Disability Among Older Immigrants in the United States: Exploring Differences by Region of Origin and Gender.

Rapid aging in American society will be disproportionately concentrated among the foreign-born. Immigrants in the United States (U.S.) are a heterogeneous population, yet little is known regarding their differences in disability later in life by region of origin. We use data from the National Health Interview Survey on respondents ages 60+ (n = 313,072) and employ gender-specific logistic models to predict reports of any activity of daily living (ADL) disability. After accounting for socioeconomic factors, compared to their U.S.-born non-Hispanic (NH) White counterparts, the odds of reporting ADL disability were higher among U.S.-born respondents that are Hispanic, NH Black, and NH Multiracial as well as respondents with Mexican, Puerto Rican, Cuban, Russian/former Soviet, Middle Eastern, East Asian, and South Asian origins. Also, Dominican, African, and Southeast Asian women-and European men-reported high odds of ADL disability. Our results highlight heterogeneity in the disability profiles of foreign-born older adults in the U.S..

Sensory Disabilities and Social Isolation Among Hispanic Older Adults: Toward Culturally Sensitive Measurement of Social Isolation.

OBJECTIVES: Sensory disabilities, including vision disability and hearing disability, increase risk for social isolation, which is associated with multiple negative health outcomes. Existing literature suggests that the cultural value of familism may provide a buffer against social isolation. We examined the longitudinal trajectory of social isolation among Hispanic older adults with self-reported vision disability (SRVD) and self-reported hearing disability and tested a modified measure of social isolation incorporating familism. METHODS: We compared 8-year trajectories of social isolation among Hispanics (n = 445) and non-Hispanic Whites (n = 4,861) from the National Health and Aging Trends Study. We used structural equation modeling to explore the longitudinal relationships between sensory disability and social isolation while comparing 2 measures of social isolation. RESULTS: Social isolation increased longitudinally for both groups, with SRVD significantly associated with higher initial levels. Social isolation started and remained higher across time among Hispanics. Using an adjusted measure of social isolation (added familial support), neither initial levels nor trajectories of social isolation differed between Hispanic and non-Hispanic White participants. DISCUSSION: Initially, Hispanics appeared more socially isolated, reporting less social support from outside the home. Yet, we found that they were more likely to report family social connections. Traditional measures of social isolation focusing on social support outside of the home (neglecting support by family) may lack content validity among Hispanic groups. Culturally sensitive measures of social isolation will be increasingly consequential for future research and health policy to meet the needs of a diverse older population.

Healthcare utilization and costs among high-need and frail Mexican American Medicare beneficiaries.

OBJECTIVES: To examine Medicare health care spending and health services utilization among high-need population segments in older Mexican Americans, and to examine the association of frailty on health care spending and utilization. METHODS: Retrospective cohort study of the innovative linkage of Medicare data with the Hispanic Established Populations for the Epidemiologic Study of the Elderly (H-EPESE) were used. There were 863 participants, which contributed 1,629 person years of information. Frailty, cognition, and social risk factors were identified from the H-EPESE, and chronic conditions were identified from the Medicare file. The Cost and Use file was used to calculate four categories of Medicare spending on: hospital services, physician services, post-acute care services, and other services. Generalized estimating equations (GEE) with a log link gamma distribution and first order autoregressive, correlation matrix was used to estimate cost ratios (CR) of population segments, and GEE with a logit link binomial distribution was applied to estimate odds ratios (OR) of healthcare use. RESULTS: Participants in the major complex chronic illness segment who were also pre-frail or frail had higher total costs and utilization compared to the healthy segment. The CR for total Medicare spending was 3.05 (95% CI, 2.48-3.75). Similarly, this group had higher odds of being classified in the high-cost category 5.86 (95% CI, 3.35-10.25), nursing home care utilization 11.32 (95% CI, 3.88-33.02), hospitalizations 4.12 (95% CI, 2.88-5.90) and emergency room admissions 4.24 (95% CI, 3.04-5.91). DISCUSSION: Our findings highlight that frailty assessment is an important consideration when identifying high-need and high-cost patients.

Documentation of Dementia as a Cause of Death Among Mexican-American Decedents Diagnosed with Dementia.

BACKGROUND: Hispanic older adults are a high-risk population for Alzheimer's disease and related dementias (ADRD) but are less likely than non-Hispanic White older adults to have ADRD documented as a cause of death on a death certificate. OBJECTIVE: To investigate characteristics associated with ADRD as a cause of death among Mexican-American decedents diagnosed with ADRD. METHODS: Data came from the Hispanic Established Populations for the Epidemiologic Study of the Elderly, Medicare claims, and National Death Index. RESULTS: The final sample included 853 decedents diagnosed with ADRD of which 242 had ADRD documented as a cause of death. More health comorbidities (OR = 0.40, 95% CI = 0.28-0.58), older age at death (OR = 1.18, 95% CI = 1.03-1.36), and longer ADRD duration (OR = 1.08, 95% CI = 1.03-1.14) were associated with ADRD as a cause of death. In the last year of life, any ER admission without a hospitalization (OR = 0.45, 95% CI = 0.22-0.92), more physician visits (OR = 0.96, 95% CI = 0.93-0.98), and seeing a medical specialist (OR = 0.46, 95% CI = 0.29-0.75) were associated with lower odds for ADRD as a cause of death. In the last 30 days of life, any hospitalization with an ICU stay (OR = 0.55, 95% CI = 0.36-0.82) and ER admission with a hospitalization (OR = 0.67, 95% CI = 0.48-0.94) were associated with lower odds for ADRD as a cause of death. Receiving hospice care in the last 30 days of life was associated with 1.98 (95% CI = 1.37-2.87) higher odds for ADRD as a cause of death. CONCLUSION: Under-documentation of ADRD as a cause of death may reflect an underestimation of resource needs for Mexican-Americans with ADRD.

Changes in Health Care Use by Mexican American Medicare Beneficiaries Before and After a Diagnosis of Dementia.

BACKGROUND: Evidence from predominantly non-Hispanic White cohorts indicates health care utilization increases before Alzheimer's disease and related dementias (ADRD) is diagnosed. We investigated trends in health care utilization by Mexican American Medicare beneficiaries before and after an incident diagnosis of ADRD. METHODS: Data came from the Hispanic Established Populations for the Epidemiological Study of the Elderly that has been linked with Medicare claims files from 1999 to 2016 (n = 558 matched cases and controls). Piecewise regression and generalized linear mixed models were used to compare the quarterly trends in any (ie, one or more) hospitalizations, emergency room (ER) admissions, and physician visits for 1 year before and 1 year after ADRD diagnosis. RESULTS: The piecewise regression models showed that the per-quarter odds for any hospitalizations (odds ratio [OR] = 1.62, 95% CI = 1.43-1.84) and any ER admissions (OR = 1.40, 95% CI = 1.27-1.54) increased before ADRD was diagnosed. Compared to participants without ADRD, the percentage of participants with ADRD who experienced any hospitalizations (27.2% vs 14.0%) and any ER admissions (19.0% vs 11.7%) was significantly higher at 1 quarter and 3 quarters before ADRD diagnosis, respectively. The per-quarter odds for any hospitalizations (OR = 0.88, 95% CI = 0.80-0.97) and any ER admissions (OR = 0.89, 95% CI = 0.82-0.97) decreased after ADRD was diagnosed. Trends for any physician visits before or after ADRD diagnosis were not statistically significant. CONCLUSIONS: Older Mexican Americans show an increase in hospitalizations and ER admissions before ADRD is diagnosed, which is followed by a decrease after ADRD diagnosis. These findings support the importance of a timely diagnosis of ADRD for older Mexican Americans.

Frailty transitions predict healthcare use and Medicare payments in older Mexican Americans: a longitudinal cohort study.

BACKGROUND: Little is known regarding the impact of transitions in frailty on healthcare use and payment in older Mexican Americans. We address this gap in knowledge by investigating the effect of early transitions in physical frailty on the use of healthcare services and Medicare payments involving older Mexican Americans. METHODS: Longitudinal analyses were conducted using the Hispanic Established Populations for the Epidemiological Study of the Elderly (Hispanic-EPESE) survey data from five Southwest states linked to the Medicare claims files from the Centers for Medicare and Medicaid Services. Seven hundred and eighty-eight community-dwelling Mexican Americans 72 years and older in 2000/01 were studied. We used a modified Frailty Phenotype (unintentional weight loss, weakness, self-reported exhaustion and slow walking speed) to classify frailty status (non-frail, pre-frail or frail). Each participant was placed into one of 5 frailty transition groups: 1) remain non-frail, 2) remain pre-frail, 3) remain frail, 4) improve (pre-frail to non-frail, frail to non-frail, frail to pre-frail) and 5) worse (non-frail to pre-frail, non-frail to frail, pre-frail to frail). The outcomes for the one-year follow-up period (2000-2001) were: (a) healthcare use (hospitalization, emergency room [ER] admission and physician visit); and (b) Medicare payments (total payment and outpatient payment). RESULTS: Mean age was 78.8 (SD = 5.1) years and 60.3% were female in 1998/99. Males who remained pre-frail (Odds Ratio [OR] = 3.49, 1.13-10.8, remained frail OR = 6.92, 1.61-29.7) and transitioned to worse frail status (OR = 4.49, 1.74-11.6) had significantly higher hospitalization risk compared to individuals who remained non-frail. Males in the 'worsened' groups, and females in the 'improved' groups, had significantly higher Medicare payments than individuals who remained non-frail (Cost Ratio [CR] = 2.00, 1.30-3.09; CR = 1.53, 1.12-2.09, respectively]. CONCLUSIONS: Healthcare use and Medicare payments differed by frailty transition status. The differences varied by sex. Research is necessary to elucidate the relationship between frailty transitions and outcomes, sex difference and Medicare payment for older Mexican Americans living in the community.

Healthcare utilization of Mexican-American Medicare beneficiaries with and without Alzheimer's disease and related dementias.

BACKGROUND: Older adults with Alzheimer's disease and related dementias (ADRD) are high-risk to experience hospitalizations and emergency room (ER) admissions. Mexican-Americans have a high prevalence of ADRD, but there is limited information on the healthcare use of older Mexican-Americans with ADRD. We used data from a cohort of older Mexican-Americans that has been linked with Medicare files to investigate differences in hospitalizations, ER admissions, and physician visits according to ADRD diagnosis. We also identify sociodemographic, health, and functional characteristics that may contribute to differences in healthcare utilization between Mexican-American Medicare beneficiaries with and without an ADRD diagnosis. METHODS AND FINDINGS: Data came from the Hispanic Established Populations for the Epidemiological Study of the Elderly that has been linked with Medicare Master Beneficiary Summary Files, Medicare Provider Analysis and Review files, Outpatient Standard Analytic files, and Carrier files. The final analytic sample included 1048 participants. Participants were followed for two years (eight quarters) after their survey interview. Generalized estimating equations were used to estimate the probability for one or more hospitalizations, ER admissions, and physician visits at each quarter. ADRD was associated with higher odds for hospitalizations (OR = 1.65, 95%CI = 1.29-2.11) and ER admissions (OR = 1.57, 95%CI = 1.23-1.94) but not physician visits (OR = 1.23, 95%CI = 0.91-1.67). The odds for hospitalizations (OR = 1.24, 95%CI = 0.97-1.60) and ER admissions (OR = 1.27, 95%CI = 1.01-1.59) were reduced after controlling for limitations in activities of daily living and comorbidities. CONCLUSIONS: Mexican-American Medicare beneficiaries with ADRD had significantly higher odds for one or more hospitalizations and ER admissions but similar physician visits compared to beneficiaries without ADRD. Functional limitations and comorbidities contributed to the higher hospitalizations and ER admissions for older Mexican-Americans with ADRD.

Differences in hospitalizations, emergency room admissions, and outpatient visits among Mexican-American Medicare beneficiaries.

BACKGROUND: Few studies have investigated the healthcare utilization of Mexican-American Medicare beneficiaries. We used survey data that has been linked with Medicare claims records to describe the healthcare utilization of Mexican-American Medicare beneficiaries, determine common reasons for hospitalizations, and identify characteristics associated with healthcare utilization. METHODS: Data came from wave five (2004/05) of the Hispanic Established Populations for the Epidemiological Study of the Elderly. The final sample included 1187 participants aged ≥75 who were followed for two-years (eight-quarters). Generalized estimating equations were used to estimate the probability of ≥1 hospitalization, emergency room (ER) admissions, and outpatient visits. RESULTS: The percentage of beneficiaries who had ≥1 hospitalizations, ER admissions, and outpatient visits for each quarter ranged from 10.12-12.59%, 14.15-19.03%, and 76.61-80.68%, respectively. Twenty-three percent of hospital discharges were for circulatory conditions and 17% were for respiratory conditions. Hospitalizations for heart failure and simple pneumonia were most common. Older age was associated with significantly higher odds for ER admissions (OR = 1.49, 95% CI = 1.21-1.84) but lower odds for outpatient visits (OR = 0.74, 95% CI = 0.57-0.96). Spanish language and female gender were associated with significantly higher odds for hospitalizations (OR = 1.53, 95% CI = 1.14-2.06) and outpatient visits (OR = 1.82, 95% CI = 1.43-2.33), respectively. Having a middle-school or higher level of education was associated with significantly lower odds for ER admissions (OR = 0.71, 95% CI = 0.56-0.91). Participants who were deceased within two-years had significantly higher odds for hospitalizations (OR = 6.15, 95% CI = 4.79-7.89) and ER admissions (OR = 3.63, 95% CI = 2.88-4.57) than participants who survived at least three-years. CONCLUSION: We observed high healthcare utilization among Mexican-American Medicare beneficiaries. Forty percent of all hospitalizations were for circulatory and respiratory conditions with hospitalizations for heart failure and pneumonia being the most common. Older age, gender, education, language, and mortality were all associated with healthcare utilization. Continued research is needed to identify patterns and clusters of social determinants and health characteristics associated with healthcare utilization and outcomes in older Mexican-Americans.

The Healthy Immigrant Effect and Aging in the United States and Other Western Countries.

The rising number of immigrants to the United States and other western countries has been accompanied by rising interest in the characteristics of immigrants including their mortality risk and health status. In general, immigrants to the United States, Canada, and Australia enjoy a health advantage over the native populations, which has been coined the healthy immigrant effect. The purpose of this review is to summarize findings on aging and the immigrant health effect in the 3 most common immigrant destinations the United States, Canada, Australia, as well as in Europe. Much of the research in the United States has focused on the so-called Hispanic Paradox or the favorable health of Hispanics relative to non-Hispanic whites despite lower average socioeconomic status as well as other risk factors, with recent research beginning to pay attention to dietary and genetic factors. In all 3 countries, there is evidence of a health convergence of immigrants relative to the native-born population over approximately 10-20 years. By the time they reach old age, immigrants experience high rates of comorbidity and disability. Immigrant health selection appears to be the key reason explaining the immigrant health advantage. Immigrants to Europe also appear to be health selected but not as consistently as in the United States, Canada, and Australia. Immigrant enclaves appear to confer health advantages in the United States among older Hispanics but appear to have negative consequences in Europe. More attention needs to be given to the health and health care needs of the rising numbers of refugees to Europe as well as refugees in the Middle East, Africa, and elsewhere.

A Comprehensive Analysis of Morbidity Life Expectancies Among Older Hispanic Subgroups in the United States: Variation by Nativity and Country of Origin.

BACKGROUND AND OBJECTIVES: Although a clear advantage in mortality has been documented among older Hispanic subgroups, particularly the foreign-born, research examining health selectivity in morbidity life expectancies among older Hispanics are scarce. Differences in sociocultural characteristics among Hispanic subgroups may influence racial/ethnic and nativity disparities in morbidity. Research examining the heterogeneity among older Hispanic subgroups may further our understanding of why some Hispanics are able to preserve good health in old age, while others experience a health disadvantage. Thus, the primary goal of this analysis is to examine racial/ethnic, nativity, and country of origin differences in morbidity life expectancies among older adults in the United States. RESEARCH DESIGN AND METHODS: We used individual-level data (1999-2015) from the National Health Interview Survey to estimate Sullivan-based life tables of life expectancies with morbidity and without morbidity by gender for U.S.-born Mexicans, foreign-born Mexicans, U.S.-born Puerto Ricans, island-born Puerto Ricans, foreign-born Cubans, and whites in mid-life (age 50), and late-life (age 65). RESULTS: Hispanics are heterogeneous in morbidity life expectancies. Among females, U.S.-born Mexicans, foreign-born Mexicans, and island-born Puerto Ricans spent more late-life years with morbidity than whites. For men, U.S.-born Puerto Ricans were the only Hispanic subgroup disadvantaged in the number of years lived with morbidity. Conversely, foreign-born Cubans exhibited the healthiest outcomes of all groups, regardless of gender. DISCUSSION AND IMPLICATIONS: Reducing the risk for late-life morbidity must be informed by a comprehensive understanding of a wide range of factors that shape health among older adults. Research should avoid pan-ethnic groupings that overlook important differences in chronic disease risk profiles among Hispanic subgroups. Recognizing the various sociocultural and environmental processes that underlie Hispanic subpopulations is important for development and implementation of social and public health policies aimed at ameliorating negative health outcomes of late-life morbidity among minority and immigrant groups.

The Role of Education in the Relationship Between Age of Migration to the United States and Risk of Cognitive Impairment Among Older Mexican Americans.

Prior research indicates age of migration is associated with cognitive health outcomes among older Mexican Americans; however, factors that explain this relationship are unclear. This study used eight waves from the Hispanic Established Populations for the Epidemiologic Study of the Elderly to examine the role of education in the risk for cognitive impairment (CI) by nativity, age of migration, and gender. Foreign-born women had a higher risk for CI than U.S.-born women, regardless of age of migration. After adjusting for education, this risk remained significant only for late-life migrant women (risk ratio [RR] = 1.28). Foreign-born men who migrated at >50 had significantly higher risk for CI compared to U.S.-born men (RR = 1.33) but not significant after adjusting for education. Findings from a decomposition analysis showed education significantly mediated the association between age of migration and CI. This study highlights the importance of education in explaining the association between age of migration and CI.

Neighborhood perception and self-rated health among Mexican American older adults.

AIM: The aim of the present study was to assess the relationship between neighborhood perception and poor self-rated health among older Mexican Americans, adjusting for important background characteristics, such as neighborhood ethnic composition and other health conditions. METHODS: Drawing on the 2004-2005 Hispanic Established Populations for the Epidemiologic Study of the Elderly data (n = 1780), the present study used logistic regression to examine the effects of neighborhood perception on poor self-rated health of older Mexican Americans. RESULTS: The results show that participants with a greater positive perception of their neighborhood were less likely to report poor self-rated health, controlling for both socioeconomic status and health status covariates. CONCLUSIONS: The findings suggest that positive neighborhood perception serves as an important protective factor in overall health. Geriatr Gerontol Int 2017; 17: 2559-2564.

Changes in depressive symptoms during widowhood among older Mexican Americans: the role of financial strain, social support, and church attendance.

OBJECTIVES: This study examines how depressive symptoms change during the widowhood process among older adults of Mexican descent. This research also investigates whether financial strain, social support, and church attendance moderate changes in depressive symptoms in the context of widowhood. METHOD: This study uses seven waves of data from the Hispanic Established Population for the Epidemiologic Study of the Elderly collected at approximately two-year intervals. This research applies multiphase growth models to examine changes in depressive symptomatology before, during, and after the transition to widowhood (the measurement wave at which spousal bereavement was first reported) among 385 older adults of Mexican descent who experienced the death of a spouse during the survey. RESULTS: This study demonstrates that older adults of Mexican descent experienced a significant increase in depressive symptoms pre-widowhood and in particular, during the transition to widowhood. The levels and rates of changes in depressive symptoms post-widowhood did not differ from the pre-widowhood ones. Greater social support was related to more depressive symptoms during the transition to widowhood. More frequent church attendance was a protective factor against increases in depressive symptoms pre-widowhood. CONCLUSION: This study highlights the multiphase pattern in the effects of the widowhood process on depressive symptomatology among older adults of Mexican descent. The findings also suggest that social support and church attendance can have implications for the interplay between widowhood and depressive symptoms.

Aging and Disability Among Hispanics in the United States: Current Knowledge and Future Directions.

BACKGROUND AND OBJECTIVES: Hispanics are the most rapidly aging minority population in the United States. Our objective is to provide a summary of current knowledge regarding disability among Hispanics, and to propose an agenda for future research. RESEARCH DESIGN AND METHODS: A literature review was conducted to identify major areas of research. A life course perspective and the Hispanic Paradox were used as frameworks for the literature review and for identifying future areas of research. RESULTS: Four research areas were identified: (1) Ethnic disparities in disability; (2) Heterogeneity of the U.S. older Hispanic population; (3) Risk factors for disability; and (4) Disabled life expectancy. Older Hispanics are more likely than non-Hispanic whites to be disabled or to become disabled. Disability varied by country of origin, nativity, age of migration, and duration in the United States. Important risk factors for disability included chronic health conditions, depression, and cognitive impairment. Protective factors included positive affect and physical activity. Older Hispanics have longer life expectancy than non-Hispanic whites but spend a greater proportion of old age disabled. Future research should continue to monitor trends in disability as younger generations of Hispanics reach old age. Attention needs to be given to regional variation within the United States for disability prevalence, early-life risk factors, and factors that may contribute to variation in disabled life expectancy. There is also an urgent need for interventions that can effectively prevent or delay the onset of disability in older Hispanics. DISCUSSION AND IMPLICATIONS: Considerable research has examined disability among older Hispanics, but continued research is needed. It is important that research findings be used to inform public policies that can address the burden of disability for older Hispanic populations.

Declines in Strength and Mortality Risk Among Older Mexican Americans: Joint Modeling of Survival and Longitudinal Data.

BACKGROUND: Grip strength is a noninvasive method of risk stratification; however, the association between changes in strength and mortality is unknown. The purposes of this study were to examine the association between grip strength and mortality among older Mexican Americans and to determine the ability of changes in strength to predict mortality. METHODS: Longitudinal data were included from 3,050 participants in the Hispanic Established Population for the Epidemiological Study of the Elderly. Strength was assessed using a hand-held dynamometer and normalized to body mass. Conditional inference tree analyses were used to identify sex- and age-specific weakness thresholds, and the Kaplan-Meier estimator was used to determine survival estimates across various strata. We also evaluated survival with traditional Cox proportional hazard regression for baseline strength, as well as with joint modeling of survival and longitudinal strength change trajectories. RESULTS: Survival estimates were lower among women who were weak at baseline for only 65- to 74-year-olds (11.93 vs 16.69 years). Survival estimates were also lower among men who were weak at baseline for only ≥75-year-olds (5.80 vs 7.39 years). Lower strength at baseline (per 0.1 decrement) was significantly associated with mortality (hazard ratio [HR]: 1.10; 95% confidence interval [CI]: 1.01-1.19) for women only. There was a strong independent, longitudinal association between strength decline and early mortality, such that each 0.10 decrease in strength, within participants over time, resulted in a HR of 1.12 (95% CI: 1.00-1.25) for women and a HR of 1.15 (95% CI: 1.04-1.28) for men. CONCLUSIONS: Longitudinal declines in strength are significantly associated with all-cause mortality in older Mexican Americans.

The Role of Physical Activity and Physical Function on the Risk of Falls in Older Mexican Americans.

We investigated the relationship between physical activity and physical function on the risk of falls over time in a cohort of Mexican-American adults aged 75 and older from the Hispanic Established Population for the Epidemiologic Study of the Elderly (H-EPESE). Participants were divided into four groups according to their level of physical activity and physical function: low physical activity and low physical function (n = 453); low physical activity and high physical function (n = 54); high physical activity and low physical function (n = 307); and high physical activity and high physical function (n = 197). Using generalized linear equation estimation, we showed that participants with high physical activity and low physical function had a greater fall risk over time, followed by the high physical activity and high physical function group. Participants seldom took part in activities that improve physical function. To prevent falls, modifications to physical activity should be made for older Mexican Americans.

Chamomile Consumption and Mortality: A Prospective Study of Mexican Origin Older Adults.

PURPOSE: Approximately 20% of adults use some kind of herbal; however, little data exists from population-based study or clinical trials to support effectiveness of most herbal products. Chamomile is a commonly used herb among older adults of Mexican origin. We examined the effects of herbal chamomile consumption on mortality among older adults of Mexican origin. METHODS AND DESIGN: A sample from the Hispanic Established Populations for Epidemiologic Study of the Elderly, a population-based study of noninstitutionalized Mexican Americans aged 65 and older from five Southwestern states (Texas, California, New Mexico, Colorado, and Arizona). We included all men and women from 2000 to 2007 (n = 1,677). RESULTS: Chamomile was used by 14% of the sample. Cox proportional hazards regression analyses showed that chamomile was associated with a decreased risk of mortality in the total sample (hazard ratio [HR] 0.71, 95% confidence interval [CI] 0.55-0.92) and for women (HR 0.67, 95% CI 0.49-0.92) but not for men. In models adjusted for sociodemographic variables, health behaviors, and chronic conditions, chamomile remained significantly associated with reduced mortality in women (HR 0.72, 95% CI 0.53-0.98). IMPLICATIONS: The use of chamomile shows protective effects against mortality in this sample of older adults of Mexican origin for women. Further research is warranted in other populations to determine if these effects are consistent.

Association Between Lower Extremity Performance and Health-Related Quality of Life in Elderly Mexican Americans.

OBJECTIVE: To examine the longitudinal association between levels of lower extremity performance (LEP) and health-related quality of life (HRQoL) in older Mexican Americans aged 72 years or older participating in the Hispanic Established Population for the Epidemiological Study of the Elderly (2000-2006). METHOD: LEP was measured in 621 non-institutionalized participants with the Short Physical Performance Battery (SPPB). Participants were divided into high (SPPB score 10-12), intermediate (SPPB score 7-9), and low (SPPB score 0-6) groups based on LEP. HRQoL was assessed using the Medical Outcomes Study Short Form (SF-36), which includes a Physical Composite Scale (PCS) and a Mental Composite Scale (MCS). RESULTS: Participants in the high LEP group had slower rates of decline in the PCS, and those in the intermediate LEP group had slower rates of decline in the MCS score over time. DISCUSSION: Increased LEP was associated with slower rates of decline in physical and mental HRQoL in older Mexican Americans.

Nativity status and sources of care assistance among elderly Mexican-origin adults.

Much like other racial/ethnic groups, Latinos are facing challenges to provide needed care to aging adults. Older Latinos underutilize nursing homes and home health care services and primarily rely on their families for assistance. While this general trend has been established, little attention has been paid to nativity differentials in patterns of caregiving for this segment of the aging population. The analyses are based on the latest wave (Wave 7) of the Hispanic Established Population for Epidemiologic Studies of the Elderly or H-EPESE (2010/2011) a sample of older Mexican-origin adults and their family caregivers living in the southwestern U.S. We examine 629 child caregiver/parent care recipient dyads using bivariate statistics and multinomial logistic regression analyses. The results reveal that while grown children of Mexican-origin elders play a critical role in providing instrumental and financial supports to their aging parents, the burden that the children of foreign-born parents bear is greater. Despite higher rates of disability, Mexican-born elders are more dependent on a child for help and far less likely to call upon other family members, relatives and community based-providers for help than the U.S. born. Given the recent and future growth of older Latinos, intervention strategies will need to focus on nativity status and acculturative processes in the context of caregiving and caregiver burden.

Severe Cognitive Dysfunction and Occupational Extremely Low Frequency Magnetic Field Exposure among Elderly Mexican Americans.

AIMS: This report is the first study of the possible relationship between extremely low frequency (50-60 Hz, ELF) magnetic field (MF) exposure and severe cognitive dysfunction. Earlier studies investigated the relationships between MF occupational exposure and Alzheimer's disease (AD) or dementia. These studies had mixed results, depending upon whether the diagnosis of AD or dementia was performed by experts and upon the methodology used to classify MF exposure. STUDY DESIGN: Population-based case-control. PLACE AND DURATION OF STUDY: Neurology and Preventive Medicine, Keck School of Medicine, University of Southern California, 2 years. METHODOLOGY: The study population consisted of 3050 Mexican Americans, aged 65+, enrolled in Phase 1 of the Hispanic Established Population for the Epidemiologic Study of the Elderly (H-EPESE) study. Mini-Mental State Exam (MMSE) results, primary occupational history, and other data were collected. Severe cognitive dysfunction was defined as an MMSE score below 10. The MF exposure methodology developed and used in earlier studies was used. RESULTS: Univariate odds ratios (OR) were 3.4 (P< .03; 95% CI: 1.3-8.9) for high and 1.7 (P=.27; 95% CI: 0.7-4.1) for medium or high (M/H) MF occupations. In multivariate main effects models, the results were similar. When interaction terms were allowed in the models, the interactions between M/H or high occupational MF exposure and smoking history or age group were statistically significant, depending upon whether two (65-74, 75+) or three (65-74, 75-84, 85+) age groups were considered, respectively. When the analyses were limited to subjects aged 75+, the interactions between M/H or high MF occupations and a positive smoking history were statistically significant. CONCLUSION: The results of this study indicate that working in an occupation with high or M/H MF exposure may increase the risk of severe cognitive dysfunction. Smoking and older age may increase the deleterious effect of MF exposure.