The Role of Social Support and the Neighborhood Environment on Physical Activity in Low-income, Mexican-American Women in South Texas.

OBJECTIVES: To determine the relationships between physical activity (PA), the neighborhood environment support for PA, and social support for PA among Mexican-American women living in South Texas. The Enlace study was a randomized controlled trial that tested the effectiveness of a promotora-led PA intervention among low-income Mexican origin women (n=614) living in colonias. METHODS: The dependent measures included accelerometer-measured average moderate to vigorous physical activity (MVPA) and sedentary breaks and the Community Health Activities Model Program for Seniors PA 41-item questionnaire. The independent measures included the Physical Activity and Neighborhood Environment Scale (PANES) and the 13-item Physical Activity Social Support (PASS) scale. RESULTS: Enlace participants were on average 40.4 (standard deviation, 10.3) years old, born in Mexico (86.1%), and uninsured (83.1%). Adjusted linear regression results indicated that each 1-point increment in the PANES overall score was associated with 0.050 (p<0.001) unit increase in sedentary break and a -0.043 (p=0.001) unit decrease in sedentary break duration. Both PANES (ß=0.296; p=0.002) and PASS scores (ß=0.076; p<0.001) were associated with weekly average self-reported MVPA. Interaction effects were observed between PASS scores and accelerometer-measured frequency of sedentary breaks and sedentary time duration. CONCLUSIONS: The findings of this study indicate that the relationships between PA and built environment and social support are measure-dependent and suggest that reducing sedentary time in this population may require a closer assessment of social support for PA.

Evaluation of Healthy Fit: A Community Health Worker Model to Address Hispanic Health Disparities.

INTRODUCTION: Hispanics in the United States have disproportionately high rates of obesity, hypertension, and diabetes and poorer access to preventive health services. Healthy Fit uses community health workers to extend public health department infrastructure and address Hispanic health disparities related to cardiovascular disease and access to preventive health services. We evaluated the effectiveness of Healthy Fit in 1) reaching Hispanic Americans facing health disparities, and 2) helping participants access preventive health services and make behavior changes to improve heart health. METHODS: Community health workers recruited a sample of predominantly low-income Hispanic immigrant participants (N = 514). Following a health screening, participants received vouchers for breast, cervical, and colorectal cancer screening, and received vaccinations as needed for influenza, pneumonia, and human papillomavirus. Participants who were overweight or had high blood pressure received heart health fotonovelas and referrals to community-based exercise activities. Community health workers completed follow-up phone calls at 1, 3, and 6 months after the health screening to track participant uptake on the referrals and encourage follow-through. RESULTS: Participants faced health disparities related to obesity and screening for breast, cervical, and colorectal cancer. Postintervention completion rates for breast, cervical, and colorectal cancer screening were 54%, 43%, and 32%, respectively, among participants who received a voucher and follow-up phone call. Among participants with follow-up data who were overweight or had high blood pressure, 70% read the fotonovela, 66% completed 1 or more heart health activities in the fotonovela, 21% attended 1 or more community-based exercise activities, and 79% took up some other exercise on their own. CONCLUSION: Healthy Fit is a feasible and low-cost strategy for addressing Hispanic health disparities related to cancer and cardiovascular disease.

Financial Barriers to Health Care Among Mexican Americans With Chronic Disease and Depression or Anxiety in El Paso, Texas.

PURPOSE: To determine the barriers to health care access by chronic disease and depression/anxiety diagnosis in Mexican Americans living in El Paso, TX. DESIGN: A secondary analysis was conducted using data for 1,002 Hispanics from El Paso, TX (2009-2010). Logistic regression was conducted for financial barriers by number of chronic conditions and depression/anxiety diagnosis. Interaction models were conducted between number of chronic conditions and depression or anxiety. RESULTS: Depressed/anxious individuals reported more financial barriers than those with chronic conditions alone. There were significant interactions between number of chronic conditions and depression/anxiety for cost, denied treatment because of an inability to pay, and an inability to pay $25 for health care. CONCLUSION: Financial barriers should be considered to maintain optimal care for both mental and physical health in this population. IMPLICATIONS FOR PRACTICE: There should be more focus on the impact of depression or anxiety as financial barriers to compliance.

Insurance Status Is a Greater Barrier Than Income or Acculturation to Chronic Disease Screening in the Mexican Origin Population in El Paso, Texas.

The purpose of this study was to determine the association between income, insurance status, acculturation, and preventive screening for diabetes, high blood pressure, and cholesterol in Mexican American adults living in El Paso, Texas. This is a secondary data analysis using data from El Paso, Texas, that was collected between November 2007 and May 2009. Bivariate and stepwise regression analysis was used to determine the relationships between income, insurance, and acculturation factors on preventive screenings. Findings indicate that insurance status was associated with blood pressure check, blood sugar check, cholesterol screening, and any preventive screening. The association for income $40,000 + was explained by insurance. The only significant acculturation variable was language use for cholesterol. Disparities in preventive health screening in Mexican Americans were associated with primary insurance coverage in El Paso, Texas. With the border region being among the most medically underserved and underinsured areas in the United States, the results from this study suggest policy efforts are essential to ensure equal access to resources to maintain good health. Intervention efforts may include increasing awareness of enrollment information for insurance programs through the Affordable Care Act.

Preventive health screening utilization in older Mexicans before and after healthcare reform.

OBJECTIVE: To assess changes in preventive screening utilization in older Mexicans, pre- and post-Seguro Popular. MATERIALS AND METHODS: Data from the Mexican Health and Aging Study (MHAS/Enasem) 2001 and 2012 were used. Logistic and ordinary least squares regression adjusted models were used to predict preventive care in 2012 by insurance status categories in 2001-2012, as the focus explanatory variable. RESULTS: Participants who were uninsured in 2001 and had Seguro Popular in 2012 were significantly more likely to be tested for diabetes, high blood pressure and receive a tetanus shot than the continually uninsured. CONCLUSIONS: While disparities in preventive screening between the insured and uninsured continue to exist in Mexico, Seguro Popular seems to have provided better access to health services to prevent chronic and infectious diseases for the otherwise uninsured population.

A border versus non-border comparison of food environment, poverty, and ethnic composition in Texas urban settings.

PURPOSE: The goal was to examine the relationship between the food environment and selected socioeconomic variables and ethnic/racial makeup in the eight largest urban settings in Texas so as to gain a better understanding of the relationships among Hispanic composition, poverty, and urban foodscapes, comparing border to non-border urban environments. METHODS: Census-tract level data on (a) socioeconomic factors, like percentage below the poverty line and number of households on foodstamps, and (b) ethnic variables, like percent of Mexican origin and percent foreign born, were obtained from the U.S. Census. Data at the census-tract level on the total number of healthy (e.g., supermarkets) and less-healthy (e.g., fast food outlets) food retailers were acquired from the CDC's modified retail food environment index (mRFEI). Variation among urban settings in terms of the relationship between mRFEI scores and socioeconomic and ethnic context was tested using a mixed-effect model, and linear regression was used to identify significant factors for each urban location. A jackknife variance estimate was used to account for clustering and autocorrelation of adjacent census tracts. RESULTS: Average census-tract mRFEI scores exhibited comparatively small variation across Texas urban settings, while socioeconomic and ethnic factors varied significantly. The only covariates significantly associated with mRFEI score were percent foreign born and percent Mexican origin. Compared to the highest-population county (Harris, which incorporates most of Houston), the only counties that had significantly different mRFEI scores were Bexar, which is analogous to San Antonio (2.12 lower), El Paso (2.79 higher), and Neuces, which encompasses Corpus Christi (2.90 less). Significant interaction effects between mRFEI and percent foreign born (El Paso, Tarrant - Fort Worth, Travis - Austin), percent Mexican origin (Hidalgo - McAllen, El Paso, Tarrant, Travis), and percent living below the poverty line (El Paso) were observed for some urban settings. Percent foreign born and percent Mexican origin tended to be positively associated with mRFEI in some locations (Hidalgo, El Paso) and negatively associated in others (Tarrant, Travis). DISCUSSION: Findings are consistent with other studies that suggest the effects of Hispanic concentration on the foodscape may be positive (beneficially healthy) in border urban settings and negative in non-border. The evidence implies that the effects of Hispanic ethnic composition on the food environment are location-dependent, reflecting the unique attributes (e.g., culture, infrastructure, social networks) of specific urban settings.

Preventive health screening utilization in older Mexicans before and after healthcare reform / Revisiones preventivas de salud en adultos mayores mexicanos antes y después de la reforma en salud

Objective. To assess changes in preventive screening utilization in older Mexicans, pre- and post-Seguro Popular. Materials and methods. Data from the Mexican Health and Aging Study (MHAS/Enasem) 2001 and 2012 were used. Logistic and ordinary least squares regression adjusted models were used to predict preventive care in 2012 by insurance status categories in 2001-2012, as the focus explanatory variable. Results. Participants who were uninsured in 2001 and had Seguro Popular in 2012 were significantly more likely to be tested for diabetes, high blood pressure and receive a tetanus shot than the continually uninsured. Conclusions. While disparities in preventive screening between the insured and uninsured continue to exist in Mexico, Seguro Popular seems to have provided better access to health services to prevent chronic and infectious diseases for the otherwise uninsured population.

Objetivo. Evaluar los cambios en el uso de pruebas preventivas en adultos mayores mexicanos, antes y después de haber adquirido el Seguro Popular. Material y métodos. Los datos utilizados provienen del Estudio Nacional de Salud y Envejecimiento en México (Enasem) 2001 y 2012. Se utilizaron modelos de regresión logística y mínimos cuadrados ordinarios, ajustados para predecir la atención preventiva en 2012, de acuerdo con el status de los seguros durante el periodo 2001 -2012 como la variable explicativa de enfoque. Resultados. Los participantes que no tenían seguro en 2001 y tuvieron Seguro Popular en 2012 fueron significativamente más propensos a hacerse las pruebas de diabetes y de presión arterial alta, así como a recibir la vacuna contra el tétanos, que aquéllos que no tenían un seguro continuo. Conclusiones. Las desigualdades en la detección preventiva entre los asegurados y los no asegurados seguirán existiendo en México. El Seguro Popular parece haber proporcionado un mejor acceso a servicios de salud para prevenir enfermedades.

Concurrent fetal exposure to multiple environmental chemicals along the U.S.-Mexico border: an exploratory study in Brownsville, Texas.

There is mounting concern that cumulative exposure to diverse chemicals in the environment may contribute to observed adverse health outcomes in the Lower Rio Grande Valley of Texas. To investigate this situation, biomarker concentrations of organochlorine (OC) pesticides/metabolites, polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs) were measured in maternal and umbilical cord blood from pregnant Hispanic women in Brownsville, TX. Results show that both mothers and fetuses were exposed concurrently to a variety of relatively low-level, hazardous environmental chemicals. Approximately 10% of the blood specimens had comparatively high concentrations of specific OC pesticides, PCBs and PAHs. Because many pregnant women in Brownsville live in socioeconomically-disadvantaged and environmentally-challenging circumstances, there is appropriate concern that exposure to these exogenous substances, either individually or in combination, may contribute to endemic health problems in this population, including cardiovascular disease, obesity, and diabetes. The challenge is to identify individuals at highest comparative risk and then implement effective programs to either prevent or reduce cumulative exposures that pose significant health-related threats.

Socioeconomic context and the food landscape in Texas: results from hotspot analysis and border/non-border comparison of unhealthy food environments.

PURPOSE: The purpose of this paper is to describe the food landscape of Texas using the CDC's Modified Retail Food Environment (mRFEI) and to make comparisons by border/non-border. METHODS: The Modified Retail Food Environment index (mRFEI (2008)) is an index developed by the CDC that measures what percent of the total food vendors in a census track sell healthy food. The range of values is 0 (unhealthy areas with limited access to fruits and vegetables) to (100-Healthy). These data were linked to 2010 US Census socioeconomic and ethnic concentration data. Spatial analysis and GIS techniques were applied to assess the differences between border and non-border regions. Variables of interest were mRFEI score, median income, total population, percent total population less than five years, median age, % receiving food stamps, % Hispanic, and % with a bachelor degree. RESULTS: Findings from this study reveal that food environment in Texas tends to be characteristic of a "food desert". Analysis also demonstrates differences by border/non-border location and percent of the population that is foreign born and by percent of families who receive food stamps. CONCLUSIONS: Identifying the relationship between socioeconomic disparity, ethnic concentration and mRFEI score could be a fundamental step in improving health in disadvantage communities, particularly those on the Texas-Mexico border.

English language proficiency and physical activity among Mexican-origin women in South Texas and South Carolina.

OBJECTIVES: To examine the relationship between English language proficiency (ELP), physical activity, and physical activity-related psychosocial measures (i.e., exercise self-efficacy, exercise social support, perceptions of environmental supports) among Mexican-origin women in South Carolina and Texas. DESIGN: Adjusted robust regression and interaction modeling to evaluate baseline questionnaire data on self-reported ELP with CHAMPS leisure-time moderate-to-vigorous physical activity (MVPA), accelerometry data, Physical Activity Self-Efficacy, Physical Activity Social Support, and Environmental Support for Physical Activity in 118 Mexican-origin women. RESULTS: The adjusted regression revealed a significant association between ELP and perceived physical activity self-efficacy (ß = 234.2, p = .004), but not with physical activity social support. In South Carolina, CHAMPS leisure-time MVPA (411.4 versus 114.3 minutes, p < .05) was significantly different between women in the high ELP quartile and those in the very low quartile. Among high ELP Mexican-origin women, participants in Texas reported significantly higher MVPA measured by accelerometry (p = .042) than those in South Carolina. CONCLUSION: Our findings indicate that ELP was associated with physical activity and that contextual factors may also play a role.

Border health in the shadow of the Hispanic paradox: issues in the conceptualization of health disparities in older Mexican Americans living in the Southwest.

Mexican Americans have demonstrated lower than what would be expected mortality rates and disease prevalence, given their overrepresentation among those living in poverty. However, Mexican Americans living along the US-Mexico border have been documented as carrying a higher burden of disease and disability that seems to contradict or at least challenge evidence in support of a "Hispanic Paradox". The purpose of this paper is to evaluate the concept of border health as it relates to the conceptualization and measurement of health outcomes in older Mexican Americans living in the Southwest United States. Data for this study comes from the Hispanic Established Populations for the Epidemiologic Studies of the Elderly (Hispanic EPESE) wave 1 and mortality files up to wave 5. Border residence was determined using La Paz Agreement county and distance from a port of entry classifications. Statistical analysis was conducted to assess border versus non-border differences in cause of death, disability, disease prevalence and premature mortality. Adjusted regression models were used to predict cause of death, disability and disease-free life expectancy and premature mortality (i.e. occurring before life expectancy). Interaction models between border/non-border and median income were also performed. Finally, distance from the US-Mexico border was used to determine the effect of distance to the US-Mexico border in border-residing participants. The findings from this study indicate that participants in the HEPESE were more likely to be alive at Wave 5 if they resided in a border county, however more likely to transition into ADL disability status. These findings were not explained by behaviors, duration in the US or sociocultural characteristics of where they lived. Additionally, Hispanic EPESE subjects that lived in the border region were more likely to have died from old age and were less likely to be lost to follow up. Interaction models revealed significant effects for diabetes as a cause of death. Moreover, distance from a US-Mexico port of entry was significant for being alive at wave 5 for border-residing participants. Relative to non-border residing participants, border residing Mexican Americans in the Hispanic EPESE did not carry a uniformly higher burden of disease, however had a significantly greater odds of 10 year survival. These findings bring up issues of measurement and the importance of geographic location when it comes to evaluating disease burden and mortality in Mexican Americans.

Application of a novel method for assessing cumulative risk burden by county.

The purpose of this study is to apply the Human Security Index (HSI) as a tool to detect social and economic cumulative risk burden at a county-level in the state of Texas. The HSI is an index comprising a network of three sub-components or "fabrics"; the Economic, Environmental, and Social Fabrics. We hypothesized that the HSI will be a useful instrument for identifying and analyzing socioeconomic conditions that contribute to cumulative risk burden in vulnerable counties. We expected to identify statistical associations between cumulative risk burden and (a) ethnic concentration and (b) geographic proximity to the Texas-Mexico border. Findings from this study indicate that the Texas-Mexico border region did not have consistently higher total or individual fabric scores as would be suggested by the high disease burden and low income in this region. While the Economic, Environmental, Social Fabrics (including the Health subfabric) were highly associated with Hispanic ethnic concentration, the overall HSI and the Crime subfabric were not. In addition, the Education, Health and Crime subfabrics were associated with African American racial composition, while Environment, Economic and Social Fabrics were not. Application of the HSI to Texas counties provides a fuller and more nuanced understanding of socioeconomic and environmental conditions, and increases awareness of the role played by environmental, economic, and social factors in observed health disparities by race/ethnicity and geographic region.

Polycyclic aromatic hydrocarbons in maternal and umbilical cord blood from pregnant Hispanic women living in Brownsville, Texas.

Venous blood was drawn from 35 pregnant Hispanic women living in Brownsville, Texas, and matched cord blood was collected at birth. Gas chromatography/mass spectrometry was used to measure concentrations of 55 individual PAHs or groups of PAHs. Results indicate that these women and their fetuses were regularly exposed to multiple PAHs at comparatively low concentrations, with levels in cord blood generally exceeding levels in paired maternal blood. While the possibility of related adverse effects on the fetus is uncertain, these exposures in combination with socioeconomically-disadvantaged and environmentally-challenging living conditions raise legitimate public health concerns.

Nativity and nutritional behaviors in the Mexican origin population living in the US-Mexico border region.

The purpose of this study is to determine the relationship between nativity and nutritional behaviors and beliefs in the Mexican American population living in the South Texas border region. Mexican Americans living the border region of South Texas were sampled to assess their nutrition behaviors and beliefs. Nativity was measured as whether subjects were born in the United States or Mexico. Nutritional behaviors were measured using the SPAN and indexes were used to measure barriers to good nutrition, dietary self-efficacy, and dietary importance. OLS regression analysis was used and adjustments were made for sociodemographic factors. Differences between US-born Mexican Americans and Mexico-born Mexican Americans existed in nutritional beliefs, but not in behaviors. Mexico-born Mexican Americans reported their dietary choices as more important and reported greater food self-efficacy than their US-born Mexican American counterparts. Socioeconomic status influenced US-born Mexican Americans nutritional beliefs only and the same effect was not observed for Mexico-born Mexican Americans. Despite low levels of overall acculturation in the border region dietary beliefs still exist between immigrants and US-born Mexican Americans in dietary beliefs, but, not behaviors in US-born Mexican Americans.

English language use, health and mortality in older Mexican Americans.

The purpose of this study is to determine if English language use is associated with smoking, diabetes, hypertension, limitations in Activities of Daily Living (ADL), and 12-year mortality in older Mexican Americans. Using data from a cohort of 3,050 Mexican Americans aged 65 years and older, we examined prevalence of 4 health indicators and survival over 12 years of follow-up by English language use. English language use is associated with increased odds of hypertension in men, independent of nativity and sociodemographic control variables. Among women, English language use is associated with lower odds of ADL limitations and increased odds of smoking. The associations for women were partially explained by occupational status and nativity. After adjusting for health conditions, sociodemographics, and nativity, English language use was associated with increased mortality among men. Interaction terms revealed that for both men and women, higher English language use was associated with mortality for respondents with the highest level of income only. English language use is a predictor of health and mortality in older Mexican Americans separate from country of birth.

The rural-urban divide: health services utilization among older Mexicans in Mexico.

CONTEXT: Mexico. PURPOSE: Using the health care service utilization model as a framework, this paper will analyze the differences in health care service use among older Mexicans living in urban and rural areas in Mexico. METHODS: The Mexican Health and Aging Survey (MHAS) data were used to test the applicability of Andersen's "model of health services" of predisposing (ie, age, sex, etc.), enabling (education, insurance coverage, etc.) and need factors (diabetes, hypertension, etc.) to predict ever being in the hospital and physician visits in the past year by place of residence (urban, rural, semi-rural). FINDINGS: Results showed that older Mexicans living in the most rural areas (populations of 2,500 or fewer) were significantly less likely to have been hospitalized in the previous year and visited the physician less often (P < .0001) than their urban counterparts. The significant difference in hospitalization between rural and urban residing older Mexicans was largely accounted for by having health care coverage. Certain need factors such as diabetes, previous heart attack, hypertension, depression, and functional limitations predicted frequency of physician visits and hospitalization, but they did not explain variations between rural and urban older Mexicans. CONCLUSIONS: Not having insurance coverage was associated with a lower likelihood of spending an overnight visit in the hospital and visiting a physician for older Mexicans. This lower utilization may be due to barriers to access rather than better health.

Socioeconomic status and prevalence of obesity and diabetes in a Mexican American community, Cameron County, Texas, 2004-2007.

INTRODUCTION: Mexican Americans are at increased risk for obesity and diabetes. We established a cohort on the United States-Mexico border to determine the prevalence of obesity and diabetes in this Mexican American population and to see whether minor economic advantages had any effect on health. METHODS: We randomly selected and extensively documented 810 people aged 35 to 64 years. Weighted data were analyzed to establish prevalence of obesity and diabetes and other markers of poor health such as elevated glycated hemoglobin levels. RESULTS: Rates of obesity (body mass index > or = 30 kg/m(2)) were 57% in the first (lower) of 4 socioeconomic strata by income and were 55.5% in the third (higher). People in the higher socioeconomic stratum were significantly less likely to have undiagnosed diabetes (2% vs 9%). Among people aged 55 to 64 years, rates of diabetes were significantly higher among those in the lower socioeconomic stratum than among those in the higher stratum. Rates of undiagnosed diabetes had similar differences. Approximately three-fourths of the respondents reported having no health insurance, and we found no difference between people in different socioeconomic strata. CONCLUSION: Rates of obesity and diabetes in this border community are among the highest in the United States. Belonging to the lower socioeconomic stratum significantly increased the likelihood of having undiagnosed diabetes and, in patients too young to be eligible for Medicare, the overall risk of developing diabetes. Modest improvement in income has a beneficial effect on health in this racial/ethnic minority community.

Allostatic load among non-Hispanic Whites, non-Hispanic Blacks, and people of Mexican origin: effects of ethnicity, nativity, and acculturation.

OBJECTIVES: We investigated ethnic differences in allostatic load in a population-based sample of adults living in Texas City, TX, and assessed the effects of nativity and acculturation status on allostatic load among people of Mexican origin. METHODS: We used logistic regression models to examine ethnic variations in allostatic load scores among non-Hispanic Whites, non-Hispanic Blacks, and people of Mexican origin. We also examined associations between measures of acculturation and allostatic load scores among people of Mexican origin only. RESULTS: Foreign-born Mexicans were the least likely group to score in the higher allostatic load categories. Among individuals of Mexican origin, US-born Mexican Americans had higher allostatic load scores than foreign-born Mexicans, and acculturation measures did not account for the difference. CONCLUSIONS: Our findings expand on recent research from the National Health and Nutrition Examination Survey with respect to ethnicity and allostatic load. Our results are consistent with the healthy immigrant hypothesis (i.e., newer immigrants are healthier) and the acculturation hypothesis, according to which the longer Mexican immigrants reside in the United States, the greater their likelihood of potentially losing culture-related health-protective effects.

Tapping healthcare resource by older Mexicans with diabetes: how migration to the United States facilitates access.

This study employs semi-structured interviews conducted in two small migrant towns in Michoacán, Mexico to determine how older Mexicans with diabetes access healthcare and treatment. Barriers in access to healthcare services are identified as well as how family members and migration are utilized to offset these limitations. Results indicate that former migrants who were economically successful in the USA have greater options in the type of services they are able to use. In addition, residents with diabetes who have family members living in the USA receive remittances in the form of money and medical supplies that aid in the treatment of their illness. Implications for policy are discussed.

Work experience and gender differences in chronic disease risk in older Mexicans.

PURPOSE: The purpose of this study is to examine the relationship between labor force participation and gender differences in the prevalence of arthritis, diabetes, and hypertension. METHODS: The Mexican Health and Aging Survey (MHAS) data is nationally representative sample of older Mexicans 50 years and older. Binomial logistic regression models were performed to examine differences between older Mexican men and women in the prevalence of arthritis, diabetes, and hypertension. Interaction effects were also estimated between gender and occupation, length of time in the labor force, and pension eligibility. RESULTS: Older Mexican women have a significantly greater risk of having arthritis, diabetes, and hypertension. Findings from this study suggest that within the same occupational classification, women suffer from the damaging effects on health to a greater extent than men. Interaction effects show that women who work in services or in client's home are particularly susceptible to arthritis. Moreover, women who work in sales were at a significantly greater risk of hypertension than men. CONCLUSIONS: Older Mexican women are at greater risk of chronic disease and part of their vulnerability is a result of the type of work that they do.