Social stratification and allostatic load: shapes of health differences in the MIDUS study in the United States.

Social stratification is an important mechanism of human organization that helps to explain health differences between demographic groups commonly associated with socioeconomic gradients. Individuals, or group of individuals, with similar health profiles may have had different stratification experiences. This is particularly true as social stratification is a significant non-measurable source of systematic unobservable differences in both SES indicators and health statuses of disadvantage.

Hyperkyphosis, kyphosis progression, and risk of non-spine fractures in older community dwelling women: the study of osteoporotic fractures (SOF).

While accentuated kyphosis is associated with osteoporosis, it is unknown whether it increases risk of future fractures, independent of bone mineral density (BMD) and vertebral fractures. We examined the associations of baseline Cobb angle kyphosis and 15 year change in kyphosis with incident non-spine fractures using data from the Study of Osteoporotic Fractures. A total of 994 predominantly white women, aged 65 or older, were randomly sampled from 9704 original participants to have repeated Cobb angle measurements of kyphosis measured from lateral spine radiographs at baseline and an average of 15 years later.

Erratum to: Marital histories, marital support, and bone density: findings from the Midlife in the United States Study.

Compared to stably married men, men who were currently divorced, widowed, or separated, men who were currently married but previously divorced, widowed, or separated, and never married men had 0.34 (95 % CI: 0.01, 0.

Kyphosis and paraspinal muscle composition in older men: a cross-sectional study for the Osteoporotic Fractures in Men (MrOS) research group.

Background: The prevalence of hyperkyphosis is increased in older men; however, risk factors other than age and vertebral fractures are not well established. We previously reported that poor paraspinal muscle composition contributes to more severe kyphosis in a cohort of both older men and women.

Methods: To specifically evaluate this association in older men, we conducted a cross-sectional study to evaluate the association of paraspinal muscle composition and degree of thoracic kyphosis in an analytic cohort of 475 randomly selected participants from the Osteoporotic Fractures in Men (MrOS) study with baseline abdominal quantitative computed tomography (QCT) scans and plain thoracic radiographs.

Marital histories, marital support, and bone density: findings from the Midlife in the United States Study.

Unlabelled: We examined the association between marital life history and bone mineral density (BMD) in a national sample from the US. In men, being stably married was independently associated with better lumbar spine BMD, and in women, more spousal support was associated with better lumbar spine BMD.

Introduction: Adult bone mass may be influenced by stressors over the life course.

Biological correlates of adult cognition: midlife in the United States (MIDUS).

Multiple biological processes are related to cognitive impairment in older adults, but their combined impact on cognition in midlife is not known. Using an array of measurements across key regulatory physiological systems and a state-of-the-art cognition battery that is sensitive to early changes, in a large, national sample of middle-aged and older adults, we examined the associations of individual biological systems and a combined, multi-system index, allostatic load, with cognitive performance. Allostatic load was strongly inversely associated with performance in both episodic memory and executive function.

Insulin resistance and bone strength: findings from the study of midlife in the United States.

Although several studies have noted increased fracture risk in individuals with type 2 diabetes mellitus (T2DM), the pathophysiologic mechanisms underlying this association are not known. We hypothesize that insulin resistance (the key pathology in T2DM) negatively influences bone remodeling and leads to reduced bone strength. Data for this study came from 717 participants in the Biomarker Project of the Midlife in the United States Study (MIDUS II).

Social strain and executive function across the lifespan: the dark (and light) sides of social engagement.

We investigated how the association between social strain and cognitive efficiency varies with task demands across adulthood, from latencies on simpler speeded tasks to tests involving executive function. Participants (N = 3280) were drawn from the MIDUS survey, a large, diverse national sample of adults who completed cognitive tests including speeded task-switching (Tun & Lachman, 2008, Developmental Psychology, 44, 1421). After controlling for demographic and health variables, we found that higher levels of reported social strain were associated with slower processing speed, particularly for the complex task-switching test relative to simpler speeded tests.

Socioeconomic status, race, and bone turnover in the Midlife in the US Study.

Unlabelled: Among a group of 940 US adults, economic adversity and minority race status were associated with higher serum levels of markers of bone turnover. These results suggest that higher levels of social stress may increase bone turnover.

Introduction: To determine socioeconomic status (SES) and race differences in levels of bone turnover.

Histories of social engagement and adult cognition: midlife in the U.S. study.

Objectives: To evaluate whether social contacts, support, and social strain/conflict are related to executive function and memory abilities in middle-age and older adults.

Methods: Longitudinal data on social contacts, support, and strain/conflict were examined in relation to executive function and memory at ages 35-85 years using data from the national Midlife in the U.S.

Depressive symptoms, chronic diseases, and physical disabilities as predictors of cognitive functioning trajectories in older Americans.

Objectives: To determine the concurrent influence of depressive symptoms, medical conditions, and disabilities in activities of daily living (ADLs) on rates of decline in cognitive function of older Americans.

Design: Prospective cohort.

Setting: National population based.

Trajectories of cognitive function in late life in the United States: demographic and socioeconomic predictors.

This study used mixed-effects modeling of data from a national sample of 6,476 US adults born before 1924, who were tested 5 times between 1993 and 2002 on word recall, serial 7's, and other mental status items to determine demographic and socioeconomic predictors of trajectories of cognitive function in older Americans. Mean decline with aging in total cognition score (range, 0-35; standard deviation, 6.00) was 4.

A multilevel analysis of urban neighborhood socioeconomic disadvantage and health in late life.

The associations between neighborhood context and various indicators of health are receiving growing empirical attention, but much of this research is regionally circumscribed or assumes similar effects across the life course. This study utilizes a U.S.

HIV-related traumatic stress symptoms in AIDS caregiving family dyads.

This study assesses HIV-related traumatic stress symptoms in 135 AIDS caregiving family dyads in which the caregiver is a midlife or older mother or wife, and the care-recipient is her HIV-infected adult son or husband. Symptoms of HIV-related traumatic stress can be reliably measured in these dyads, with both caregivers and care-recipients reporting avoidant and intrusive thoughts. Among care-recipients, high symptoms are associated with high daily living assistance requirements, low dyadic adjustment, and high constriction of social activities.

Urban neighborhoods and depressive symptoms among older adults.

Objective: This study seeks to determine whether depressive symptoms among older persons systematically vary across urban neighborhoods such that experiencing more symptoms is associated with low socioeconomic status (SES), high concentrations of ethnic minorities, low residential stability and low proportion aged 65 years and older.

Methods: Survey data are from the Study of Assets and Health Dynamics Among the Oldest Old (AHEAD), a 1993 U.S.

The role of family caregivers in HIV medication adherence.

This study examines the role that mid-life and older wives and mothers play in promoting medication adherence among their HIV-infected husbands or adult sons who require daily living assistance. Interviews were conducted with 112 caregiving dyads, with caregivers reporting on their own behaviours and attitudes towards medications, and care-recipients (persons living with HIV [PLH]) providing information about their own adherence practices. By examining how caregiver characteristics, behaviours, and attitudes may influence PLH adherence it is explicitly recognized that caregivers and PLH are linked within a caregiving dyad.

Urban neighborhood context, educational attainment, and cognitive function among older adults.

Existing research has not addressed the potential impact of neighborhood context--educational attainment of neighbors in particular--on individual-level cognition among older adults. Using hierarchical linear modeling, the authors analyzed data from the 1993 Study of Assets and Health Dynamics Among the Oldest Old (AHEAD), a large, nationally representative sample of US adults born before 1924. Data from participants residing in urban neighborhoods (n = 3,442) were linked with 1990 US Census tract data.

A refined protocol for coding nursing home residents' comments during satisfaction interviews.

Objective: This study's objective was to refine a method for coding nursing home (NH) residents' comments about their perceptions of care into unmet needs specific to the manner and frequency of care delivery.

Methods: NH residents (N=69) were interviewed with both closed-ended (i.e.

Perceived HIV stigma in AIDS caregiving dyads.

This study examines perceived HIV stigma in AIDS caregiving dyads in the United States, assessing the measurement of and correlates of personal stigma (among care-recipients living with HIV), courtesy stigma (among caregivers), and dyadic stigma. Survey data from 135 dyads in which the caregiver is a midlife or older mother or wife, and the care-recipient is her HIV-infected adult son or husband, are analyzed with individual-level and multilevel regression models. Results indicate that: (1) perceived stigma can be reliably measured among both persons living with HIV (PLH) and caregivers; (2) personal stigma can be distinguished from courtesy stigma; (3) perceived stigma is relatively low in this sample, and is higher among PLH than caregivers, higher among caregiving wives than mothers, and similar between PLH who are husbands and sons; (4) dyadic stigma is influenced by the caregiver's HIV status, the ethnic composition of the dyad, caregiving duration, and household income; (5) stigma discrepancy within dyads is a function of health discrepancy within dyads; and (6) differences in multivariate correlates of perceived stigma at the individual-level, in comparison to the dyad-level, suggest that dyadic stigma is a unique construct.