Geographic Patterns of Dementia in the United States: Variation by Place of Residence, Place of Birth, and Subpopulation.

OBJECTIVES: The prevalence of dementia varies geographically in the United States. However, the extent to which this variation reflects contemporary place-based experiences versus embodied exposures from earlier in the life course remains unclear, and little is known regarding the intersection of place and subpopulation. This study, therefore, evaluates whether and how risk for assessed dementia varies by place of residence and birth, overall and by race/ethnicity and education. METHODS: We pool data from the 2000 to 2016 waves of the Health and Retirement Study, a nationally representative panel survey of older U.S. adults (n = 96,848 observations). We estimate the standardized prevalence of dementia by Census division of residence and birth. We then fit logistic regression models of dementia on region of residence and birth, adjusting for sociodemographic characteristics, and examine interactions between region and subpopulation. RESULTS: The standardized prevalence of dementia ranges from 7.1% to 13.6% by division of residence and from 6.6% to 14.7% by division of birth, with rates highest throughout the South and lowest in the Northeast and Midwest. In models accounting for region of residence, region of birth, and sociodemographic covariates, Southern birth remains significantly associated with dementia. Adverse relationships between Southern residence or birth and dementia are generally largest for Black and less-educated older adults. As a result, sociodemographic disparities in predicted probabilities of dementia are largest for those residing or born in the South. DISCUSSION: The sociospatial patterning of dementia suggests its development is a lifelong process involving cumulated and heterogeneous lived experiences embedded in place.

The maternal health of American Indian and Alaska Native people: A scoping review.

Indigenous people in the United States experience disadvantage in multiple domains of health. Yet, their maternal health receives limited research attention. With a focus on empirical research findings, we conduct a scoping review to address two questions: 1) what does the literature tell us about the patterns and prevalence of maternal mortality and morbidity of American Indian and Alaska Native (AI/AN) people? and 2) how do existing studies explain these patterns? A search of CINAHL, Embase and Medline yielded 4757 English-language articles, with 66 eligible for close review. Of these, few focused specifically on AI/AN people's maternal health. AI/AN people experience higher levels of maternal mortality and morbidity than non-Hispanic White people, with estimates that vary substantially across samples and geography. Explanations for the maternal health of AI/AN people focused on individual factors such as poverty, cultural beliefs, and access to healthcare (e.g. lack of insurance). Studies rarely addressed the varied historical and structural contexts of AI/AN tribal nations, such as harms associated with colonization and economic marginalization. Research for and by Indigenous communities and nations is needed to redress the effective erasure of AI/AN people's maternal health experiences and to advance solutions that will promote their health and well-being.

The Contributions of Hypertension Diagnosis and Blood Pressure Control to Subjective Life Expectancy in a Representative Sample of Older U.S. Adults.

OBJECTIVES: High blood pressure (BP) or hypertension, a major risk factor for death and disease, is pervasive among older adults. While reducing BP to targeted levels can prevent adverse outcomes, rates of successful BP control remain suboptimal, and it is unclear whether older adults recognize its proven benefits. The current study sheds light on older adults' beliefs about the consequences of hypertension and benefits of BP control by examining how their self-reports of hypertension diagnosis and BP control, as well as measured BP, contribute to subjective life expectancy (SLE), their perceived probability of surviving to a target age. METHODS: In a representative sample of U.S. adults aged 50-89 from the 2006-2014 Health and Retirement Study (n = 18,979 respondents), we analyze SLE using generalized linear regression. RESULTS: Diagnosed hypertension is associated with lower SLE, regardless of measured BP. Among diagnosed hypertensives, those who self-report controlled BP expect to live longer than those who do not. Finally, about 1 in 10 older adults have high measured BP but have never been diagnosed with hypertension, and most diagnosed hypertensives with uncontrolled measured BP self-report their BP as controlled. DISCUSSION: Older adults appear to recognize the harmful effects of hypertension and the benefits of BP control, but often lack knowledge of their own hypertension and BP control statuses. Health communications should continue to stress the value of BP control, although improvements may require increased hypertension awareness and BP monitoring.

Embodiment, agency, unmet need: Young women's experiences in the use and non-use of contraception in Khayelitsha, South Africa.

Globally, high rates of unintended pregnancy occur despite widespread distribution of modern contraceptive methods, reflecting the complexity of individual contraceptive use. The concept of unmet need provides a framework for addressing the gap between women's desire to prevent pregnancy and the ability of health services to meet women's contraceptive needs. Through in-depth interviews in Khayelitsha, South Africa, we examine 14 young women's experiences with contraception, interrogating how and why reproductive intentions and outcomes often differ markedly. Three main themes were identified and explored. First, unintended pregnancies were common in our sample, despite high knowledge about contraceptive options and availability of multiple methods. Second, women's contraceptive preferences are strongly shaped by concerns with side effects and other embodied experiences, leading to pivotal moments of method-switching or cessation of contraceptive use. Third, using contraception provides participants with the potential for purposeful and self-directed action. These enactments of agency though, occur within intimate and familial relationships, where gendered expectations of the participants' choices ultimately shape both method preference and use. These findings demonstrate the need for an understanding of women's lives and narratives as the basis for understanding complex health behaviours such as contraceptive use.

Women's Political Leadership and Adult Health: Evidence from Rural and Urban China.

This study examined the role of women's political leadership at the community level in China, a context that has experienced recent political and socioeconomic change and has a distinctive rural-urban divide. Drawing on longitudinal data from the China Family Panel Studies (N range = 40,918-52,406 person-year observations), we found that female community directors outnumbered male directors in urban China but were much less common in rural areas. Female community directors had higher levels of human capital regardless of rural or urban location. Residents living in female-directed communities reported better mental health but not physical health or life satisfaction compared to those living in male-directed communities, and this association was most robust among rural women. For rural women, the mental health benefit of living in female-directed communities was partially explained by reduced personal experience of gender discrimination, suggesting that female leadership fosters ideational change toward women that lowers discriminatory behaviors among constituents.

Happy Moms, Happier Dads: Gendered Caregiving and Parents' Affect.

Parenting is emotionally demanding and highly gendered. We use data from the American Time Use Survey to examine mothers' and fathers' momentary affect during childcare activities. We observe a gender imbalance in the emotional rewards of childcare: fathers report more happiness, less stress, and less tiredness than mothers. We introduce the "care context"-defined as the type of childcare activity, when and where it takes place, who is present, and how much care is involved-as an explanation for these gender differences in parents' affect. The analysis reveals that most dimensions of the care context vary between mothers and fathers. We also find that the care context fully accounts for differences in mothers' and fathers' happiness, partially explains differences in stress, and does little to explain differences in tiredness. Thus, the gender imbalance in the emotional rewards of childcare is partially due to parents' highly gendered engagement with their children.

The Empower Nudge lottery to increase dual protection use: a proof-of-concept randomised pilot trial in South Africa.

The objective of this study is to measure the preliminary efficacy of a pilot intervention, grounded in behavioural economics, increasing adherence of dual protection (simultaneous use of effective modern contraception and a barrier method, such as a condom) to protect against HIV, other sexually transmitted infections, and unintended pregnancy. Between 2015 and 2016, 100 women aged 18-40 years, seeking post-abortion care in Cape Town, South Africa were recruited to Empower Nudge, a randomised controlled trial to test a lottery incentive intervention designed to increase dual protection. At baseline, the mean age of participants was 27 years; 82% of them were from South Africa; 58% self-identified as Black African; average education completed was 11.7 years. At three months, assignment to the lottery intervention was associated with higher odds of returning for study visits (OR: 6.0; 95%CI: 2.45 to 14.7, p < 0.01), higher condom use (OR: 4.5; 95%CI: 1.43 to 14.1; p < 0.05), and higher use of dual protection (OR: 3.16; 95%CI: 1.01 to 9.9; p < 0.05). Only 60% of the study population returned after three months and only 38% returned after six months. Women who receive post-abortion care represent a neglected population with an urgent need for HIV and pregnancy prevention. Dual protection is a critically important strategy for this population. Lottery-based behavioural economics strategies may offer possible ways to increase dual protection use in this population. Further research with larger samples, longer exposure time, and more sites is needed to establish fully powered efficacy of lottery incentives for dual protection; using objective verification for monitoring.

Gender Differences in Biological Function in Young Adulthood: An Intragenerational Perspective.

Sex/gender differences in health are a function of social and biological factors, and their interplay over the life course. Despite a large body of research documenting sex/gender as a determinant of health behavior and outcomes, far less scholarship examines how these differences are reflected in physiologic function-an important mediator through which social experiences "get under the skin"-in young adulthood. Using nationally representative, longitudinal data from the National Longitudinal Study of Adolescent to Adult Health (Add Health), we examine the relationship between gender and biological function (inflammation and immunosuppression) in young adulthood. Second, we examine the contribution of social and economic circumstances in childhood and early adulthood to gender differences in health. The findings reveal strong gender differences in physiologic function, which are robust to the inclusion of many indicators of the social environment, in both inflammation and immune function.

Negotiating intersex: A case for revising the theory of social diagnosis.

The theory of social diagnosis recognizes two principles: 1) extra-medical social structures frame diagnosis; and 2) myriad social actors, in addition to clinicians, contribute to diagnostic labels and processes. The relationship between social diagnosis and (de)medicalization remains undertheorized, however, because social diagnosis does not account for how social actors can also resist the pathologization of symptoms and conditions-sometimes at the same time as they clamor for medical recognition-thereby shaping societal definitions of disease in different, but no less important, ways. In this article, we expand the social diagnosis framework by adding a third principle, specifically that 3) social actors engage with social structures to both contribute to, and resist, the framing of a condition as pathological (i.e. medicalization and demedicalization). This revised social diagnosis framework allows for the systematic investigation of multi-directional, dynamic processes, formalizing the link between diagnosis and (de)medicalization. It also responds to long-standing calls for more contextualized research in (de)medicalization studies by offering a framework that explicitly accounts for the social contexts in which (de)medicalizing processes operate. To showcase the utility of this revised framework, we use it to guide our analyses of a highly negotiated diagnosis: intersex.

Gender and genetic contributions to weight identity among adolescents and young adults in the U.S.

In this paper, we investigate the possibility that genetic variation contributes to self-perceived weight status among adolescents and young adults in the U.S. Using samples of identical and fraternal twins across four waves of the National Longitudinal Study of Adolescent to Adult Health (Add Health) study, we calculate heritability estimates for objective body mass index (BMI) that are in line with previous estimates. We also show that perceived weight status is heritable (h(2) ∼ 0.47) and most importantly that this trait continues to be heritable above and beyond objective BMI (h(2) ∼ 0.25). We then demonstrate significant sex differences in the heritability of weight identity across the four waves of the study, where h(2)women = 0.39, 0.35, 0.40, and 0.50 for each wave, respectively, and h(2)men = 0.10, 0.10, 0.23, and 0.03. These results call for a deeper consideration of both identity and gender in genetics research.

What do we know about children living with HIV-infected or AIDS-ill adults in Sub-Saharan Africa? A systematic review of the literature.

Millions of children in Sub-Saharan Africa live with adults, often parents, who are HIV-infected or ill due to AIDS. These children experience social, emotional, and health vulnerabilities that overlap with, but are not necessarily the same as, those of orphans or other vulnerable children. Despite their distinctive vulnerabilities, research aimed at understanding the situation of these children has been limited until very recently. This review summarizes the state of knowledge based on a systematic search of PubMed and Web of Science that identified 47 empirical research articles that examined either the population prevalence of children living with HIV-infected or AIDS-sick adults, or the consequences of adult HIV infection or AIDS illness for child well-being. This review confirms that this population of children is substantial in size, and that the vulnerabilities they experience are multi-faceted, spanning physical and emotional health and schooling. Mechanisms were examined empirically in only a small number of studies, but encompass poverty, transmission of opportunistic infections, care for unwell adults, adult distress, AIDS stigma, lack of social support, maternal breastfeeding issues, and vertical HIV transmission. Some evidence is provided that infants, adolescents, children with infected or ill mothers, and children living with severely ill adults are particularly vulnerable. Future research would benefit from more attention to causal inference and further characterization of processes and circumstances related to vulnerability and resilience. It would also benefit from further study of variation in observed associations between adult HIV/AIDS and child well-being based on characteristics such as age, sex, kinship, severity of illness, TB co-infection, disclosure, and serostatus awareness. Almost one-quarter of the studies reviewed did not investigate variation based on any of these factors. More nuanced understanding of the short- and long-term effects of adult HIV on children's needs and circumstances will be important to ongoing discussions about equity in policies and interventions.

Children Living with HIV-Infected Adults: Estimates for 23 Countries in sub-Saharan Africa.

BACKGROUND: In sub-Saharan Africa many children live in extreme poverty and experience a burden of illness and disease that is disproportionately high. The emergence of HIV and AIDS has only exacerbated long-standing challenges to improving children's health in the region, with recent cohorts experiencing pediatric AIDS and high levels of orphan status, situations which are monitored globally and receive much policy and research attention. Children's health, however, can be affected also by living with HIV-infected adults, through associated exposure to infectious diseases and the diversion of household resources away from them. While long recognized, far less research has focused on characterizing this distinct and vulnerable population of HIV-affected children. METHODS: Using Demographic and Health Survey data from 23 countries collected between 2003 and 2011, we estimate the percentage of children living in a household with at least one HIV-infected adult. We assess overlaps with orphan status and investigate the relationship between children and the adults who are infected in their households. RESULTS: The population of children living in a household with at least one HIV-infected adult is substantial where HIV prevalence is high; in Southern Africa, the percentage exceeded 10% in all countries and reached as high as 36%. This population is largely distinct from the orphan population. Among children living in households with tested, HIV-infected adults, most live with parents, often mothers, who are infected; nonetheless, in most countries over 20% live in households with at least one infected adult who is not a parent. CONCLUSION: Until new infections contract significantly, improvements in HIV/AIDS treatment suggest that the population of children living with HIV-infected adults will remain substantial. It is vital to on-going efforts to reduce childhood morbidity and mortality to consider whether current care and outreach sufficiently address the distinct vulnerabilities of these children.

Social Determinants and Health Behaviors: Conceptual Frames and Empirical Advances.

Health behaviors shape health and well-being in individuals and populations. Drawing on recent research, we review applications of the widely applied "social determinants" approach to health behaviors. This approach shifts the lens from individual attribution and responsibility to societal organization and the myriad institutions, structures, inequalities, and ideologies undergirding health behaviors. Recent scholarship integrates a social determinants perspective with biosocial approaches to health behavior dynamics. Empirical advances model feedback among social, psychological and biological factors. Health behaviors are increasingly recognized as multidimensional and embedded in health lifestyles, varying over the life course and across place and reflecting dialectic between structure and agency that necessitates situating individuals in context. Advances in measuring and modeling health behaviors promise to enhance representations of this complexity.

Planning for motherhood: fertility attitudes, desires and intentions among women with disabilities.

CONTEXT: An estimated 10% of U.S. women of reproductive age report a current disability; however, the relationship between disability, motherhood attitudes and fertility intentions among these women is largely unknown. METHODS: Data from the 2006-2010 National Survey of Family Growth were used to examine attitudes toward motherhood and fertility intentions among 10,782 U.S. women aged 15-44. A series of regression models assessed, separately for mothers and childless women, associations between disability status and women's attitudes and intentions. RESULTS: Women with and without disabilities held similar attitudes toward motherhood. Among women without children, women with and without disabilities were equally likely to want a child and equally likely to intend to have one. However, childless women with disabilities who wanted and intended to have a child were more likely to report uncertainty about those intentions than were childless women without disabilities (odds ratio, 1.7). Mothers with disabilities were more likely to want another child (1.5), but less likely to intend to have a child (0.5), than were mothers without disabilities. CONCLUSIONS: Deepening understanding of the reproductive health desires, needs and challenges of women with disabilities is essential if the highest quality reproductive health services are to be provided for all.

Integrating space with place in health research: a multilevel spatial investigation using child mortality in 1880 Newark, New Jersey.

Research on neighborhoods and health increasingly acknowledges the need to conceptualize, measure, and model spatial features of social and physical environments. When ignoring underlying spatial dynamics, we run the risk of biased statistical inference and misleading results. In this article, we propose an integrated multilevel spatial approach for Poisson models of discrete responses. In an empirical example of child mortality in 1880 Newark, New Jersey, we compare this multilevel spatial approach with the more typical aspatial multilevel approach. Results indicate that spatially defined egocentric neighborhoods, or distance-based measures, outperform administrative areal units, such as census units. In addition, although results do not vary by specific definitions of egocentric neighborhoods, they are sensitive to geographic scale and modeling strategy. Overall, our findings confirm that adopting a spatial multilevel approach enhances our ability to disentangle the effect of space from that of place, pointing to the need for more careful spatial thinking in population research on neighborhoods and health.

Re-focusing the gender lens: caregiving women, family roles and HIV/AIDS vulnerability in Lesotho.

Gender and HIV risk have been widely examined in southern Africa, generally with a focus on dynamics within sexual relationships. Yet the social construction of women's lives reflects their broader engagement with a gendered social system, which influences both individual-level risks and social and economic vulnerabilities to HIV/AIDS. Using qualitative data from Lesotho, we examine women's lived experiences of gender, family and HIV/AIDS through three domains: (1) marriage; (2) kinship and social motherhood, and (3) multigenerational dynamics. These data illustrate how women caregivers negotiate their roles as wives, mothers, and household heads, serving as the linchpins of a gendered family system that both affects, and is affected by, the HIV/AIDS epidemic. HIV/AIDS interventions are unlikely to succeed without attention to the larger context of women's lives, namely their kinship, caregiving, and family responsibilities, as it is the family and kinship system in which gender, economic vulnerability and HIV risk are embedded.

Distinct loci in the CHRNA5/CHRNA3/CHRNB4 gene cluster are associated with onset of regular smoking.

Neuronal nicotinic acetylcholine receptor (nAChR) genes (CHRNA5/CHRNA3/CHRNB4) have been reproducibly associated with nicotine dependence, smoking behaviors, and lung cancer risk. Of the few reports that have focused on early smoking behaviors, association results have been mixed. This meta-analysis examines early smoking phenotypes and SNPs in the gene cluster to determine: (1) whether the most robust association signal in this region (rs16969968) for other smoking behaviors is also associated with early behaviors, and/or (2) if additional statistically independent signals are important in early smoking. We focused on two phenotypes: age of tobacco initiation (AOI) and age of first regular tobacco use (AOS). This study included 56,034 subjects (41 groups) spanning nine countries and evaluated five SNPs including rs1948, rs16969968, rs578776, rs588765, and rs684513. Each dataset was analyzed using a centrally generated script. Meta-analyses were conducted from summary statistics. AOS yielded significant associations with SNPs rs578776 (beta = 0.02, P = 0.004), rs1948 (beta = 0.023, P = 0.018), and rs684513 (beta = 0.032, P = 0.017), indicating protective effects. There were no significant associations for the AOI phenotype. Importantly, rs16969968, the most replicated signal in this region for nicotine dependence, cigarettes per day, and cotinine levels, was not associated with AOI (P = 0.59) or AOS (P = 0.92). These results provide important insight into the complexity of smoking behavior phenotypes, and suggest that association signals in the CHRNA5/A3/B4 gene cluster affecting early smoking behaviors may be different from those affecting the mature nicotine dependence phenotype.

Sex, gender, genetics, and health.

This article addresses 2 questions. First, to what extent are sex and gender incorporated into research on genetics and health? Second, how might social science understandings of sex and gender, and gender differences in health, become more integrated into scholarship in this area? We review articles on genetics and health published in selected peer-reviewed journals. Although sex is included frequently as a control or stratifying variable, few articles articulate a conceptual frame or methodological justification for conducting research in this way, and most are not motivated by sex or gender differences in health. Gender differences in health are persistent, unexplained, and shaped by multilevel social factors. Future scholarship on genetics and health needs to incorporate more systematic attention to sex and gender, gender as an environment, and the intertwining of social and biological variation over the life course. Such integration will advance understandings of gender differences in health, and may yield insight regarding the processes and circumstances that make genomic variation relevant for health and well-being.

Dynamic relations between fast-food restaurant and body weight status: a longitudinal and multilevel analysis of Chinese adults.

BACKGROUND: Mixed findings have been reported on the association between Western fast-food restaurants and body weight status. Results vary across study contexts and are sensitive to the samples, measures and methods used. Most studies have failed to examine the temporally dynamic associations between community exposure to fast-food restaurants and weight changes. METHODS: Bayesian hierarchical regressions are used to model changes in body mass index, waist-to-height ratio (WHtR) and waist-to-hip ratio (WHpR) as a function of changes in Western fast-food restaurants in 216 communities for more than 9000 Chinese adults followed up multiple times between 2000 and 2009. RESULTS: Number of Western fast-food restaurants is positively associated with subsequent increases in WHtR and WHpR among rural population. More fast-food restaurants are positively associated with a future increase in WHpR for urban women. Increased availability of fast food between two waves is related to increased WHtR for urban men over the same period. A past increase in number of fast-food restaurants is associated with subsequent increases in WHtR and WHpR for rural population. CONCLUSIONS: The associations between community exposure to Western fast food and weight changes are temporally dynamic rather than static. Improved measures of exposure to community environment are needed to achieve more precise estimates and better understanding of these relationships. In light of the findings in this study and China's rapid economic growth, further investigation and increased public health monitoring is warranted since Western fast food is likely to be more accessible and affordable in the near future.