Geographic Disparities in Patient Travel for Dialysis in the United States

Elevated Ambient Temperature Associated With Increased Cardiovascular Disease-Risk Among Patients on Hemodialysis

Introduction

In many parts of the world, ambient temperatures have increased due to climate change. Due to loss of renal function, which impacts the regulation of thermoregulatory mechanisms, the ability to adapt and to be resilient to changing conditions is particularly concerning among individuals with kidney failure. The aim of this study was to assess the effect of heat on mortality and health care utilization among US patients on hemodialysis.

Methods

We conducted a retrospective analysis from 2011 to 2016 in the contiguous United States during warmer months among eligible patients on dialysis who were identified in the United States Renal Data System (USRDS). Daily ambient temperature was estimated on a 1 km grid and assigned to ZIP-code. Case-crossover design with conditional Poisson models were used to assess the risk of developing adverse health outcomes associated with temperature exposure.

Results

Overall, exposure to high temperature is associated with elevated risk for both mortality and health care utilization among hemodialysis patients. The risk ratios for all-cause mortality and daily temperature were 1.07 (95% confidence interval [CI]: 1.03-1.11), 1.17 (1.14-1.21) for fluid disorder-related hospital admissions, and 1.19 (1.16-1.22) for cardiovascular event-related emergency department (ED) visits, comparing 99th percentile versus 50th percentile daily temperatures. Larger effects were observed for cumulative lagged exposure 3 days prior to the outcome and for Southwest and Northwest climate regions.

Conclusion

Heat exposure is associated with elevated risk for cardiovascular disease (CVD)-related mortality and health care utilization among this vulnerable population. Furthermore, the effect appears to be potentially cumulative in the short-term and varies geographically.

Waitlist Time, Age, and Social Vulnerability: Impact on the Survival Benefit of Deceased Donor Kidney Transplantation Versus Long-term Dialysis Among Patients With End-stage Renal Disease

BACKGROUND

We sought to define the survival benefit of kidney transplantation versus long-term dialysis relative to waitlist time on dialysis, social vulnerability, and age among end-stage renal transplant candidates.

METHODS

End-stage renal disease patients who were candidates for their first deceased donor kidney transplantation between 2008 and 2020 were identified using the US Renal Data System. Survival probabilities for patient survival were compared using the restricted mean survival times (RMSTs) across different age and social vulnerability index (SVI) ranges.

RESULTS

Among 149 923 patients, 68 795 (45.9%) patients underwent a kidney transplant and 81 128 (54.1%) remained on dialysis. After propensity-score matching (n = 58 035 in each cohort), the 5-y RMST difference between kidney transplant and dialysis demonstrated an increasing trend in mean life-years gained within 5 y of follow-up relative to advancing age (<30 y: 0.40 y, 95% confidence interval, 0.36-0.44 y versus >70 y: 0.75 y, 95% confidence interval, 0.70-0.80 y). Conversely, disparities in 5-y RMSTs remained consistent relative to social vulnerability (median 5-y RMST difference: 0.62 y comparing low versus high SVI). When considering waitlist duration, stratified analyses demonstrated increasing trends across different age groups with the largest RMST differences observed among older patients aged ≥70 y. Notably, longer waitlist durations (>3 y) yielded more pronounced RMST differences compared with shorter durations (<1 y).

CONCLUSIONS

These data underscore the survival benefit associated with kidney transplantation over long-term dialysis across various age and SVI ranges. Transplantation demonstrated a greater advantage among older patients who had a longer waitlist duration.

The Effects of Distance, Time, and Nonspatial Factors on Hemodialysis Access in Qatar

Background A long distance and time spent traveling to a hemodialysis (HD) center and other factors, such as comorbidities, can significantly impact HD patient compliance, satisfaction, and cost. Uncertainty about HD-dependent patients' geographical location may lead to inappropriate distribution of HD centers. The present study investigates travel time, distance, and nonspatial factors affecting HD center accessibility within a 30-km radius in the State of Qatar. Materials and methods The study included all HD-dependent patients residing in Qatar between March 1, 2020, and December 31, 2021. There were 921 patients dialyzed in six HD centers across Qatar. Our methodology incorporated descriptive and analytical cross-sectional designs to accurately identify the shortest routes and quickest travel times. We used two applications (Maptive {Vancouver, WA: BatchGeo LLC} and Google Maps {Mountain View, CA: Google LLC}) and marked a driving distance of 30 km as the main assessment scale and measurement standard, allowing optimum spatial accessibility determination. Results On average, patients traveled approximately 19±4.2 km, requiring almost 17.6±3.4 minutes to reach the assigned HD center three times per week. Based on geographic-spatial accessibility analysis, patients living in Umm Salal drove 31.4±3.5 km in 32.4±4.7 minutes, Al Daayen patients drove 30.2 km in 25.3 minutes, and others even drove more than 70 km to access HD sessions. Approximately 37.8% of Qatar's municipalities had no HD centers within their boundaries, but nearly 47% of HD-dependent patients lived in those municipalities. Additionally, some municipalities had HD centers; however, their general population density was less than 100 inhabitants/km2, and they had relatively few patients requiring regular HD. We noted a statistically significant correlation between the patients' residences and the locations of HD centers, whether they were located within or outside municipalities. Also, nonspatial factors may have affected the likelihood of reaching a hemodialysis center within a 30-km distance, including two or more comorbid conditions, having HD for at least five years, living in a municipality with more than 1,000 inhabitants/km2, being female, and attending dialysis centers that are more than 30 km away. Conclusion Although the available HD centers were sufficient for the present number of patients requiring HD, HD center locations did not match the patients' distribution, leading to difficulties for some patients. Understanding the impact of this geographic mismatch, population density, and other spatial factors helps significantly improve patient care and satisfaction at minimal cost. Furthermore, considering all these factors is crucial when planning new centers to achieve higher satisfaction and compliance as well as better health care.

Availability and Quality of Dialysis Care in Rural versus Urban US Counties

INTRODUCTION

Rural areas face significant disparities in dialysis care compared to urban areas due to limited access to dialysis facilities, longer travel distances, and a shortage of healthcare professionals. The objective of this study was to conduct a national examination of rural-urban differences in quality of dialysis care offered across counties in the USA.

METHODS

Data were gathered from Medicare-certified dialysis facilities in 2020 from the Centers for Medicare and Medicaid Services website. To identify high-need counties, county-level estimated crude prevalence of diabetes in adults was obtained from the 2022 CDC PLACES data portal. Our analysis reviewed 3,141 counties in the USA. The primary outcome measured was whether the county had a dialysis facility. Among those counties that had a dialysis facility, additional outcomes were the average star rating, whether peritoneal dialysis was offered, and whether home dialysis was offered.

RESULTS

The type of services offered by dialysis facilities varied significantly, with peritoneal dialysis being the most commonly offered service (50.8%), followed by home hemodialysis (28.5%) and late-shift services (16.0%). These service availabilities are more prevalent in urban facilities than in rural facilities. The Centers for Medicare and Medicaid Services Five Star Quality ratings were quite different between urban and rural facilities, with 40.4% of rural facilities having a ranking of five, compared to 27.1% in urban.

CONCLUSION

The majority of rural counties lack a single dialysis facility. Counties with high rates of chronic kidney disease, diabetes, and blood pressure, deemed high need, were less likely to have a highly rated dialysis facility. The findings can be used to further inform targeted efforts to increase diabetes educational programming and design appropriate interventions to those residing in rural communities and high-need counties who may need it the most.

Financial toxicity experienced by rural Australian families with chronic kidney disease

AIM

Chronic kidney disease (CKD) and its treatment places a financial burden on healthcare systems and households worldwide, yet little is known of its financial impact, on those who reside in rural settings. We aimed to quantify the financial impacts and out-of-pocket expenditure experienced by adult rural patients with CKD in Australia.

METHODS

A web based structured survey was completed between November 2020 and January 2021. English speaking participants over 18 years of age, diagnosed with CKD stages 3-5, those receiving dialysis or with a kidney transplant, who lived in a rural location in Australia.

RESULTS

In total 77 (69% completion rate) participated. The mean out of pocket expenses were 5056 AUD annually (excluding private health insurance costs), 78% of households experienced financial hardship with 54% classified as experiencing financial catastrophe (out-of-pocket expenditure greater than 10% of household income). Mean distances to access health services for all rural and remote classifications was greater than 50 kilometres for specialist nephrology services and greater than 300 kilometres for transplanting centres. Relocation for a period greater than 3 months to access care was experienced by 24% of participants.

CONCLUSION

Rural households experience considerable financial hardship due to out-of-pocket costs in accessing treatment for CKD and other health-related care, raising concerns about equity in Australia, a high-income country with universal healthcare.

County-Level Dialysis Facility Supply and Distance Traveled to Facilities among Incident Kidney Failure Patients

Background

The availability of dialysis facilities and distance traveled to receive care can impact health outcomes for patients with newly onset kidney failure. We examined recent changes in county-level number of dialysis facilities between 2012 and 2019 and assessed the association between county-level dialysis facility supply and the distance incident kidney failure patients travel to receive care.

Methods

We conducted a cross-sectional study of 828,427 adult patients initiating in-center hemodialysis for incident kidney failure between January 1, 2012, and December 31, 2019. We calculated the annual county-level number of dialysis facilities, and counties were categorized as having zero, one, two, or three or more dialysis facilities at the time of treatment initiation. We then measured the distance traveled between a patient's home address and dialysis facility at treatment initiation (in miles) and evaluated the association between county-level number of dialysis facilities and distance traveled to initiate treatment.

Results

The average annual county-level number of facilities increased from 1.8 to 2.3 between 2012 and 2019. In our study period, 5% of incident adult kidney failure patients resided in a county that had zero dialysis facilities between 2012 and 2019. Compared with counties with three or more dialysis facilities, patients living in counties with no facilities in our study period traveled 14.3 miles (95% CI, 13.4 to 15.2) further for treatment.

Conclusions

Kidney failure patients in counties that had no dialysis facilities traveled further, limiting their access to dialysis. Counties with no dialysis facilities at the end of the study period were more rural and had higher poverty than other counties.

Assessment of Community-Level Vulnerability and Access to Medications for Opioid Use Disorder

IMPORTANCE

Given that COVID-19 and recent natural disasters exacerbated the shortage of medication for opioid use disorder (MOUD) services and were associated with increased opioid overdose mortality, it is important to examine how a community's ability to respond to natural disasters and infectious disease outbreaks is associated with MOUD access.

OBJECTIVE

To examine the association of community vulnerability to disasters and pandemics with geographic access to each of the 3 MOUDs and whether this association differs by urban, suburban, or rural classification.

DESIGN, SETTING, AND PARTICIPANTS

This cross-sectional study of zip code tabulation areas (ZCTAs) in the continental United States excluding Washington, DC, conducted a geospatial analysis of 2020 treatment location data.

EXPOSURES

Social vulnerability index (US Centers for Disease Control and Prevention measure of vulnerability to disasters or pandemics).

MAIN OUTCOMES AND MEASURES

Drive time in minutes from the population-weighted center of the ZCTA to the ZCTA of the nearest treatment location for each treatment type (buprenorphine, methadone, and extended-release naltrexone).

RESULTS

Among 32 604 ZCTAs within the continental US, 170 within Washington, DC, and 20 without an urban-rural classification were excluded, resulting in a final sample of 32 434 ZCTAs. Greater social vulnerability was correlated with longer drive times for methadone (correlation, 0.10; 95% CI, 0.09 to 0.11), but it was not correlated with access to other MOUDs. Among rural ZCTAs, increasing social vulnerability was correlated with shorter drive times to buprenorphine (correlation, -0.10; 95% CI, -0.12 to -0.08) but vulnerability was not correlated with other measures of access. Among suburban ZCTAs, greater vulnerability was correlated with both longer drive times to methadone (correlation, 0.22; 95% CI, 0.20 to 0.24) and extended-release naltrexone (correlation, 0.15; 95% CI, 0.13 to 0.17).

CONCLUSIONS AND RELEVANCE

In this study, communities with greater vulnerability did not have greater geographic access to MOUD, and the mismatch between vulnerability and medication access was greatest in suburban communities. Rural communities had poor geographic access regardless of vulnerability status. Future disaster preparedness planning should match the location of services to communities with greater vulnerability to prevent inequities in overdose deaths.

Effects of short-term ambient PM2.5 exposure on cardiovascular disease incidence and mortality among U.S. hemodialysis patients: a retrospective cohort study

BACKGROUND

Ambient PM_2.5 is a ubiquitous air pollutant with demonstrated adverse health impacts in population. Hemodialysis patients are a highly vulnerable population and may be particularly susceptible to the effects of PM_2.5 exposure. This study examines associations between short-term PM_2.5 exposure and cardiovascular disease (CVD) and mortality among patients receiving maintenance in-center hemodialysis.

METHODS

Using the United State Renal Data System (USRDS) registry, we enumerated a cohort of all US adult kidney failure patients who initiated in-center hemodialysis between 1/1/2011 and 12/31/2016. Daily ambient PM_2.5 exposure estimates were assigned to cohort members based on the ZIP code of the dialysis clinic. CVD incidence and mortality were ascertained through 2016 based on USRDS records. Discrete time hazards regression was used to estimate the association between lagged PM_2.5 exposure and CVD incidence, CVD-specific mortality, and all-cause mortality 1 t adjusting for temperature, humidity, day of the week, season, age at baseline, race, employment status, and geographic region. Effect measure modification was assessed for age, sex, race, and comorbidities.

RESULTS

Among 314,079 hemodialysis patients, a 10 µg/m³ increase in the average lag 0-1 daily PM_2.5 exposure was associated with CVD incidence (HR: 1.03 (95% CI: 1.02, 1.04)), CVD mortality (1.05 (95% CI: 1.03, 1.08)), and all-cause mortality (1.04 (95% CI: 1.03, 1.06)). The association was larger for people who initiated dialysis at an older age, while minimal evidence of effect modification was observed across levels of sex, race, or baseline comorbidities.

CONCLUSIONS

Short-term ambient PM_2.5 exposure was positively associated with incident CVD events and mortality among patients receiving in-center hemodialysis. Older patients appeared to be more susceptible to PM_2.5-associated CVD events than younger hemodialysis patients.

Understanding the Tradeoffs Between Travel Burden and Quality of Care for In-center Hemodialysis Patients

BACKGROUND

Renal dialysis is a lifesaving but demanding therapy, requiring 3 weekly treatments of multiple-hour durations. Though travel times and quality of care vary across facilities, the extent to which patients are willing and able to engage in weighing tradeoffs is not known. Since 2015, Medicare has summarized and reported quality data for dialysis facilities using a star rating system. We estimate choice models to assess the relative roles of travel distance and quality of care in explaining patient choice of facility.

RESEARCH DESIGN

Using national data on 2 million patient-years from 7198 dialysis facilities and 4-star rating releases, we estimated travel distance to patients' closest facilities, incremental travel distance to the next closest facility with a higher star rating, and the difference in ratings between these 2 facilities. We fit mixed effects logistic regression models predicting whether patients dialyzed at their closest facilities.

RESULTS

Median travel distance was 4 times that in rural (10.9 miles) versus urban areas (2.6 miles). Higher differences in rating [odds ratios (OR): 0.56; 95% confidence interval (CI): 0.50-0.62] and greater area deprivation (OR: 0.50; 95% CI: 0.48-0.53) were associated with lower odds of attending one's closest facility. Stratified models were also fit based on urbanicity. For rural patients, excess travel was associated with higher odds of attending the closer facility (per 10 miles; OR: 1.05; 95% CI: 1.04-1.06). Star rating differences were associated with lower odds of receiving care from the closest facility among urban (OR: 0.57; 95% CI: 0.51-0.63) and rural patients (OR: 0.18; 95% CI: 0.08-0.44).

CONCLUSIONS

Most dialysis patients have higher rated facilities located not much further than their closest facility, suggesting many patients could evaluate tradeoffs between distance and quality of care in where they receive dialysis. Our results show that such tradeoffs likely occur. Therefore, quality ratings such as the Dialysis Facility Compare (DFC) Star Rating may provide actionable information to patients and caregivers. However, we were not able to assess whether these associations reflect a causal effect of the Star Ratings on patient choice, as the Star Ratings served only as a marker of quality of care.

Clinicians' perspectives on equity of access to dialysis and kidney transplantation for rural people in Australia: a semistructured interview study

OBJECTIVES

People with chronic kidney disease requiring dialysis or kidney transplantation in rural areas have worse outcomes, including an increased risk of hospitalisation and mortality and encounter many barriers to accessing kidney replacement therapy. We aim to describe clinicians' perspectives of equity of access to dialysis and kidney transplantation in rural areas.

DESIGN

Qualitative study with semistructured interviews.

SETTING AND PARTICIPANTS

Twenty eight nephrologists, nurses and social workers from 19 centres across seven states in Australia.

RESULTS

We identified five themes: the tyranny of distance (with subthemes of overwhelming burden of travel, minimising relocation distress, limited transportation options and concerns for patient safety on the roads); supporting navigation of health systems (reliance on local champions, variability of health literacy, providing flexible models of care and frustrated by gatekeepers); disrupted care (without continuity of care, scarcity of specialist services and fluctuating capacity for dialysis); pervasive financial distress (crippling out of pocket expenditure and widespread socioeconomic disadvantage) and understanding local variability (lacking availability of safe and sustainable resources for dialysis, sensitivity to local needs and dependence on social support).

CONCLUSIONS

Clinicians identified geographical barriers, dislocation from homes and financial hardship to be major challenges for patients in accessing kidney replacement therapy. Strategies such as telehealth, outreach services, increased service provision and patient navigators were suggested to improve access.

Initial Home Dialysis Is Increased for Rural Patients by Accessing Urban Facilities

Background

The 240,000 rural patients with end stage kidney disease in the United States have less access to nephrology care and higher mortality than those in urban settings. The Advancing American Kidney Health initiative aims to increase the use of home renal replacement therapy. Little is known about how rural patients access home dialysis and the availability and quality of rural dialysis facilities.

Methods

Incident dialysis patients in 2017 and their facilities were identified in the United States Renal Data System. Facility quality and service availability were analyzed with descriptive statistics. We assessed the availability of home dialysis methods, depending on rural versus urban counties, and then we used multivariate logistic regression to identify the likelihood of rural patients with home dialysis as their initial modality and the likelihood of rural patients changing to home dialysis within 90 days. Finally, we assessed mortality after dialysis initiation on the basis of patient home location.

Results

Of the 97,930 dialysis initiates, 15,310 (16%) were rural. Rural dialysis facilities were less likely to offer home dialysis (51% versus 54%, P<0.001). Although a greater proportion of rural patients (9% versus 8%, P<0.001) were on home dialysis, this was achieved by traveling to urban facilities to obtain home dialysis (OR=2.74, P<0.001). After adjusting for patient and facility factors, rural patients had a higher risk of mortality (HR=1.06, P=0.004).

Conclusions

Despite having fewer facilities that offer home dialysis, rural patients were more often on home dialysis methods because they traveled to urban facilities, representing an access gap. Even if rural patients accessed home dialysis at urban facilities, rural patients still suffered worse mortality. Future dialysis policy should address this access gap to improve care and overall mortality for rural patients.

Equivalence of care? Accessibility and availability of dialysis services for older prisoners in Switzerland

PURPOSE

According to the principle of equivalence of care, health care in prison has to be of the same standard and quality as in the general population. This study aims to determine the geographic accessibility of dialysis services for older prisoners and the older general population in Switzerland and whether accessibility and availability of dialysis care are equivalent.

DESIGN/METHODOLOGY/APPROACH

Spatial accessibility analysis incorporated four different data types: population data, administrative data, street network data and addresses of prisons and hemodialysis services.

FINDINGS

Analysis revealed that the average travel time to the nearest dialysis service was better for prisoners (11.5 min) than for the general population (14.8 min). However, dialysis service for prisoners is hampered by the necessary lead-time in correctional settings, which, ultimately, leads to longer overall access times (36.5 min). Accordingly, the equivalence of dialysis care for older Swiss prisoners is not entirely respected for availability and accessibility.

ORIGINALITY/VALUE

The strength of the study lies in the combination of ethical principles and the highly tangible results of a spatial accessibility analysis. The ethics-driven empirical analysis provides arguments for policy-makers to review the current practices.

Organizational Characteristics Associated with High Performance in Medicare's Comprehensive End-Stage Renal Disease Care Initiative

BACKGROUND AND OBJECTIVES

Medicare plans to extend financial structures tested through the Comprehensive End-Stage Renal Disease Care (CEC) Initiative-an alternative payment model for maintenance dialysis providers-to promote high-value care for beneficiaries with kidney failure. The End-Stage Renal Disease Seamless Care Organizations (ESCOs) that formed under the CEC Initiative varied greatly in their ability to generate cost savings and improve patient health outcomes. This study examined whether organizational or community characteristics were associated with ESCOs' performance.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

We used a retrospective pooled cross-sectional analysis of all 37 ESCOs participating in the CEC Initiative during 2015-2018 (n=87 ESCO-years). Key exposures included ESCO characteristics: number of dialysis facilities, number and types of physicians, and years of CEC Initiative experience. Outcomes of interest included were above versus below median gross financial savings (2.4%) and standardized mortality ratio (0.93). We analyzed unadjusted differences between high- and low-performing ESCOs and then used multivariable logistic regression to construct average marginal effect estimates for parameters of interest.

RESULTS

Above-median gross savings were obtained by 23 (52%) ESCOs with no program experience, 14 (32%) organizations with 1 year of experience, and seven (16%) organizations with 2 years of experience. The adjusted likelihoods of achieving above-median gross savings were 23 (95% confidence interval, 8 to 37) and 48 (95% confidence interval, 24 to 68) percentage points higher for ESCOs with 1 or 2 years of program experience, respectively (versus none). The adjusted likelihood of achieving above-median gross savings was 1.7 (95% confidence interval, -3 to -1) percentage points lower with each additional affiliated dialysis facility. Adjusted mortality rates were lower for ESCOs located in areas with higher socioeconomic status.

CONCLUSIONS

Smaller ESCOs, organizations with more experience in the CEC Initiative, and those located in more affluent areas performed better under the CEC Initiative.

Association of short-term exposure to ambient PM2.5 with hospital admissions and 30-day readmissions in end-stage renal disease patients: population-based retrospective cohort study

OBJECTIVES

To examine the effect of short-term exposure to ambient fine particulate matter (PM_2.5) on all-cause, cardiovascular and respiratory-related hospital admissions and readmissions among patients receiving outpatient haemodialysis.

DESIGN

Retrospective cohort study.

SETTING

Inpatient hospitalisation claims identified from the US Renal Data System in 530 US counties.

PARTICIPANTS

All patients receiving in-centre haemodialysis between 2008 and 2014.

PRIMARY AND SECONDARY OUTCOME MEASURES

Risk of all-cause, cardiovascular and respiratory-related hospital admissions and 30-day all-cause and cause-specific readmission following an all-cause, cardiovascular, and respiratory-related discharges. Readmission risk was evaluated for early (1-7 days postdischarge) and late (8-30 days postdischarge) readmission time periods. Relative risk is expressed per 10 μg/m³ of PM_2.5.

RESULTS

Same-day ambient PM_2.5 was associated with increased hospital admission risk for cardiovascular causes (0.9%, 95% CI 0.2 to 1.7). Greater PM_2.5-related associations were observed with 30-day readmission risk. Early-readmission risk was increased by 1.6%-1.8% following all-cause (1.6%, 95% CI 0.6% to 2.6%), cardiovascular (1.8%, 95% CI 0.4% to 3.2%) and respiratory (1.8%, 95% CI 0.4% to 3.2%) discharges; while late-readmission risk increased by 1.2%-1.3% following all-cause and cardiovascular discharges. PM_2.5-related associations with readmission risk were greatest for certain cause-specific readmissions ranging 4.0%-6.5% for dysrhythmia and conduction disorder, heart failure, chronic obstructive pulmonary disease, other non-cardiac chest pain or respiratory syndrome and pneumonia. Following all-cause discharges, the cause-specific early-readmission risk was increased by 6.5% (95% CI 3.5% to 9.6%) for pneumonia, 4.8% (95% CI 2.3% to 7.4%) for dysrhythmia and conduction disorder, 3.7% (95% CI 1.4% to 6.0%) for heart failure and 2.7% (95% CI 1.2% to 4.2%) for other non-cardiac chest pain or respiratory syndrome-related causes.

CONCLUSIONS

Daily ambient PM_2.5 was associated with an increased risk of cardiovascular admissions and 30-day readmissions following cardiopulmonary-related discharges in a vulnerable end-stage renal disease population. In the first week following discharge, greater PM_2.5-related risk of rehospitalisation was identified for some diagnoses.

Evaluating national trends in outcomes after implementation of a star rating system: Results from dialysis facility compare

OBJECTIVE

To examine which factors are driving improvement in the Dialysis Facility Compare (DFC) star ratings and to test whether nonclinical facility characteristics are associated with observed longitudinal changes in the star ratings.

DATA SOURCES

Data were collected from eligible patients in over 6,000 Medicare-certified dialysis facilities from three annual star rating and individual measure updates, publicly released on DFC in October 2015, October 2016, and April 2018.

STUDY DESIGN

Changes in the star rating and individual quality measures were investigated across three public data releases. Year-to-year changes in the star ratings were linked to facility characteristics, adjusting for baseline differences in quality measure performance.

DATA COLLECTION

Data from publicly reported quality measures, including standardized mortality, hospitalization, and transfusion ratios, dialysis adequacy, type of vascular access for dialysis, and management of mineral and bone disease, were extracted from annual DFC data releases.

PRINCIPAL FINDINGS

The proportion of four- and five-star facilities increased from 30.0% to 53.4% between October 2015 and April 2018. Quality improvement was driven by the domain of care containing the dialysis adequacy and hypercalcemia measures. Additionally, independently owned facilities and facilities belonging to smaller dialysis organizations had significantly lower odds of year-to-year improvement than facilities belonging to either of the two large dialysis organizations (Odds Ratio [OR]: 0.736, 95% Confidence Interval [CI]: 0.631-0.856 and OR: 0.797, 95% CI: 0.723-0.879, respectively).

CONCLUSIONS

The percentage of four- and five-star facilities has increased markedly over a three-year time period. These changes were driven by improvement in the specific quality measures that may be most directly under the control of the dialysis facility.

Mortality in US Hemodialysis Patients Following Exposure to Wildfire Smoke

BACKGROUND

Wildfires are increasingly a significant source of fine particulate matter (PM_2.5), which has been linked to adverse health effects and increased mortality. ESKD patients are potentially susceptible to this environmental stressor.

METHODS

We conducted a retrospective time-series analysis of the association between daily exposure to wildfire PM_2.5 and mortality in 253 counties near a major wildfire between 2008 and 2012. Using quasi-Poisson regression models, we estimated rate ratios (RRs) for all-cause mortality on the day of exposure and up to 30 days following exposure, adjusted for background PM_2.5, day of week, seasonality, and heat. We stratified the analysis by causes of death (cardiac, vascular, infectious, or other) and place of death (clinical or nonclinical setting) for differential PM_2.5 exposure and outcome classification.

RESULTS

We found 48,454 deaths matched to the 253 counties. A 10-μg/m³ increase in wildfire PM_2.5 associated with a 4% increase in all-cause mortality on the same day (RR, 1.04; 95% confidence interval [95% CI], 1.01 to 1.07) and 7% increase cumulatively over 30 days following exposure (RR, 1.07; 95% CI, 1.01 to 1.12). Risk was elevated following exposure for deaths occurring in nonclinical settings (RR, 1.07; 95% CI, 1.02 to 1.12), suggesting modification of exposure by place of death. "Other" deaths (those not attributed to cardiac, vascular, or infectious causes) accounted for the largest portion of deaths and had a strong same-day effect (RR, 1.08; 95% CI, 1.03 to 1.12) and cumulative effect over the 30-day period. On days with a wildfire PM_2.5 contribution >10 μg/m³, exposure accounted for 8.4% of mortality.

CONCLUSIONS

Wildfire smoke exposure was positively associated with all-cause mortality among patients receiving in-center hemodialysis.

Pharmacy-based methadone dispensing and drive time to methadone treatment in five states within the United States: A cross-sectional study

BACKGROUND

Within the United States, there is a shortage of opioid treatment programs (OTPs), facilities which dispense methadone for opioid use disorder. It is unknown how pharmacy-based methadone dispensing, as available internationally, could affect methadone access. We aimed to compare drive times to the nearest OTP with drive times to the nearest chain pharmacy in urban and rural census tracts.

METHODS

Cross-sectional geospatial analysis of 2018 OTP location data and 2017 pharmacy location data. We included census tracts with non-zero population in Indiana, Kentucky, Ohio, Virginia, and West Virginia, states with highest rates of opioid overdose deaths. Our outcome was minimum drive time in minutes from census tract mean center of population to the nearest dispensing facility.

RESULTS

Among 7918 census tracts, median (IQR) drive time to OTPs increased from urban to increasingly rural census tract classification [16.1 min (10.2-25.9) to 48.4 min (34.0-63.3);p < .001]. Median (IQR) drive time to OTPs was greater than drive time to chain pharmacies among all census tracts: 19.6 min (11.6-35.1) versus 4.4 min (2.9-7.7) respectively; p < .001. The median (IQR) difference in drive time was greater for increasingly rural census tracts [11.5 min (6.1-19.2) to 35.2 min (19.6-49.7); p <.001] with pharmacy-based methadone dispensing.

CONCLUSION

Rural census tracts have disproportionately long drive times to OTPs. Drawing from policies to increase methadone access in countries like Canada and Australia, this geographic methadone disparity could be mitigated through implementation of pharmacy-based methadone dispensing.

Distance to Kidney Transplant Center and Access to Early Steps in the Kidney Transplantation Process in the Southeastern United States

BACKGROUND AND OBJECTIVES

Access to kidney transplantation requires a referral to a transplant center for medical evaluation. Prior research suggests that the distance that a person must travel to reach a center might be a barrier to referral. We examined whether a shorter distance from patients' residence to a transplant center increased the likelihood of referral and initiating the transplant evaluation once referred.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

Adults who began treatment for ESKD at any Georgia, North Carolina, or South Carolina dialysis facility from 1/1/2012 to 12/31/2015 were identified from the US Renal Data System. Referral (within 1 year of dialysis initiation) and evaluation initiation (within 6 months of referral) data were collected from all nine transplant centers located in that region. Distance was categorized as <15, 15-30, 31-60, 61-90, and >90 miles from the center of a patient's residential zip code to the nearest center. We used multilevel, multivariable-adjusted logistic regression to quantify the association between distance with referral and evaluation initiation.

RESULTS

Among 27,250 adult patients on incident dialysis, 9582 (35%) were referred. Among those referred, 58% initiated evaluation. Although patients who lived farther from a center were less likely to be referred, distance was not statistically significantly related to transplant referral: adjusted odds ratios of 1.08 (95% confidence interval, 0.96 to 1.22), 1.07 (95% confidence interval, 0.95 to 1.22), 0.96 (95% confidence interval, 0.84 to 1.10), and 0.87 (95% confidence interval, 0.74 to 1.03) for 15-30, 31-60, 61-90, and >90 miles, respectively, compared with <15 miles (P trend =0.05). There was no statistically significant association of distance and evaluation initiation among referred patients: adjusted odds ratios of 1.14 (95% confidence interval, 0.97 to 1.33), 1.12 (95% confidence interval, 0.94 to 1.35), 1.04 (95% confidence interval, 0.87 to 1.25), and 0.89 (95% confidence interval, 0.72 to 1.11) for 15-30, 31-60, 61-90, and >90 miles, respectively, compared with <15 miles (P trend =0.70).

CONCLUSIONS

Distance from residence to transplant center among patients undergoing long-term dialysis in the southeastern United States was not associated with increased likelihood of referral and initiating transplant center evaluation.

Bundled Payment Reform and Dialysis Facility Closures in ESKD

BACKGROUND

In 2011, inclusion of injectable medications into an expanded ESKD payment bundle prompted concerns that dialysis facilities facing higher costs might close, disrupting care delivery and access to care. Whether this policy change influenced dialysis facility closures is unknown.

METHODS

To examine whether facility closures increased after 2011 and whether factors influencing closures changed, we analyzed US Renal Data System registry data to identify all patients receiving in-center hemodialysis from 2006 through 2015 and to track dialysis facility closures. We used interrupted time series logistic regression models and estimated marginal effects to examine immediate and longer-term changes in the likelihood of being affected by facility closures following payment reform. We also examined whether associations between selected predictors of closures indicating populations at "high risk" of closure (patient characteristics, facility characteristics, and geography-related characteristics) and closures changed after payment reform.

RESULTS

Dialysis facility closures were uncommon over the study period. In adjusted models, the relative odds of experiencing a closure declined by 37% (odds ratio [OR], 0.63; 95% confidence interval [95% CI], 0.59 to 0.67) immediately after payment reform and declined by an additional 6% (OR, 0.94; 95% CI, 0.91 to 0.97) annually thereafter, corresponding to a 0.3% lower absolute probability of closure in 2015 in association with payment reform. Patients who were black and who dialyzed at small, hospital-based facilities experienced slight increases in closures following payment reform, whereas Hispanic and Medicare/Medicaid dual-eligible patients experienced slight decreases in closures.

CONCLUSIONS

Expansion of the ESKD payment bundle was not associated with increased closure of dialysis facilities, although the likelihood of closures changed slightly for some higher-risk populations.

Are Rural Opioid Treatment Program (OTP) Facilities Associated with Lower Deaths?

Objectives: Rural areas have been particularly affected by the opioid epidemic in the U.S., with treatment options being scarce. This study focuses on opioid treatment programs (OTPs), which combine counseling services and opioid-related medication provision. In the South census region (comprised of 16 states and D.C.), 156 urban counties and 27 rural counties contained OTPs as of 2013. We examine whether their presence is associated with lower opioid-related death rates during 2014-2016. Methods: Coarsened exact matching (CEM) is used to match treated and untreated counties on demographic characteristics and opioid-related deaths from 2011 to 2013. Two treatments are considered: (1) if a county had an OTP in 2013; and (2) if an OTP existed in a neighboring county in 2013. The matched samples are then used in weighted least square regression models, with propensity score matching serving as a robustness check. Rural and urban counties are analyzed separately to determine if the impact of OTPs differs between these areas. Results: Results show that the presence of an OTP mostly has no statistical association with the rate of (or change in) future opioid deaths, in either rural or urban counties. Proximity to a neighboring county OTP displays a similar lack of association. Conclusions: The findings suggest that OTPs are not associated with fewer opioid-related deaths in the South over the near term, regardless of rural or urban location. These results could be attributed to outside factors that hinder this relationship. Continued assessment of varied approaches to the rural opioid crisis is encouraged.

Landscapes of healthcare utilization during a dengue fever outbreak in an urban environment of Colombia

The well-being of a population and its health are influenced by a myriad of socioeconomic and environmental factors that interact across a wide range of scales, from the individual to the national and global levels. One of these factors is the provision of health services, which is regulated by both demand and supply. Although an adequate provision can significantly improve health outcomes of a population, lopsided flow of patients to specific health centers can result in serious disparities and potentially delay the timeliness of a diagnosis. In this paper, utilization patterns during an epidemic of dengue fever in the city of Cali, Colombia for the year 2010 are investigated. Specifically, the objectives are to (1) identify health facilities that exhibit patterns of over- and underutilization, (2) determine where patients who are being diagnosed at a particular facility originate from, and (3) whether patients are traveling to their closest facility and hence (4) estimate how far patients are willing to travel to be diagnosed and treated for dengue fever. Analysis is further decomposed by age group and by gender, in an attempt to test whether utilization patterns drastically change according to these variables. Answers to these questions can help health authorities plan for future epidemics, for instance, by providing guidelines as to which facilities require more resources and by improving the organization of health prevention campaigns to direct population seeking health assistance to use facilities that are underutilized.

Health-related quality of life changes following renal transplantation in children

BACKGROUND

Studies of HRQoL after kidney transplant have yielded conflicting results. We sought to assess the impact of kidney transplant on HRQoL.

METHODS

We performed a retrospective study using the PedsQL3.0ESRD module during dialysis and at 3 and 12 months following kidney transplant in 56 recipients. For the entire cohort, we described HRQoL scores at each time point and used ANOVA models to test for associations between demographic and transplant-related factors and post-transplant scores. We used linear mixed models to investigate interactions between transplant and demographic and transplant-related factors and to estimate differences between mean pre- and post-transplant scores. Longitudinal changes in HRQoL were assessed by t test.

RESULTS

We found increases in all mean total scores, including subscales, at each assessed time period from dialysis to 3 months post-transplant to 12 months post-transplant. Post-transplant total scores did not differ by gender, race, proximity to hospital, allograft source, or dialysis modality, but did differ by recipient age. Among participants with both pre- and post-transplant observations, total scores increased for both recipients and parent-proxies.

CONCLUSIONS

This study affirms the association between kidney transplant and improvement in HRQoL in the first year following transplant. Future research should further explore outcomes over the longer-term and factors contributing to HRQoL among this population.

Change of access to emergency care in a repopulated village after the 2011 Fukushima nuclear disaster: a retrospective observational study

OBJECTIVES

Sustaining emergency care access is of great concern. The aim of this study is to evaluate access to emergency care in a repopulated village following the 2011 Fukushima disaster.

DESIGN

This research was a retrospective observational study. The primary outcome measure was total emergency medical services (EMS) time. A Bayesian time series analysis was performed to consider local time series trend and seasonality.

SETTING

The residents in Kawauchi Village, Fukushima, Japan were forced to evacuate after the 2011 Fukushima disaster. As the radiation dose was an acceptable level, the residents began the process of repopulation in April 2012.

PARTICIPANTS

This study included patients transported by EMS from January 2009 to October 2015. Patients transported during the evacuation period (from March 2011 to March 2012) were excluded.

RESULTS

A total of 781 patients were transferred by EMS (281 patients before the disaster, 416 after repopulation and 84 during the evacuation period). A Bayesian time series analysis revealed an increase in total EMS time, from the first request call to arrival at a hospital of 21.85 min (95% credible interval 14.2-29.0, Bayesian one-sided tail-area probability p=0.001). After the disaster, 42.3% of patients were transported to a partner hospital.

CONCLUSIONS

Total EMS time increased after repopulation of the area affected because of a massive number of hospital closures. Proactive partnerships would be a possible countermeasure in the affected areas after a major disaster.

Structural barriers to comprehensive, coordinated HIV care: geographic accessibility in the US South

Structural barriers to HIV care are particularly challenging in the US South, which has higher HIV diagnosis rates, poverty, uninsurance, HIV stigma, and rurality, and fewer comprehensive public health programs versus other US regions. Focusing on one structural barrier, we examined geographic accessibility to comprehensive, coordinated HIV care (HIVCCC) in the US South. We integrated publicly available data to study travel time to HIVCCC in 16 Southern states and District of Columbia. We geocoded HIVCCC service locations and estimated drive time between the population-weighted county centroid and closest HIVCCC facility. We evaluated drive time in aggregate, and by county-level HIV prevalence quintile, urbanicity, and race/ethnicity. Optimal drive time was ≤30 min, a common primary care accessibility threshold. We identified 228 service locations providing HIVCCC across 1422 Southern counties, with median drive time to care of 70 min (IQR 64 min). For 368 counties in the top HIV prevalence quintile, median drive time is 50 min (IQR 61 min), exceeding 60 min in over one-third of these counties. Among counties in the top HIV prevalence quintile, drive time to care is six-folder higher for rural versus super-urban counties. Counties in the top HIV prevalence quintiles for non-Hispanic Blacks and for Hispanics have >50% longer drive time to care versus for non-Hispanic Whites. Including another potential care source-publicly-funded health centers serving low-income populations-could double the number of high-HIV burden counties with drive time ≤30 min, representing nearly 35,000 additional people living with HIV with accessible HIVCCC. Geographic accessibility to HIVCCC is inadequate in the US South, even in high HIV burden areas, and geographic and racial/ethnic disparities exist. Structural factors, such as geographic accessibility to care, may drive disparities in health outcomes. Further research on programmatic policies, and evidence-based alternative HIV care delivery models improving access to care, is critical.

Long-term vulnerability of access to hemodialysis facilities in repopulated areas after the Fukushima Nuclear Disaster: a case report

In 2011, an earthquake and tsunami struck Japan, and these were followed by the Fukushima Daiichi nuclear power plant accident. The long-term impact on hemodialysis care access in rural areas after the disaster is unknown. Here we report on a 66-year-old male hemodialysis patient who was forced to evacuate and relocate multiple times to receive hemodialysis after the accident. While he returned to his hometown in 2012, all the available hemodialysis facilities had been placed in different districts. Therefore, the patient needed to cross a mountain to visit the hemodialysis facility. On a snowy day, the patient was unable to reach hemodialysis care in a timely manner. With community cooperation, a public ambulance successfully transferred the patient via a detour, taking 4 h to reach the hemodialysis facility. This case demonstrates that access to hemodialysis care in rural areas remains vulnerable even in the long term after a nuclear disaster.

The Economic Burden of Chronic Kidney Disease and End-Stage Renal Disease

The growing prevalence and progression of chronic kidney disease (CKD) raises concerns about our capacity to manage its economic burden to patients, caregivers, and society. The societal direct and indirect costs of CKD and end-stage renal disease are substantial and increase throughout disease progression. There is significant variability in the evidence about direct and indirect costs attributable to CKD and end-stage renal disease, with the most complete evidence concentrated on direct health care costs of patients with advanced to end-stage CKD. There are substantial gaps in evidence that need to be filled to inform clinical practice and policy.

Telemedicine and primary care obesity management in rural areas - innovative approach for older adults?

BACKGROUND

The growing prevalence of obesity is paralleling a rise in the older adult population creating an increased risk of functional impairment, nursing home placement and early mortality. The Centers for Medicare and Medicaid recognized the importance of treating obesity and instituted a benefit in primary care settings to encourage intensive behavioral therapy in beneficiaries by primary care clinicians. This benefit covers frequent, brief, clinic visits designed to address older adult obesity.

DISCUSSION

We describe the challenges in the implementation and delivery into real-world settings. The challenges in rural settings that have the fastest growing elderly population, high obesity rates, but also workforce shortages and lack of specialized services are emphasized. The use of Telemedicine has successfully been implemented in other specialties and could be a useful modality in delivering much needed intensive behavioral therapy, particularly in distant, under-resourced environments. This review outlines some of the challenges with the current benefit and proposed solutions in overcoming rural primary care barriers to implementation, including changes in staffing models.

CONCLUSIONS

Recommendations to extend the benefit's coverage to be more inclusive of non-physician team members is needed but also for improvement in reimbursement for telemedicine services for older adults with obesity.

Differences in Women's Use of Medical Help for Becoming Pregnant by the Level of Urbanization of County of Residence in Georgia

PURPOSE

Our goal was to determine if there are differences by place of residence in visiting a doctor for help getting pregnant in a population-based study.

METHODS

Using data from the Furthering Understanding of Cancer, Health, and Survivorship in Adult (FUCHSIA) Women's Study, a cohort study of fertility outcomes in reproductive-aged women in Georgia, we fit models to estimate the association between geographic type of residence and seeking help for becoming pregnant.

FINDINGS

The prevalence of visiting a doctor for help getting pregnant ranged from 13% to 17% across geographic groups. Women living in suburban counties were most likely to seek medical care for help getting pregnant compared with women living in urbanized counties (adjusted prevalence ratio (aPR) = 1.14, 95% CI: 0.74-1.75); among women who reported infertility this difference was more pronounced (aPR = 1.59, 95% CI: 1.00-2.53). Women living in rural counties were equally likely to seek fertility care compared with women in urbanized counties in the full sample and among women who experienced infertility.

CONCLUSIONS

Women living in urban and rural counties were least likely to seek infertility care, suggesting that factors including but not limited to physical proximity to providers are influencing utilization of this type of care. Increased communication about reproductive goals and infertility care available to meet these goals by providers who women see for regular care may help address these barriers.

Proximity Does Not Equal Access: Racial Disparities in Access to High Quality Dialysis Facilities

BACKGROUND

For patients receiving hemodialysis, distance to their dialysis facility may be particularly important due to the need for thrice weekly dialysis. We sought to determine whether African-Americans and Whites differ in proximity and access to high quality dialysis facilities.

METHODS

We analyzed urban, Whites and African-Americans aged 18-65 receiving in-center hemodialysis linked to data on neighborhood and dialysis facility quality measures. In multivariable analyses, we examined the association between individual and neighborhood characteristics, and our outcomes: distance from home zip code to nearest dialysis facility, their current facility and the nearest high quality facility, as well as likelihood of receiving dialysis in a high quality facility.

RESULTS

African-Americans lived a half mile closer to a dialysis facility (B=-0.52) but traveled the same distance to their own dialysis facility compared to Whites. In initial analysis, African-Americans are 14% less likely than their White counterparts to attend a high quality dialysis facility (OR 0.86); and those disparities persist, though are reduced, even after adjusting for region, neighborhood poverty and percent African-American. In predominately African-American neighborhoods, individuals lived closer to high quality facilities (B=--5.92), but were 53% less likely to receive dialysis there (OR 0.47, highest group versus lowest, p<0.05). Living in a predominately African-American neighborhood explains 24% of racial disparity in attending a high quality facility.

CONCLUSIONS

African-Americans' proximity to high quality facilities does not lead to receiving care there. Institutional and social barriers may also play an important role in where people receive dialysis.

Association of increased travel distance to dialysis units with the risk of anemia in rural chronic hemodialysis elderly

Geographic remoteness has been found to influence health-related outcomes negatively. As reported in the literature, rural dialysis patients have a higher risk of mortality with increasing travel distance to dialysis units. However, few studies have focused on the impact of travel distances on the development of dialysis complications. We utilized a prospectively collected chronic hemodialysis patient cohort from a rural regional hospital for analysis. Data on demographics, comorbidities, and serum laboratory results were obtained. Correlation analyses between travel distance to dialysis units and dialysis complications were conducted, and significantly correlated parameters were entered into multivariate logistic regression models to determine their exact associations. A total of 46 rural chronic hemodialysis patients were enrolled, with an average age higher than others in the literature. Significant correlation was found between travel distance and serum hemoglobin levels (R(2) = -0.34, P value = 0.029). Multivariate logistic regression found that every 1 km increase in travel distance was associated with an increased risk of anemia (hemoglobin <9 g/dL) (odds ratio 1.46; P value = 0.01). Sensitivity analyses further showed that the associated risk was partially attenuated by serum albumin (odds ratio 1.83; P value = 0.07) and ferritin (odds ratio 1.39; P value = 0.08) levels. This is the first study to demonstrate the association between increased travel distance to dialysis units and the risk of anemia in chronic dialysis patients, especially elderly. Malnutrition, inflammation, and atherosclerosis syndrome could be partially responsible for the observed association. Further research is required to confirm our findings.