on measures of executive functioning. After controlling for age, gender, and education, social support facets including belonging support, self-esteem support, appraisal support, and tangible support were significant predictors of Stroop performance. In addition, tangible support significantly predicted WCST performance. These findings add to previous literature on social support and cognition; however, findings for middle-aged adults are unique and suggest that social support has a positive influence on some executive functions in African Americans prior to old age.

Cardiovascular health and education as sources of individual variability in cognitive aging among African Americans.

OBJECTIVE: To examine the interrelated effects of cardiovascular health, education, and cognitive functioning in African Americans. METHOD: The present study utilized data from the Baltimore Study of Black Aging to examine whether (a) cardiovascular health and educational attainment predicted cognitive functioning, after controlling for age, and (b) there was an interaction between cardiovascular health and education in predicting cognitive functioning. RESULTS: Using hierarchical regression analyses, results showed education was significant for all cognitive measures; however, cardiovascular health was significant for only three. DISCUSSION: These findings suggest that although self-reported cardiovascular health contributes to variability in late life cognition in African Americans, education is a more universal predictor that should be further examined.