Development and Evaluation of Rehabilitation Service Areas for the United States.

BACKGROUND: Geographic areas have been developed for many healthcare sectors including acute and primary care. These areas aid in understanding health care supply, use, and outcomes. However, little attention has been given to developing similar geographic tools for understanding rehabilitation in post-acute care. The purpose of this study was to develop and characterize post-acute care Rehabilitation Service Areas (RSAs) in the United States (US) that reflect rehabilitation use by Medicare beneficiaries. METHODS: A patient origin study was conducted to cluster beneficiary ZIP (Zone Improvement Plan) code tabulation areas (ZCTAs) with providers who service those areas using Ward's clustering method. We used US national Medicare claims data for 2013 to 2015 for beneficiaries discharged from an acute care hospital to an inpatient rehabilitation facility (IRF), skilled nursing facility (SNF), long-term care hospital (LTCH), or home health agency (HHA). Medicare is a US health insurance program primarily for older adults. The study population included patient records across all diagnostic groups. We used IRF, SNF, LTCH and HHA services to create the RSAs. We used 2013 and 2014 data (n = 2,730,366) to develop the RSAs and 2015 data (n = 1,118,936) to evaluate stability. We described the RSAs by provider type availability, population, and traveling patterns among beneficiaries. RESULTS: The method resulted in 1,711 discrete RSAs. 38.7% of these RSAs had IRFs, 16.1% had LTCHs, and 99.7% had SNFs. The number of RSAs varied across states; some had fewer than 10 while others had greater than 70. Overall, 21.9% of beneficiaries traveled from the RSA where they resided to another RSA for care. CONCLUSIONS: Rehabilitation Service Areas are a new tool for the measurement and understanding of post-acute care utilization, resources, quality, and outcomes. These areas provide policy makers, researchers, and administrators with small-area boundaries to assess access, supply, demand, and understanding of financing to improve practice and policy for post-acute care in the US.

Understanding Variation in Postacute Care: Developing Rehabilitation Service Areas Through Geographic Mapping.

OBJECTIVE: The aims of the study were to demonstrate a method for developing rehabilitation service areas and to compare service areas based on postacute care rehabilitation admissions to service areas based on acute care hospital admissions. DESIGN: We conducted a secondary analysis of 2013-2014 Medicare records for older patients in Texas (N = 469,172). Our analysis included admission records for inpatient rehabilitation facilities, skilled nursing facilities, long-term care hospitals, and home health agencies. We used Ward's algorithm to cluster patient ZIP Code Tabulation Areas based on which facilities patients were admitted to for rehabilitation. For comparison, we set the number of rehabilitation clusters to 22 to allow for comparison to the 22 hospital referral regions in Texas. Two methods were used to evaluate rehabilitation service areas: intraclass correlation coefficient and variance in the number of rehabilitation beds across areas. RESULTS: Rehabilitation service areas had a higher intraclass correlation coefficient (0.081 vs. 0.076) and variance in beds (27.8 vs. 21.4). Our findings suggest that service areas based on rehabilitation admissions capture has more variation than those based on acute hospital admissions. CONCLUSIONS: This study suggests that the use of rehabilitation service areas would lead to more accurate assessments of rehabilitation geographic variations and their use in understanding rehabilitation outcomes.

Racial Disparities in Type of Heart Failure and Hospitalization.

Heart failure (HF) is one of the leading causes of hospitalization and readmissions. Our study aimed to examine racial disparities in heart failure patients including onset, mortality, length of stay (LOS), direct costs, and readmission rates. This is a secondary data analysis. We analyzed the risk-adjusted inpatient data of all patients admitted with HF to one health academic center. We compared five health outcomes among three racial groups (white, black, and Hispanic). There were 1006 adult patients making 1605 visits from 10/01/2011 to 09/30/2015. Most black patients were admitted in younger age than other racial groups which indicates the needs for more public health preventions. With risk adjustments, the racial differences in LOS and readmission rates remain. We stratified health outcomes by race/ethnic and type of HF. The findings suggest that further studies to uncover underlying causes of these disparities are necessary. Using risk-adjusted hospitalization data allows for comparisons of quality of care across three racial groups. The study suggests that more prevention and protection services are needed for African American patients with heart failure.

The Role of Neighborhood Characteristics in Late Stage Melanoma Diagnosis among Hispanic Men in California, Texas, and Florida, 1996-2012.

BACKGROUND: Hispanics diagnosed with cutaneous melanoma are more likely to present at advanced stages but the reasons for this are unknown. We identify census tracts at high risk for late stage melanoma diagnosis (LSMD) and examine the contextual predictors of LSMD in California, Texas, and Florida. METHODS: We conducted a cross-sectional study using geocoded state cancer registry data. Using hierarchical multilevel logistic regression models we estimated ORs and 95% confidence intervals for the impact of socioeconomic, Hispanic ethnic concentration, index of dissimilarity, and health resource availability measures on LSMD. RESULTS: We identified 12,493 cases. In California, late stage cases were significantly more likely to reside within census tracts composed mostly of Hispanics and immigrants. In Texas, LSMD was associated with residence in areas of socioeconomic deprivation and a higher proportion of immigrants. In Florida, living in areas of low education attainment, high levels of poverty, and a high percentage of Hispanic residents was significantly associated with LSMD. Residential segregation did not independently affect LSMD. CONCLUSION: The influence of contextual predictors on LSMD varied in magnitude and strength by state, highlighting both the cosegregation of social adversity and poverty and the complexity of their interactions.

Variation in Functional Status After Hip Fracture: Facility and Regional Influence on Mobility and Self-Care.

BACKGROUND: Recent reports show substantial geographic variation in postacute health care spending. Little is known about variation in functional outcomes after postacute rehabilitation for patients with hip fracture. We examined variation in mobility and self-care after hip fracture rehabilitation across inpatient rehabilitation facilities (IRFs), hospital referral regions (HRRs) and states. METHODS: Retrospective cohort study using data from the Centers for Medicare and Medicaid Services (CMS) from 2006 to 2009. Study sample included 149,258 records from patients 66 years and older at 1,166 IRFs located within 292 HRRs and across 50 states. Hip fracture cases were defined by CMS impairment group codes (08.11, 08.12). Hierarchical generalized linear models were used to assess discharge mobility and self-care functional status, adjusting for individual patient characteristics and the random effect of IRFs, HRRs, and states. RESULTS: Variation in discharge mobility status as assessed by the intraclass correlation percentage (ICC%) was 8.8% across IRFs, 4.0% across HRRs, and 1.8% across states. For self-care, the ICCs were 10.2% across IRFs, 4.8% across HRRs, and 2.4% across states. The range of discharge mobility scores (maximum functional status rating to minimum functional status rating) showed a 9.6-point difference for IRFs, 6.5 for regions, and 2.6 for states. Range of discharge self-care scores were 13.1 for IRFs, 6.8 for HRRs, and 3.4 for states. CONCLUSION: Variation in functional status following postacute hip fracture rehabilitation appears to occur primarily at the level of facilities rather than geographic location.

Improving the Collection of Race, Ethnicity, and Language Data to Reduce Healthcare Disparities: A Case Study from an Academic Medical Center.

Well-designed electronic health records (EHRs) must integrate a variety of accurate information to support efforts to improve quality of care, particularly equity-in-care initiatives. This case study provides insight into the challenges those initiatives may face in collecting accurate race, ethnicity, and language (REAL) information in the EHR. We present the experience of an academic medical center strengthening its EHR for better collection of REAL data with funding from the EHR Incentive Programs for meaningful use of health information technology and the Texas Medicaid 1115 Waiver program. We also present a plan to address some of the challenges that arose during the course of the project. Our experience at an academic medical center can provide guidance about the likely challenges similar institutions may expect when they implement new initiatives to collect REAL data, particularly challenges regarding scope, personnel, and other resource needs.

Melanoma Disparities among US Hispanics: Use of the Social Ecological Model to Contextualize Reasons for Inequitable Outcomes and Frame a Research Agenda.

Cutaneous melanoma is a significant public health concern, accounting for thousands of deaths annually in the US. Early detection and diagnosis are critical given the poor prognosis and limited treatment options of advanced-stage disease. While non-Hispanic whites have higher incidence rates of melanoma, Hispanics are typically diagnosed at later disease stages and suffer higher morbidity and mortality. Currently, there is a paucity of literature investigating the root causes underlying these trends among Hispanics. Given that Hispanics are the most rapidly expanding demographic segment in the US, it is essential for cancer control efforts to elucidate the major determinants of their poor melanoma outcomes. Herein, we use the social ecological model as a framework to explore the multitude of influences on melanoma disparities among Hispanics and provide recommendations for planning future studies and interventions.

Geographic and facility variation in inpatient stroke rehabilitation: multilevel analysis of functional status.

OBJECTIVE: To examine geographic and facility variation in cognitive and motor functional outcomes after postacute inpatient rehabilitation in patients with stroke. DESIGN: Retrospective cohort design using Centers for Medicare and Medicaid Services (CMS) claims files. Records from 1209 rehabilitation facilities in 298 hospital referral regions (HRRs) were examined. Patient records were analyzed using linear mixed models. Multilevel models were used to calculate the variation in outcomes attributable to facilities and geographic regions. SETTING: Inpatient rehabilitation units and facilities. PARTICIPANTS: Patients (N=145,460) with stroke discharged from inpatient rehabilitation from 2006 through 2009. INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Cognitive and motor functional status at discharge measured by items in the CMS Inpatient Rehabilitation Facility-Patient Assessment Instrument. RESULTS: Variation profiles indicated that 19.1% of rehabilitation facilities were significantly below the mean functional status rating (mean ± SD, 81.58±22.30), with 221 facilities (18.3%) above the mean. Total discharge functional status ratings varied by 3.57 points across regions. Across facilities, functional status values varied by 29.2 points, with a 9.1-point difference between the top and bottom deciles. Variation in discharge motor function attributable to HRR was reduced by 82% after controlling for cluster effects at the facility level. CONCLUSIONS: Our findings suggest that variation in motor and cognitive function at discharge after postacute rehabilitation in patients with stroke is accounted for more by facility than geographic location.

Neighborhood Ethnic Composition and Problem Drinking Among Older Mexican American Men: Results from the Hispanic Established Populations for the Epidemiologic Study of the Elderly.

Ethnic enclaves may be protective for health. This study investigates the effects of neighborhood co-ethnic density on problem drinking among older Mexican American men. Probability sample of 2,086 community-dwelling Mexican Americans aged 75 or older drawn in 2004-2005 residing in communities in Arizona, California, Colorado, New Mexico and Texas. Problem drinking was found among 15.3 % of men (n = 350). For each percent increase in neighborhood percent Mexican American, men had 2 % lower odds of problem drinking [odds ratio (OR) 0.98; P < 0.05]. U.S. born men had lower odds of problem drinking (OR 0.40; P < 0.05) compared with foreign born men, while English language use was associated with greater odds of problem drinking (OR 2.14; P < 0.05). Older Mexican American men in neighborhoods with low levels of co-ethnic density, the foreign born, and those with English language facility had an increased likelihood of problem drinking.

Geographic disparities in mammography capacity in the South: a longitudinal assessment of supply and demand.

OBJECTIVE: Studies have shown that there is sufficient availability of mammography; however, little is known about geographic variation in capacity. The purpose of this study was to determine the locations and extent of over/undersupply of mammography in 14 southern states from 2002 to 2008. DATA SOURCES: Mammography facility data were collected from the U.S. Food and Drug Administration (FDA). Population estimates, used to estimate the potential demand for mammography, were obtained from GeoLytics Inc. STUDY DESIGN: Using the two-step floating catchment area method, we calculated spatial accessibility at the block group level and categorized the resulting index to represent the extent of under/oversupply relative to the potential demand. PRINCIPAL FINDINGS: Results show decreasing availability of mammography over time. The extent of over/undersupply varied significantly across the South. Reductions in capacity occurred primarily in areas with an oversupply of machines, resulting in a 68 percent decrease in the percent of women living in excess capacity areas from 2002 to 2008. The percent of women living in poor capacity areas rose by 10 percent from 2002 to 2008. CONCLUSIONS: Our study found decreasing mammography availability and capacity over time, with substantial variation across states. This information can assist providers and policy makers in their business planning and resource allocation decisions.

Regional variation in stroke rehabilitation outcomes.

OBJECTIVE: To examine and describe regional variation in outcomes for persons with stroke receiving inpatient medical rehabilitation. DESIGN: Retrospective cohort design. SETTING: Inpatient rehabilitation units and facilities contributing to the Uniform Data System for Medical Rehabilitation from the United States. PARTICIPANTS: Patients (N=143,036) with stroke discharged from inpatient rehabilitation during 2006 and 2007. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Community discharge, length of stay (LOS), and discharge functional status ratings (motor, cognitive) across 10 geographic service regions defined by the Centers for Medicare and Medicaid Services (CMS). RESULTS: Approximately 71% of the sample was discharged to the community. After adjusting for covariates, the percentage discharged to the community varied from 79.1% in the Southwest (CMS region 9) to 59.4% in the Northeast (CMS region 2). Adjusted LOS varied by 2.1 days, with CMS region 1 having the longest LOS at 18.3 days and CMS regions 5 and 9 having the shortest at 16.2 days. CONCLUSIONS: Rehabilitation outcomes for persons with stroke varied across CMS regions. Substantial variation in discharge destination and LOS remained after adjusting for demographic and clinical characteristics.

Neighborhood Hispanic composition and depressive symptoms among Mexican-descent residents of Texas City, Texas.

Substantial research shows that increased Hispanic neighborhood concentration is associated with several beneficial health outcomes including lower adult mortality, better self-rated health, and fewer respiratory problems. Literature on the relationship of Hispanic composition and depressive symptoms is more equivocal. In addition, few studies have directly investigated hypothesized mechanisms of this relationship. This study uses data from a probability sample of 1238 Mexican-descent adults living in 48 neighborhoods in Texas City, Texas. Multilevel regression models investigate whether Hispanic neighborhood composition is associated with fewer depressive symptoms. This study also investigates whether social support, perceived discrimination, and perceived stress mediate or moderate the relationship, and whether results differ by primary language used at home. We find that individuals living in high Hispanic composition neighborhoods experience fewer depressive symptoms than individuals in low Hispanic composition neighborhoods. In addition, we find that these beneficial effects only apply to respondents who speak English. Social support, perceived discrimination, and perceived stress mediate the Hispanic composition-depressive symptoms relationship. In addition, discrimination and stress moderate the relationship between Hispanic composition and depressive symptoms. Our findings support theories linking higher neighborhood Hispanic composition and better mental health, and suggest that Spanish language use, social support, discrimination and stress may play important roles in the Hispanic composition-depressive symptoms relationship.

Physical performance and short-term mortality in very old Mexican Americans.

UNLABELLED: BACKGROUND/STUDY CONTEXT: Physical performance measures have been found to be strong predictors of adverse outcomes in aging populations. Few studies have examined the predictive ability of physical performance measures exclusively within populations of the very old. This study explores the predictive ability of the Short Physical Performance Battery (SPPB) and its three subcomponents-a timed walk, balance test, and repeated timed chair stands-on mortality in a sample of Mexican Americans aged 75 and older. METHODS: Logistic regression analyses were used with data from the Hispanic Established Population for the Epidemiological Study of the Elderly (Hispanic EPESE), to investigate the relationship between timed walk, balance test, repeated timed chair stands, and the SPPB and mortality over a 2½-year period. RESULTS: The authors find that being unable to complete the timed walk, the balance test, and repeated timed chair stands, or unable to complete any of the SPPB was significantly associated with mortality over 2½ years. CONCLUSION: These findings indicate that physical performance measures may be less predictive of short-term mortality in very old Mexican Americans than previously thought. More research is needed to understand this relationship.

Health insurance coverage in the Houston-Galveston area under the patient protection and affordable care act.

This study projects the number of nonelderly people who could gain coverage under the Patient Protection and Affordable Care Act (PPACA) for the period from 2014 through 2020 in the 13-county Houston-Galveston area region. The major PPACA provisions aimed at expanding coverage as well as the populations targeted by those provisions are described. Projections of the impact of PPACA on coverage in the area are based on estimates of growth in the size of targeted populations in each county and the anticipated responses of those populations to the major provisions of PPACA. The projections indicate that, if fully implemented, PPACA could cut the uninsurance rate in the region by half, from 26% in 2010 to 13% in 2020. This change translates into health insurance coverage for approximately 2 million additional people, from the current 4.2 million to a projected 5.9 million. The number of Medicaid enrollees could increase by an estimated 600,000 (a 79% increase), although private insurance coverage, which could increase by as much as 1 million enrollees (a 30% increase), will remain the primary source of coverage for most people. Coverage gains from PPACA will vary considerably by county, depending on the age-income-citizenship characteristics of the population, current uninsurance rates, and the rate of population growth.

Population trends and late-life disability in Hispanics from the Midwest.

OBJECTIVES: To describe the growth of the Hispanic population in the Midwest states of the United States, to present disability levels in older Mexican and non-Mexican-origin Midwest Hispanics by place of birth and poverty status, and compare disability levels among older Midwest Hispanics with those among Southwest Hispanics as well as non-Hispanics Whites and African Americans in each region. METHOD: Population data come from decennial U.S. Census Bureau surveys. Disability data for adults ≥ 50 years old come from the 2008 American Community Survey. RESULTS: The Hispanic population in the Midwest has tripled since 1980 and now constitutes 6.6% of the entire Midwest population. Older Midwest Hispanics are somewhat younger, have a higher male-female ratio, and are more likely to be born outside the continental United States than Southwest Hispanics. In the Midwest, foreign-born Mexican American men report the lowest disability levels. Foreign-born Hispanic women of non-Mexican origin report the highest disability levels. Overall, older Hispanics have intermediate disability levels relative to non-Hispanic Whites and African Americans. Midwest Hispanics report less disability than Southwest Hispanics. DISCUSSION: There is substantial heterogeneity in late-life disability among Midwest Hispanics, which may be related to place of birth and of origin. Future research is needed to examine age at immigration and health selection as potential reasons for low disability levels among foreign-born Mexican American men.

The socio-spatial neighborhood estimation method: an approach to operationalizing the neighborhood concept.

The literature on neighborhoods and health highlights the difficulty of operationalizing "neighborhood" in a conceptually and empirically valid manner. Most studies, however, continue to define neighborhoods using less theoretically relevant boundaries, risking erroneous inferences from poor measurement. We review an innovative methodology to address this problem, called the socio-spatial neighborhood estimation method (SNEM). To estimate neighborhood boundaries, researchers used a theoretically informed combination of qualitative GIS and on-the-ground observations in Texas City, Texas. Using data from a large sample, we assessed the SNEM-generated neighborhood units by comparing intra-class correlation coefficients (ICCs) and multi-level model parameter estimates of SNEM-based measures against those for census block groups and regular grid cells. ICCs and criterion-related validity evidence using SF-36 outcome measures indicate that the SNEM approach to operationalization could improve inferences based on neighborhoods and health research.

Protective neighborhoods: neighborhood proportion of Mexican Americans and depressive symptoms in very old Mexican Americans.

Research indicates that neighborhood context can have a significant effect on the health of older adults. The evidence suggests that there may be physical health benefits afforded to Mexican Americans living in ethnically homogenous neighborhoods, despite the relatively high economic risk in such neighborhoods, but few studies have considered the effect of neighborhood ethnic density on mental health outcomes in older adults. This study evaluated the association between neighborhoods with a high proportion of Mexican Americans and depressive symptoms in very old Mexican Americans. Hierarchical linear modeling was used to examine data from Wave 5 (2004/05) of the Hispanic Established Populations for the Epidemiologic Study of the Elderly. Subjects included 1,875 community-dwelling Mexican Americans aged 75 and older living in 386 neighborhoods in five states in the southwestern United States (Arizona, California, Colorado, New Mexico, Texas). Depressive symptoms were measured using the Center for Epidemiologic Studies Depression Scale (α=0.88). Results showed that, in very old men, there was a significant negative association between percentage of Mexican Americans in the neighborhood and depressive symptoms (P=.01). In women, the direction of the association was the same, but the effect was not significant. These findings suggest that the proportion of Mexican Americans in the neighborhood matter more for very old Mexican American men than women. Further research may inform screening and treatment for depressive symptoms based on differences in neighborhood composition. Recommendations include culturally customized programs that offer older Mexican Americans greater mobility and access to programs and opportunities in culturally identifiable neighborhoods.

Lower stroke mortality among Hispanics: an exploration of potential methodological confounders.

OBJECTIVES: Stroke mortality rates are reported to be lower for Hispanics than non-Hispanic Whites. We investigate the degree to which this lower reported mortality is explained by inaccuracies introduced through omission of nativity, imprecise measurement of cause of death, and under-ascertainment of Hispanic ethnicity on death certificates. We used national vital registration data for the years 1989-1991 and 1999-2002, including foreign- and US-born Hispanics and non-Hispanic Whites. Hispanic deaths were adjusted for misclassification of ethnicity on the death certificate. Denominators for the rates were derived from census estimates. RESULTS: Adjustment for nativity and death certificate misclassification removes the stroke mortality advantage for US-born Hispanic men, but not women. After adjustment, US-born Hispanic men and women have higher rates of mortality from subarachnoid hemorrhage than non-Hispanic Whites (RR: 1.23 and 1.23, respectively), but lower rates of mortality from Ischemic (RR: 0.76 and 0.73, respectively) and chronic effects of stroke (RR: 0.87 and 0.73, respectively). CONCLUSIONS: When adjusted for misclassification the lower stroke mortality remains for Hispanic men and women at older ages. Part of the previously reported advantage is a combination of imprecise measurement and data quality.

Trends in health care spending for immigrants in the United States.

The suspected burden that undocumented immigrants may place on the U.S. health care system has been a flashpoint in health care and immigration reform debates. An examination of health care spending during 1999-2006 for adult naturalized citizens and immigrant noncitizens (which includes some undocumented immigrants) finds that the cost of providing health care to immigrants is lower than that of providing care to U.S. natives and that immigrants are not contributing disproportionately to high health care costs in public programs such as Medicaid. However, noncitizen immigrants were found to be more likely than U.S. natives to have a health care visit classified as uncompensated care.

The Hispanic mortality advantage and ethnic misclassification on US death certificates.

OBJECTIVES: We tested the data artifact hypothesis regarding the Hispanic mortality advantage by investigating whether and to what degree this advantage is explained by Hispanic origin misclassification on US death certificates. METHODS: We used the National Longitudinal Mortality Study, which links Current Population Survey records to death certificates for 1979 through 1998, to estimate the sensitivity, specificity, and net ascertainment of Hispanic ethnicity on death certificates compared with survey classifications. Using national vital statistics mortality data, we estimated Hispanic age-specific and age-adjusted death rates, which were uncorrected and corrected for death certificate misclassification, and produced death rate ratios comparing the Hispanic with the non-Hispanic White population. RESULTS: Hispanic origin reporting on death certificates in the United States is reasonably good. The net ascertainment of Hispanic origin is just 5% higher on survey records than on death certificates. Corrected age-adjusted death rates for Hispanics are lower than those for the non-Hispanic White population by close to 20%. CONCLUSIONS: The Hispanic mortality paradox is not explained by an incongruence between ethnic classification in vital registration and population data systems.