A biobehavioral approach to understanding obesity and the development of obesogenic illnesses among Latino immigrants in the United States

Understanding family functioning in mothers and daughters with obesity

PURPOSE

This study sought to understand family functioning surrounding weight in Mexican American women with obesity.

METHODS

Semi-structured in-depth interviews were conducted with mothers and adult daughters (N = 116).

RESULTS

Thematic analysis identified five themes. 1) The communication process drives perception of supportive messages. Messages perceived as non-supportive consist of directives as interventions, confirmation of faults, and critical compliments whereas supportive consist of compliments, encouragement, empathetic listening, and disclosure. 2) Acculturation differences interfere with intergenerational alliance. Differences involve dissonance in communication, behavioural expectations, and weight-related practices. 3) Maladaptive conflict responses contribute to relational strain. These responses include avoidance, withdrawal, and defensiveness. 4) Role transformations alter the generational hierarchical relationship. Daughters serve as role models, caregivers, or collaborators. 5) Low communal coping heightens psychological distress. It does so by challenging family roles, increasing social isolation, and compromising social support.

CONCLUSION

Obesity interventions for Mexican American women may benefit from targeting relational skills to improve family functioning.

Improvements in stress among Latinas participating in a randomized controlled trial of technology-supported physical activity interventions

High levels of stress and inactivity likely contribute to chronic disease disparities among Latinas in the U.S. and call for intervention. To inform such efforts, the current study examined the relationships among changes (over time) in physical activity, stress, and related cardiometabolic biomarkers among sedentary (mostly) first generation Latinas. Data are taken from a randomized controlled trial (N = 199 Latinas) of two home-based physical activity interventions (Original vs. theory- and technology- Enhanced versions). Physical activity and perceived stress were assessed at baseline and 6 and 12 months. Blood draws occurred at baseline and 6 months in a random subsample (N = 153). The participants were underactive (<60/min week of moderate-to-vigorous physical activity) Mexican American (89%) women with moderate perceived stress scores (M = 21.49, SD = 8.55, range = 0-40) and excess weight (M BMI = 30.6) at baseline. Overall, participants reported decreases in stress after 6 months enroled in the physical activity programs. The odds of a reduction in perceived stress were 11% higher among Enhanced versus Original Intervention participants (OR = 1.11, 95% CI: 1.05-2.27). Those who met physical activity guidelines were significantly more likely to report reductions in perceived stress over 6 months (OR = 1.92, 95% CI: 1.08-4.16). Furthermore, those who reported reductions in perceived stress over 6 months reported significantly more moderate-to-vigorous physical activity at 12 months (+69 min/week, SE = 27.98, p = 0.01) compared to those who did not. Greater reductions in perceived stress over 6 months were associated with greater improvements in cardiometabolic biomarkers (HbA1c, triglycerides, p's < 0.05). These results support a bidirectional relationship between improvements in stress and physical activity among Latinas. Future implications include using physical activity to address stress management and health disparities in this community.

The intersection of social determinants of health, the microbiome, and health outcomes in immigrants: A scoping review

In the present scoping review, we explore whether existing evidence supports the premise that social determinants of health (SDoH) affect immigrant health outcomes through their effects on the microbiome. We adapt the National Institute on Minority Health and Health Disparities' research framework to propose a conceptual model that considers the intersection of SDoH, the microbiome, and health outcomes in immigrants. We use this conceptual model as a lens through which to explore recent research about SDoH, biological factors associated with changes to immigrants' microbiomes, and long-term health outcomes. In the 17 articles reviewed, dietary acculturation, physical activity, ethnicity, birthplace, age at migration and length of time in the host country, socioeconomic status, and social/linguistic acculturation were important determinants of postmigration microbiome-related transformations. These factors are associated with progressive shifts in microbiome profile with time in host country, increasing the risks for cardiometabolic, mental, immune, and inflammatory disorders and antibiotic resistance. The evidence thus supports the premise that SDoH influence immigrants' health postmigration, at least in part, through their effects on the microbiome. Omission of important postmigration social-ecological variables (e.g., stress, racism, social/family relationships, and environment), limited research among minoritized subgroups of immigrants, complexity and inter- and intra-individual differences in the microbiome, and limited interdisciplinary and biosocial collaboration restrict our understanding of this area of study. To identify potential microbiome-based interventions and promote immigrants' well-being, more research is necessary to understand the intersections of immigrant health with factors from the biological, behavioral/psychosocial, physical/built environment, and sociocultural environment domains at all social-ecological levels.

Effects of caregiver-child acculturation on child obesity among US Latino individuals

OBJECTIVE

The goal of this study was to assess the association of Latino caregiver-child nativity status (US- and foreign-born) with child obesity using a nationally representative sample.

METHODS

Using data from the National Health and Nutrition Examination Survey (NHANES 1999-2018), this study used generalized linear models to identify associations between caregiver-child nativity status (as a proxy for acculturation) and children's BMI.

RESULTS

Compared with foreign-born caregiver-child dyads, US-born caregiver-child dyads had 2.35 times the risk of class 2 obesity (95% CI: 1.59-3.47) and 3.60 times the risk of class 3 obesity (95% CI: 1.86-6.96). Foreign-born caregiver and US-born child dyads had 2.01 times the risk of class 2 obesity (95% CI: 1.42-2.84) and 2.47 times the risk of class 3 obesity (95% CI: 1.38-4.44; p < 0.05 for class 2 and class 3).

CONCLUSIONS

Compared with foreign-born Latino caregiver-child dyads, dyads with US-born caregivers and children and dyads with foreign-born caregivers and US-born children had significantly increased risk across the severe classes of obesity. Examining the influence and relationship of varying acculturation levels in an immigrant household will help guide more effective clinical and policy guidelines surrounding obesity and weight management in both pediatric and adult US Latino populations.

Support Provided by Caregivers for Community-Dwelling Obesity Individuals: Focus on Elderly and Hispanics

Obesity is a chronic disease marked by the buildup of extra adipose tissue and a higher chance of developing concomitant illnesses such as heart disease, diabetes, high blood pressure, and some malignancies. Over the past few decades, there has been a global increase in the prevalence of obesity, which now affects around one-third of the world's population. According to recent studies, a variety of factors, including genetics and biology as well as environmental, physiological, and psychosocial factors, may have a role in the development of obesity. The prevalence of obesity is often higher among Hispanic American groups than among White people in the U.S. Obesity is a widespread condition with a high risk of morbidity and death, and it is well-recognized that the prevalence of comorbidities rises with rising levels of obesity or body mass index. To combat the rising prevalence of obesity in the USA, especially among Hispanics, one of the fastest-growing racial/ethnic groups in the country, there is an urgent need for obesity therapies. The exact cause of this disparity is unclear, but some responsible factors are a lack of education, high unemployment rates, high levels of food insecurity, an unhealthy diet, inadequate access to physical activity resources, a lack of health insurance, and constricted access to culturally adequate healthcare. Additionally, managing obesity and giving needed/timely support to obese people is a difficult responsibility for medical professionals and their loved ones. The need for caregivers is increasing with the increased number of individuals with obesity, particularly Hispanics. Our article summarizes the status of obesity, focusing on Hispanic populations, and we also highlight specific factors that contribute to obesity, including genetics, epigenetics, biological, physiological, and psychosocial factors, medication and disease, environment, and socio-demographics. This article also reviews caregiver duties and challenges associated with caring for people with obesity.

Allostatic Load and Its Impact on Health: A Systematic Review

INTRODUCTION

Allostatic load refers to the cumulative burden of chronic stress and life events. It involves the interaction of different physiological systems at varying degrees of activity. When environmental challenges exceed the individual ability to cope, then allostatic overload ensues. Allostatic load is identified by the use of biomarkers and clinical criteria.

OBJECTIVE

To summarize the current knowledge on allostatic load and overload and its clinical implications based on a systematic review of the literature.

METHODS

PubMed, PsycINFO, Web of Science, and the Cochrane Library were searched from inception to December 2019. A manual search of the literature was also performed, and reference lists of the retrieved articles were examined.We considered only studies in which allostatic load or overload were adequately described and assessed in either clinical or non-clinical adult populations.

RESULTS

A total of 267 original investigations were included. They encompassed general population studies, as well as clinical studies on consequences of allostatic load/overload on both physical and mental health across a variety of settings.

CONCLUSIONS

The findings indicate that allostatic load and overload are associated with poorer health outcomes. Assessment of allostatic load provides support to the understanding of psychosocial determinants of health and lifestyle medicine. An integrated approach that includes both biological markers and clinimetric criteria is recommended.

Identifying Key Determinants of Childhood Obesity: A Narrative Review of Machine Learning Studies

Machine learning is a class of algorithms able to handle a large number of predictors with potentially nonlinear relationships. By applying machine learning to obesity, researchers can examine how risk factors across multiple settings (e.g., school and home) interact to best predict childhood obesity risk. In this narrative review, we provide an overview of studies that have applied machine learning to predict childhood obesity using a combination of sociodemographic and behavioral risk factors. The objective is to summarize the key determinants of obesity identified in existing machine learning studies and highlight opportunities for future machine learning applications in the field. Of 15 peer-reviewed studies, approximately half examined early childhood (0-24 months of age) determinants. These studies identified child's weight history (e.g., history of overweight/obesity or large increases in weight-related measures between birth and 24 months of age) and parental overweight/obesity (current or prior) as key risk factors, whereas the remaining studies indicated that social factors and physical inactivity were important in middle childhood and late childhood/adolescence. Across age groups, findings suggested that race/ethnic-specific models may be needed to accurately predict obesity from middle childhood onward. Future studies should consider using existing large data sets to take advantage of the benefits of machine learning and should collect a wider range of novel risk factors (e.g., psychosocial and sociocultural determinants of health) to better predict childhood obesity. Ultimately, such research can aid in the development of effective obesity prevention interventions, particularly ones that address the disproportionate burden of obesity experienced by racial/ethnic minorities.

Examining Food Addiction and Acculturation Among a Hispanic Bariatric Surgery-Seeking Participant Group

OBJECTIVE

This study examined food addiction (FA) and acculturation among a Hispanic bariatric surgery-seeking sample.

SETTING

University hospital.

METHOD

Four hundred forty-four (n = 215 English-speaking; n = 229 Spanish-speaking) Hispanic adults seeking bariatric surgery completed established self-report measures examining food addiction and acculturation.

RESULTS

35.8% met criteria for FA, which was significantly associated with acculturation level to the USA. Participants who endorsed greater acculturation also endorsed a significantly higher level of FA symptoms compared with those who endorsed less acculturation. Acculturation level was significantly associated with FA and BMI.

CONCLUSIONS

FA rate in this bariatric surgery-seeking Hispanic patient group is similar to rates reported among bariatric candidates of varying ethnic backgrounds. Our results suggest a relationship between FA symptom expression and acculturation to the USA. Improving understanding of the onset and progression of severity of FA symptoms may have clinical implications for Hispanic patients seeking bariatric surgery.

Biobehavioural approaches to prevention and treatment: A call for implementation science in obesity research

Much progress has been made in the last 30 years in understanding the causes and mechanisms that contribute to obesity, yet widely available and successful strategies for prevention and treatment remain elusive at population levels. This paper discusses the biobehavioural framework and provides suggestions for applying it to enable greater progress in the science of obesity prevention and treatment, including an increased focus on implementation of science strategies. The objective is to promote a re-evaluation of current views about preventing and treating obesity within a unified biobehavioural framework. Further integration of research exploring how both behavioural and biological components interact is a critical step forward.

Transnational Mother Blame: Protecting and Caring in a Globalized Context

Mexican women in both the United States and Mexico face uneven landscapes of benefits and discourses as they negotiate family members' health. Building on two decades of ethnographic research, I explore how Mexican mothers navigate social and medical services, food provision, food preparation and health, and describe some of the ways that governments in each country abdicate responsibility for shaping structural constraints on citizens' health. Transnational "mother blame" is a pattern that builds on tropes about the simultaneous responsibility and incapacity of women to ensure their family's health, while offering new articulations of responsibility in neoliberal, globalized, transnational contexts in which flexible care arrangements are both necessary and denigrated.

Acculturation stress and allostatic load among Mexican immigrant women

OBJECTIVES

this case-control study compared levels of stress and allostatic load (AL) among Mexican women in the US ( n =19) and Mexico ( n = 40).

METHOD

measures of stress included the Perceived Stress Scale (PSS) and the Hispanic Women's Social Stressor Scale (HWSSS). A composite measure of 8 indicators of AL (systolic and diastolic blood pressure, body mass index (BMI), waist-to-hip ratio, total cholesterol, glycated hemoglobin (hemoglobin A1C), triglycerides and C-reactive protein) was calculated.

RESULTS

there were no significant group differences in AL between Mexican and Mexican immigrant women ( t = 1.55, p = .126). A principal component factor analysis was conducted on the 8 AL indicators; a 2-factor solution explained 57% of the variance. Group differences in the two AL factors were analyzed using MANOVA. BMI and waist-to-hip ratios were lower, but blood pressure and triglycerides were higher in the US group and were mediated by time in the US. Greater acculturation stress was significantly related to increased waist-to-hip ratio ( r = .57, p = .02).

FINAL REMARKS

findings suggest some measures of AL increased with time in the US, and acculturation stress may be a significant factor.

It Weigh(t)s on You: Everyday Discrimination and Adiposity Among Latinos

OBJECTIVE

Evidence suggests discrimination increases the risk of obesity. The biopsychosocial model of racism posits that psychological factors such as depressive symptoms may link experiences of perceived interpersonal discrimination to obesity. This study tested whether self-reported experiences of everyday discrimination were associated with adiposity indicators and whether depressive symptoms explained these associations.

METHODS

Cross-sectional survey data of 602 Latino adults living in Lawrence, Massachusetts, from the Latino Health and Well-being Project (2011-2013) were used. Participants completed questionnaires assessing perceived everyday discrimination and depressive symptoms. Anthropometric measures (i.e., BMI and waist circumference [WC]) were obtained by trained staff. Structural equation modeling was employed to test for direct and indirect effects of perceived everyday discrimination on adiposity.

RESULTS

Perceived everyday discrimination was directly and positively associated with higher BMI and WC, independent of sociodemographic factors, physical activity, and stressful life events. Perceived everyday discrimination was not indirectly associated with BMI and WC through depressive symptoms. However, perceived everyday discrimination was associated with higher levels of depressive symptoms.

CONCLUSIONS

Self-reported everyday discrimination among Latino adults is associated with adiposity. Day-to-day interpersonal discrimination may be implicated in obesity disparities for Latino adults.

Social Support for Exercise as a Predictor of Weight and Physical Activity Status Among Puerto Rican and Mexican Men: Results From the Latino Men's Health Initiative

Social support is an important factor in increasing positive health outcomes and positive health behaviors across a variety of disease states including obesity. However, research examining the relationship between social support for exercise and weight and physical activity status, particularly among Latino men, is lacking. This paper examined whether social support for exercise predicted weight and physical activity status and whether the direction of these relationships differ as a function of Hispanic/Latino background (Puerto Rican/Mexican). Participants were 203 men who participated in a National Institutes of Health (NIH)-funded study addressing culture- and obesity-related variables. Both family participation social support and family rewards and punishment social support predicted higher weight status (p < .005 and p < .05, respectively). Friend participation social support did not predict weight status. The direction of the relationship between weight status and family participation social support, family rewards and punishment social support, and friend participation social support did not significantly differ as a function of Hispanic/Latino background. The direction of the relationship between physical activity status and family participation social support, family rewards and punishment social support, and friend participation social support did not significantly differ as a function of Hispanic/Latino background. Findings suggest that increased social support for exercise from family members may be focused on those who need it most—overweight and obese participants. Additional research is needed to explore sociocultural factors that may promote social support, physical activity, and weight loss and maintenance in Puerto Rican and Mexican men.

Acculturative stress in Korean Americans

BACKGROUND

Acculturative stress is known to contribute to chronic diseases among many immigrants and yet this association in Korean Americans remains unclear.

AIM

The study purpose was to examine the level of acculturative stress in Korean Americans and to determine if correlations existed with personal and physiological factors.

METHODS

An exploratory, cross-sectional, descriptive study was conducted in a sample of 107 Korean American adults. Data on acculturative stress and personal factors were collected using a survey questionnaire in addition to a direct measure of physiological factors (i.e., body mass index and blood pressure).

RESULTS

All 107 participants were first-generation Koreans. Most participants were women (66.4%), with a mean age of 53.9±10.7, married (88.8%), and with a college education (84.2%). Acculturative stress was associated with a number of personal factors (i.e., arrival age, years of U.S education, years of U.S. residency, English proficiency), and the personal factors of gender, age, employment status, and years of U.S. residency were associated with the physiological factors. No statistically significant associations were found between acculturative stress and physiological factors.

CONCLUSIONS

The mean acculturative stress score in this study was higher than findings from prior studies of Korean immigrants in the United States or Canada, with the rates of obesity and hypertension higher than prior reports of Korean Americans or Koreans residing in Korea. Future study is necessary with a larger sample from a variety of different geographic areas of the United States to examine further the impact of acculturative stress on physiological factors during the process of acculturation.

Depressive Symptoms and Length of U.S. Residency Are Associated with Obesity among Low-Income Latina Mothers: A Cross-Sectional Analysis

Latinos are the largest minority population group in the United States (U.S.), and low-income Latina women are at elevated risk of depression and obesity. Thus, the prevention of these two problems is a pressing public health concern in this population. Both depressive symptoms and obesity are modifiable factors that can be addressed by culturally relevant interventions. However, the association between depressive symptoms and obesity in Latina immigrant women is not well understood. Therefore, this cross-sectional study examined the association between depressive symptoms and obesity among Latina women of childbearing age (15–44). Participants (n = 147) were low-income, predominantly immigrant Latina mothers enrolled in the Latina Mothers′ Child Feeding Practices and Style Study. Women were eligible to participate if they self-identified as Latina; were enrolled in or eligible for the Special Supplemental Nutrition Program for Women, Infants and Children program; had a child between ages two and five years; and were living in the U.S. for at least one year, and residing in Rhode Island. Enrolled participants completed a survey in their language of preference (English or Spanish) administered by bilingual interviewers. About one-third (34%) of participants were classified as having obesity (BMI ≥ 30 kg/m²), 28.3% had elevated depressive symptoms (CES-D ≥ 16), and 70.1% were immigrants. Women with elevated depressive symptoms had increased odds of having obesity (odds ratio (OR) = 2.80, 95% confidence interval (CI): 1.24–6.33). Additionally, among immigrants, length of U.S. residency was associated with increased odds of obesity (OR = 1.05, 95% CI: 1.02–1.09). Findings underscore the need for screening and culturally relevant interventions designed to address both depressive symptoms and obesity among low-income Latina women of childbearing age. Furthermore, findings highlight the importance of taking into account the length of residency in the U.S. when designing interventions targeting Latina immigrants.

Cultural Variables Underlying Obesity in Latino Men: Design, Rationale and Participant Characteristics from the Latino Men's Health Initiative

Overweight and obesity are associated with significant health problems and rates of obesity are high among Latino men. This paper describes the design, rationale and participant characteristics of the key demographic variables assessed in an NIH-funded study (R21-CA143636) addressing culture and several obesity-related variables (diet, physical activity, and body image) among Mexican and Puerto Rican men using a community-based participatory research framework. Participants completed objective measures (height, weight, body fat, hip, waist), a health and culture interview, a diet questionnaire, and used an accelerometer to measure their level of physical activity. A total of 203 participants completed the measures and the health and culture interview and 193 completed all study components. Puerto Ricans were older than Mexicans (p < .0001) and there were significant differences in marital status (p < .05), country of birth (p < .05), smoking (p < .05) and work status (p < .001). There were no significant differences in religion, education, health insurance, Body Mass Index, body fat, hip and waist measurements, and the language preference of the interview. Results have implications for the development of a future intervention that incorporates the role of cultural factors into a community participatory obesity intervention for Latino men.

The Association between Parity and Inflammation among Mexican-American Women of Reproductive Age Varies by Acculturation Level: Results of the National Health and Nutrition Examination Survey (1999-2006)

INTRODUCTION

Parity and acculturation are linked with cardiometabolic risk. Their joint association with cardiometabolic health among Mexican-American women is less established, even though immigrant Mexican-American women have the highest fertility rate in the United States. We examined the modifying role of acculturation on the association of parity with a cardiometabolic risk biomarker, C-reactive protein (CRP).

METHODS

Participants (n = 1,002) were women of Mexican background, ages 16 to 39 years, in the National Health and Nutrition Examination Survey (NHANES) from 1999 through 2006. The association between parity and elevated CRP was examined using logistic regression adjusted for age, household food security, access to health care, hemoglobin A1c, total cholesterol, high-density lipoprotein cholesterol, waist circumference, physical activity, acculturation, and a product term of parity and acculturation. Acculturation was measured on a 6-point score based on nativity status and duration of residence in the United States (0, Mexico born, U.S. resident <10 years; 1, Mexico born, U.S. resident 10-19 years; 2-Mexico born, U.S. resident ≥20 years; and 3, U.S. born), and language used at home (0, Spanish; 1, bilingual; 2, English). Scores of 0 or 1, 2 or 3, and 4 or 5 represented low, moderate, and high acculturation, respectively.

RESULTS

The association of parity with elevated CRP varied by acculturation level (p_interaction = 0.10). Parity was associated with elevated CRP among women with low (adjusted odds ratio [OR], 2.26; 95% CI, 1.07-4.80) and moderate acculturation (adjusted OR, 2.79; 95% CI, 1.16-6.73), compared with nulliparous women.

CONCLUSIONS

Higher odds of elevated CRP associated with parity in immigrant Mexican-American women of reproductive age indicate the need for greater use of maternal/women's health care services for cardiometabolic risk screening and interventions.

Becoming American, becoming obese? A systematic review of acculturation and weight among Latino youth

Latino youth have the highest rate of overweight and obesity across ethnic and racial groups, placing these individuals at increased risk for a variety of negative immediate and long-term health outcomes. Many studies have shown that acculturative factors play a role in this process for adults, while less is known about the impact of these factors for children and adolescents. This study systematically reviews the current literature on acculturative factors and obesity among Latino children. Three hundred and seventy-nine studies were independently reviewed by two coders for eligibility. Twenty-nine studies met eligibility criteria and were included in the final review. Results indicated that relations between acculturation and obesity among Latino children are equivocal. Across studies reviewed, the significance and directionality of this relation differed. Heterogeneity across studies reviewed, including age, specific population and measures used for assessing acculturation, likely contributed to the mixed results. To provide greater clarity on the role of acculturative factors on obesity, future studies should (i) utilize a longitudinal design; (ii) control for potential confounding factors such as socioeconomic status; and (iii) examine potential moderating and mediating influences.

Vigorous Physical Work and Obesity?-the Paradox of the Californian Farmworker Population

A good understanding of underlying causes of obesity prevalence in the farmworker population is critical in finding effective strategies to fight obesity and related chronic diseases. There is growing evidence that the population of farmworkers fares poorly with regard to health status, but available data on obesity levels and related chronic diseases is scarce or missing. This study examined the prevalence of overweight and obesity among a sample of farmworker population in California. Results of the regression model indicate that along with demographic variables such as age and gender, several lifestyle and behavioral risk factors are associated with obesity of the farmworkers. Results from this study will inform the design of intervention efforts and policies to help improve the health status of the farmworker population at the community level and beyond.

Risk Factors for Overweight and Obesity among Mexican Children in New York

This paper analyses the risk factors for being overweight or obese among the children of Mexican migrants in the United States. It draws on a qualitative study consisting of in-depth interviews and participant observation with 30 parents in New York State. Findings indicate risks related to nutritional deficiencies and food insecurity before migration, adaptation to US lifestyles, and the cultural tendency to value being overweight as a sign of greater health and higher socioeconomic status. Findings also show that mothers use various strategies to resist the excessive consumption of fast food, yet they simultaneously experience dilemmas around the family’s consumption due to the gender norm that women are responsible for children’s diet.

Endocrine disruptors alter social behaviors and indirectly influence social hierarchies via changes in body weight

BACKGROUND

In humans, the causal link between socioeconomic status (SES) and body weight (BW) is bidirectional, as chronic stress associated with low SES may increase risk of obesity and excess weight may worsen career opportunities resulting in lower SES. We hypothesize that environmental factors affecting BW and/or social stress might reprogram physiological and social trajectories of individuals.

OBJECTIVES

To analyze interactions between BW and social behaviors in mice perinatally exposed to one of several environmental endocrine disruptors.

METHODS

CD-1 mice were fed 0.2 mg/kg BW/day tetrabromobisphenol-A (TBBPA), 2,2,4,4-tetrabromodiphenyl ether (BDE-47), bisphenol S (BPS), or oil (vehicle) from pregnancy day 8 through postpartum day 21. Three male offspring (triad) from each litter were housed together until week 15 and subjected to a Sociability Test and Tube Tests. Cages were then rearranged so that animals of the same social rank from the four exposure groups were housed together in tetrads. Social hierarchy in tetrads was again analyzed by Tube Tests.

RESULTS

In Sociability Tests, the mean velocity of all exposed animals increased when they encountered a stranger mouse and less time was spent with conspecifics. BW and social dominance of animals in triads and tetrads were inversely associated. BDE-47 and BPS caused transient decreases in BW.

CONCLUSIONS

Developmental exposure to environmental xenobiotics shifted behavior towards increased anxiety and decreased interest in social interactions. Our mouse model reproduces negative associations between social hierarchy status and BW. These results suggest that manipulation of BW by endocrine disruptors may affect social ranking.

Emotional Testimonies: An Ethnographic Study of Emotional Suffering Related to Migration from Mexico to Arizona

It is increasingly argued that social and economic inequities poorly affect overall health. One of the means through which these inequities are translated to the body is via negative emotions, which carry known psychological and physiological responses. This paper examines migration-related psychosocial stressors impacting first-generation Mexican immigrants in southern Arizona, and reports on the primary emotional experiences immigrants associate with these stressors. Data were drawn from a qualitative, ethnographic study conducted over the course of 14 months during 2013-2014 with first-generation Mexican immigrants (N = 40) residing in Tucson Arizona and service providers working directly in the immigrant community (N = 32). Results indicate that the primary structural vulnerabilities that cause emotional hardship among immigrants are pre-migration stressors and adversity, dangerous border crossings, detention and deportation, undocumented citizenship status, family separation, and extreme poverty. Many of these factors have intensified over the past decade due to increased border security and state level anti-immigrant legislation in Arizona. Immigrants connected these hardships to the emotions of trauma (50%), fear (65%), depression (75%), loneliness (75%), sadness (80%), and stress (85%), and most respondents reported suffering from three or more of these emotions. Given the heavy emotional toll of migration and the direct impact that regional legislation and border security had on well-being, this paper argues that emotion be considered an important mechanism for health declines in the immigrant community. In order to stem the frequency and intensity of emotional stress in the Mexican immigrant community in Tucson, it is imperative to support organizations and policies that promote community building and support networks and also expand access to and availability of mental health services for immigrants regardless of documentation status.

Prevalence of obesity by occupation among US workers: the National Health Interview Survey 2004-2011

OBJECTIVE

To estimate the prevalence of obesity and the change of prevalence of obesity between 2004-2007 and 2008-20011 by occupation among US workers in the National Health Interview Survey.

METHODS

Self-reported weight and height were collected and used to assess obesity (body mass index ≥ 30 kg/m). Gender-, race/ethnicity-, and occupation-specific prevalence of obesity were calculated.

RESULTS

Prevalence of obesity steadily increased from 2004 through 2008 across gender and race/ethnicity but leveled off from 2008 through 2011. Non-Hispanic black female workers in health care support (49.2%) and transportation/material moving (46.6%) had the highest prevalence of obesity. Prevalence of obesity in relatively low-obesity (white-collar) occupations significantly increased between 2004-2007 and 2008-2011, whereas it did not change significantly in high-obesity (blue-collar) occupations.

CONCLUSIONS

Workers in all occupational categories are appropriate targets for health promotion and intervention programs to reduce obesity.