Race/ethnicity, age, and risk of hospital admission and length of stay during the first year of maintenance hemodialysis

Racial/ethnic disparities in inpatient palliative care utilization and hospitalization outcomes among patients with colorectal cancer

PURPOSE

Research has shown that racial/ethnic disparities exist in outcomes for colorectal cancer (CRC) patients, but there are no studies assessing inpatient palliative care utilization and hospitalization outcomes in this population. We examined racial/ethnic disparities in palliative care utilization and hospitalization outcomes among CRC and early-onset CRC patients.

METHODS

Using National Inpatient Sample (NIS) data collected between 2016 and 2018, cross-sectional analyses were performed. Descriptive analyses were done, stratified by race/ethnicity. Multivariable logistic and linear regression models were used to examine racial/ethnic differences in palliative care utilization, inpatient mortality, chemotherapy/radiotherapy use, length of stay and total hospital charges among hospitalized patients with CRC and early-onset CRC.

RESULTS

Blacks had higher odds (AOR: 1.09; 95% CI: 1.03-1.16) of receiving palliative care consultation while Hispanics had lower odds (AOR: 0.90; 95% CI: 0.84-0.96) compared to Whites. Blacks had 1.1 times higher odds (95% CI: 1.01-1.18) of inpatient mortality relative to Whites while Hispanics had 16% (AOR: 0.84; 95% CI: 0.76-0.93) lower odds of inpatient mortality. Compared to Whites, Blacks (AOR: 1.99; 95% CI: 1.64-2.41), Hispanics (AOR: 2.49; 95% CI: 1.94-3.19) and colorectal cancer patients in the other category (AOR: 1.72; 95% CI: 1.35-2.18) were more likely to receive inpatient treatment with chemotherapy/radiotherapy. Furthermore, Black patients were 1.1 times (95% CI: 1.06-1.14) more likely to have a length of stay more than 5 days. Blacks (𝛃: $3,096.7; 95% CI: $1,207.0-$4,986.5) Hispanic (𝛃: $10,237.5; 95% CI: $7,558.2-$12,916.8) and other patients (𝛃: $6,332.0; 95% CI: $2,830.9-$9, 833.2) had higher hospital charges relative to their White counterparts. Among patients with early onset CRC, Blacks had higher palliative care use (AOR: 1.29; 95% CI: 1.10-1.51) and inpatient mortality (AOR: 1.38; 95% CI: 1.06-1.79) while Hispanics reported $5,589.7 (95% CI: $683.2-$10,496.2) higher total hospital charges and were more likely to receive inpatient chemotherapy/radiotherapy (AOR: 2.48; 95% CI: 1.70-3.63).

CONCLUSION

Further research is needed to explore specific cultural, socioeconomic, and political factors that explain these disparities and identify ways to narrow the gap. Meanwhile, the healthcare sector will need to assess what strategies might be helpful in addressing these disparities in outcomes in the context of other socioeconomic and cultural factors that may be affecting the patients.

Material Need Insecurities among People on Hemodialysis: Burden, Sociodemographic Risk Factors, and Associations with Substance Use

Key Points

Food insecurity and housing instability may affect dialysis outcomes through health behaviors like treatment adherence and their effect on access to transplantation or home dialysis therapies. People on hemodialysis who were younger, with less educational attainment, with lower incomes, or experiencing financial strain were more likely to experience material need insecurities. Participant race was not associated with material need insecurities, although residential segregation moderated associations between age, sex, and food insecurity.

Background

Despite their relevance to health outcomes, reports of food insecurity and housing instability rates among adults on hemodialysis are limited. Their relation to sociodemographic and behavioral factors are unknown for this population.

Methods

We enrolled a convenience sample of people receiving hemodialysis at Baltimore and Washington, DC metropolitan area facilities. Participants completed measures of socioeconomic position, food insecurity, housing instability, and substance use disorder. We cross-referenced participant and facility zip codes with measures of area poverty and residential segregation. We examined associations between individual-level and area-level sociodemographic characteristics, food insecurity, and housing instability using multivariable logistic regression models.

Results

Of the 305 participants who completed study surveys, 57% were men and 70% were Black, and the mean age was 60 years. Thirty-six percent of the sample reported food insecurity, 18% reported housing instability, and 31% reported moderate or high-risk substance use. People on hemodialysis who were younger, with lower educational attainment, with lower incomes, or experiencing financial strain were more likely to have material need insecurities (P < 0.05 for all). Among participants living in segregated jurisdictions, men had increased odds of food insecurity compared with women (odds ratio 3.7; 95% confidence interval, 1.61 to 8.53); younger participants (age <55 years) had increased odds of food insecurity compared with older participants (odds ratio 3.3; 95% confidence interval, 1.49 to 7.32). Associations between sex or younger age category and food insecurity were not statistically significant in less segregated counties (P interaction for residential segregation×sex: P = 0.006; residential segregation×younger age category: P = 0.12).

Conclusions

Food insecurity, housing instability, and substance use were common among this sample of adults on hemodialysis. Younger adults on hemodialysis, particularly those living in residentially segregated jurisdictions, were at increased risk for food insecurity. Future research should examine whether material need insecurities perpetuate disparities in dialysis outcomes.

Podcast

This article contains a podcast at https://dts.podtrac.com/redirect.mp3/www.asn-online.org/media/podcast/K360/2023_12_01_KID0000000000000279.mp3

Vital Signs: Health Disparities in Hemodialysis-Associated Staphylococcus aureus Bloodstream Infections - United States, 2017-2020

Introduction

Racial and ethnic minorities are disproportionately affected by end-stage kidney disease (ESKD). ESKD patients on dialysis are at increased risk for Staphylococcus aureus bloodstream infections, but racial, ethnic, and socioeconomic disparities associated with this outcome are not well described.

Methods

Surveillance data from the 2020 National Healthcare Safety Network (NHSN) and the 2017-2020 Emerging Infections Program (EIP) were used to describe bloodstream infections among patients on hemodialysis (hemodialysis patients) and were linked to population-based data sources (CDC/Agency for Toxic Substances and Disease Registry [ATSDR] Social Vulnerability Index [SVI], United States Renal Data System [USRDS], and U.S. Census Bureau) to examine associations with race, ethnicity, and social determinants of health.

Results

In 2020, 4,840 dialysis facilities reported 14,822 bloodstream infections to NHSN; 34.2% were attributable to S. aureus. Among seven EIP sites, the S. aureus bloodstream infection rate during 2017-2020 was 100 times higher among hemodialysis patients (4,248 of 100,000 person-years) than among adults not on hemodialysis (42 of 100,000 person-years). Unadjusted S. aureus bloodstream infection rates were highest among non-Hispanic Black or African American (Black) and Hispanic or Latino (Hispanic) hemodialysis patients. Vascular access via central venous catheter was strongly associated with S. aureus bloodstream infections (NHSN: adjusted rate ratio [aRR] = 6.2; 95% CI = 5.7-6.7 versus fistula; EIP: aRR = 4.3; 95% CI = 3.9-4.8 versus fistula or graft). Adjusting for EIP site of residence, sex, and vascular access type, S. aureus bloodstream infection risk in EIP was highest in Hispanic patients (aRR = 1.4; 95% CI = 1.2-1.7 versus non-Hispanic White [White] patients), and patients aged 18-49 years (aRR = 1.7; 95% CI = 1.5-1.9 versus patients aged ≥65 years). Areas with higher poverty levels, crowding, and lower education levels accounted for disproportionately higher proportions of hemodialysis-associated S. aureus bloodstream infections.

Conclusions and implications for public health practice

Disparities exist in hemodialysis-associated S. aureus infections. Health care providers and public health professionals should prioritize prevention and optimized treatment of ESKD, identify and address barriers to lower-risk vascular access placement, and implement established best practices to prevent bloodstream infections.

Sex Differences in the Recognition, Monitoring, and Management of CKD in Health Care: An Observational Cohort Study

INTRODUCTION

Reported sex differences in the etiology, population prevalence, progression rates, and health outcomes of people with CKD may be explained by differences in health care.

METHODS

We evaluated sex as the variable of interest in a health care-based study of adults (n=227,847) with at least one outpatient eGFR<60 ml/min per 1.73 m2 measurement denoting probable CKD in Stockholm from 2009 to 2017. We calculated the odds ratios for diagnosis of CKD and provision of RASi and statins at inclusion, and hazard ratios for CKD diagnosis, visiting a nephrologist, or monitoring creatinine and albuminuria during follow-up.

RESULTS

We identified 227,847 subjects, of whom 126,289 were women (55%). At inclusion, women had lower odds of having received a diagnostic code for CKD and were less likely to have received RASi and statins, despite having guideline-recommended indications. In time-to-event analyses, women were less likely to have received a CKD diagnosis (HR, 0.43; 95% CI, 0.42 to 0.45) and visited a nephrologist (HR, 0.46; 95% CI, 0.43 to 0.48) regardless of disease severity, presence of albuminuria, or criteria for referral. Women were also less likely to undergo monitoring of creatinine or albuminuria, including those with diabetes or hypertension. These differences remained after adjustment for comorbidities, albuminuria, and highest educational achievement, and among subjects with confirmed CKD at retesting. Although in absolute terms all nephrology-care indicators gradually improved over time, the observed sex gap persisted.

CONCLUSIONS

There were profound sex differences in the detection, recognition, monitoring, referrals, and management of CKD. The disparity was also observed in people at high risk and among those who had guideline-recommended indications.

PODCAST

This article contains a podcast at https://www.asn-online.org/media/podcast/JASN/2022_10_11_JASN2022030373.mp3.

Dialysis attendance patterns and health care utilisation of Aboriginal patients attending dialysis services in urban, rural and remote locations

Background

Aboriginal people in the Northern Territory (NT) suffer the heaviest burden of kidney failure in Australia with most living in remote areas at time of dialysis commencement. As there are few dialysis services in remote areas, many Aboriginal people are required to relocate often permanently, to access treatment. Missing dialysis treatments is not uncommon amongst Aboriginal patients but the relationship between location of dialysis service and dialysis attendance (and subsequent hospital use) has not been explored to date.

Aim

To examine the relationships between location of dialysis service, dialysis attendance patterns and downstream health service use (overnight hospital admissions, emergency department presentations) among Aboriginal patients in the NT.

Methods

Using linked hospital and dialysis registry datasets we analysed health service activity for 896 Aboriginal maintenance dialysis patients in the NT between 2008 and 2014. Multivariate linear regression and negative binomial regression analyses explored the associations between dialysis location, dialysis attendance and health service use.

Results

We found missing two or more dialysis treatments per month was more likely for Aboriginal people attending urban services and this was associated with a two-fold increase in the rate of hospital admissions and more than three-fold increase in ED presentations. However, we found higher dialysis attendance and lower health service utilisation for those receiving care in rural and remote settings. When adjusted for age, time on dialysis, region, comorbidities and residence pre-treatment, among Aboriginal people from remote areas, those dialysing in remote areas had lower rates of hospitalisations (IRR 0.56; P < 0.001) when compared to those who relocated and dialysed in urban areas.

Conclusion

There is a clear relationship between the provision and uptake of dialysis services in urban, rural and remote areas in the NT and subsequent broader health service utilisation. Our study suggests that the low dialysis attendance associated with relocation and care in urban models for Aboriginal people can potentially be ameliorated by access to rural and remote models and this warrants a rethinking of service delivery policy. If providers are to deliver effective and equitable services, the full range of intended and unintended consequences of a dialysis location should be incorporated into planning decisions.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12913-022-07628-9.

Hospitalization patterns in HD patients in the Kingdom of Saudi Arabia: A comprehensive cohort study

INTRODUCTION

The rate of hospitalization represents a morbidity indicator in HD patients. The study aimed to evaluate hospitalization patterns in a large HD cohort.

METHODS

All DaVita-KSA HD patients from October 2014 to December 2019 were included. Demographical and clinical characteristics and hospitalization data were recorded. Less than 24 h admission was excluded. Overall and cause-specific hospitalization rates were calculated.

RESULTS

During the follow-up period, 3982 patients with a mean age of 52.5 ± 16.8 years, 2667 hospitalizations were recorded in 34.1% of the patients and 45.6% had repeated admissions. Infectious causes accounted for 26.6% of all recorded causes vs. 15.6% for cardiovascular complications. The median hospital stay length was 11 days, while the overall annual hospitalization rate of 34.9% and the annual duration of 3.7 days per patient. Hospitalized patients had a higher risk of mortality (p < 0.001).

CONCLUSION

Infectious complications were the leading cause of hospitalization and had the longest hospital stay.

Frailty Severity and Hospitalization After Dialysis Initiation

Background:

Frailty is associated with hospitalization and mortality among dialysis patients. To now, few studies have considered the degree of frailty as a predictor of hospitalization.

Objective:

We evaluated whether frailty severity was associated with hospitalization after dialysis initiation.

Design:

Retrolective cohort study.

Setting:

Nova Scotia, Canada.

Patients:

Consecutive adult, chronic dialysis patients who initiated dialysis from January 1, 2009 to June 30, 2014, (last follow-up June, 2015).

Methods:

Frailty Severity, as determined by the 7-point Clinical Frailty Scale (CFS, ranging from 1 = very fit to 7 = severely frail), was measured at dialysis initiation and treated as continuous and in categories (CFS scores of 1-3, 4/5, and 6/7). Hospitalization was characterized by cumulative time admitted to hospital (proportion of days admitted/time at risk) and by the joint risk of hospitalization and death. Time at risk included time in hospital after dialysis initiation and patients were followed until transplantation or death.

Results:

Of 647 patients (mean age: 62 ± 15), 564 (87%) had CFS scores. The mean CFS score was 4 (“corresponding to “vulnerable”) ± 2 (“well” to “moderately frail”). In an adjusted negative binomial regression model, moderate-severely frail patients (CFS 6/7) had a >2-fold increased risk of cumulative time admitted to hospital compared to the lowest CFS category (IRR = 2.18, 95% confidence interval [CI] = 1.31-3.63). In the joint model, moderate-severely frail patients had a 61% increase in the relative hazard for hospitalization (hazard ratio [HR] = 1.61, 95% CI = 1.29-2.02) and a 93% increase in the relative hazard for death compared to the lowest CFS category (HR = 1.93, 95% CI = 1.16-3.22).

Limitations:

Potential unknown confounders may have affected the association between frailty severity and hospitalization given observational study design. The CFS is subjective and different clinicians may grade frailty severity differently or misclassify patients on the basis of limited availability.

Conclusions:

Among incident dialysis patients, a higher frailty severity as defined by the CFS is associated with both an increased risk of cumulative time admitted to hospital and joint risk of hospitalization and death.

Risk of Cardiovascular Outcomes and Antihypertensive Triple Combination Therapy Among Elderly Patients with Hypertension Enrolled in a Medicare Advantage Plan (MAP)

OBJECTIVES

The aim was to evaluate the risk of cardiovascular-specific hospitalizations with different types of antihypertensive triple combination therapy among patients enrolled in a Medicare Advantage Plan (MAP).

METHODS

A retrospective cohort study was conducted among patients with hypertension enrolled in a Texas MAP between January 2014 and December 2016. Antihypertensive combination therapy users were classified into three treatment groups: single-pill triple combination, fixed-dose dual combination plus a third agent, and free triple combination. Group differences were assessed using Chi-square tests for binary variables and Student's t tests for continuous variables. Cox proportional hazards model was performed to assess the association between type of combination therapy and risk of cardiovascular-specific hospitalization adjusting for potential confounders.

RESULTS

A total of 10,836 triple combination users were identified. The risk of cardiovascular disease (CVD) hospitalization for the fixed-dose dual combination plus a third agent group [hazard ratio (HR) 3.82, 95% confidence interval (CI) 1.80-8.12] and for the free triple combination therapy group (HR 3.65, 95% CI 1.43-9.31) was significantly higher than for the single-pill triple combination group.

CONCLUSION

Single-pill triple combination therapy was significantly associated with a lower risk of CVD hospitalizations in comparison to other types of triple combination therapy.

Community Racial Composition and Hospitalization Among Patients Receiving In-Center Hemodialysis

RATIONALE & OBJECTIVE

Community racial composition has been shown to be associated with mortality in patients receiving maintenenance dialysis. It is unclear whether living in communities with predominantly Black residents is also associated with risk for hospitalization among patients receiving hemodialysis.

STUDY DESIGN

Retrospective analysis of prospectively collected data from a cohort of patients receiving hemodialysis.

SETTING & PARTICIPANTS

4,567 patients treated in 154 dialysis facilities located in 127 unique zip codes and enrolled in US Dialysis Outcomes and Practice Patterns Study (DOPPS) phases 4 to 5 (2010-2015).

EXPOSURE

Tertile of percentage of Black residents within zip code of patients' dialysis facility, defined through a link to the American Community Survey.

OUTCOME

Rate of hospitalizations during the study period.

ANALYTIC APPROACH

Associations of patient-, facility-, and community-level variables with community's percentage of Black residents were assessed using analysis of variance, Kruskal-Wallis, or χ2/Fisher exact tests. Negative binomial regression was used to estimate the incidence rate ratio for hospitalizations between these communities, with and without adjustment for potential confounding variables.

RESULTS

Mean age of study patients was 62.7 years. 53% were White, 27% were Black, and 45% were women. Median and threshold percentages of Black residents in zip codes in which dialysis facilities were located were 34.2% and≥14.4% for tertile 3 and 1.0% and≤1.8% for tertile 1, respectively. Compared with those in tertile 1 facilities, patients in tertile 3 facilities were more likely to be younger, be Black, live in urban communities with lower socioeconomic status, have a catheter as vascular access, and have fewer comorbid conditions. Patients dialyzing in communities with the highest tertile of Black residents experienced a higher adjusted rate of hospitalization (adjusted incidence rate ratio, 1.32; 95% CI, 1.12-1.56) compared with those treated in communities within the lowest tertile.

LIMITATIONS

Potential residual confounding.

CONCLUSIONS

The risk for hospitalization for patients receiving maintenance dialysis is higher among those treated in communities with a higher percentage of Black residents after adjustment for dialysis care, patient demographics, and comorbid conditions. Understanding the cause of this association should be a priority of future investigation.

Operative Incision and Drainage for Perirectal Abscesses: What Are Risk Factors for Prolonged Length of Stay, Reoperation, and Readmission?

BACKGROUND

Perirectal abscess is a common problem. Despite a seemingly simple disease to manage, clinical outcomes of perirectal abscesses can vary significantly given the wide array of patients who are susceptible to this disease.

OBJECTIVE

Our aims were to evaluate the outcomes after operative incision and drainage for perirectal abscess and to examine factors associated with length of stay, reoperations, and readmissions.

DESIGN

This was a retrospective analysis of the National Surgical Quality Improvement Program database.

SETTINGS

The study was conducted with hospitals participating in the surgical database.

PATIENTS

Adult patients undergoing outpatient perirectal abscess procedures from 2011 through 2016 were included.

MAIN OUTCOME MEASURES

Study outcomes were length of stay, reoperation, and readmission.

RESULTS

We identified 2358 patients undergoing incision and drainage for perirectal abscesses. Approximately 35% of patients required hospital stay. Reoperations occurred in 3.4%, with median time to reoperation of 15.5 days. The majority of reoperations (79.7%) were performed for additional incision and drainage. Readmissions rate was 3.0%, with median time to readmission of 10.5 days. Common indications for readmissions included recurrent/persistent abscess (41.4%) and fever/sepsis (8.6%). Risk factors for hospitalization in multivariable analysis were preoperative sepsis, bleeding disorder, and non-Hispanic black and Hispanic races. For reoperations, risk factors included morbid obesity, preoperative sepsis, and dependent functional status. Lastly, for readmissions, female sex, steroid/immunosuppression, and dependent functional status were significant risk factors.

LIMITATIONS

The study was limited by its retrospective analysis and potential selection bias in decisions on hospital stay, reoperation, and readmission.

CONCLUSIONS

Suboptimal outcomes after outpatient operative incision and drainage for perirectal abscesses are not uncommon in the United States. In the era of value-based care, additional work is needed to optimize use outcomes for high-risk patients undergoing perirectal incision and drainage. Strategies to prevent inadequate drainage at the time of the initial operative incision and drainage (ie, use of imaging modalities and thorough examination under anesthesia) are warranted to improve patient outcomes. See Video Abstract at http://links.lww.com/DCR/B229. INCISIÓN Y DRENAJE QUIRÚRGICOS DE ABSCESOS PERIRRECTALES: CUALES SON LOS FACTORES DE RIESGO PARA UNA ESTADÍA PROLONGADA, REINTERVENCIÓN Y READMISION?: Los abscesos perirrectales son un problema frecuente. A pesar que parecen ser una afección aparentemente simple de manejar, los resultados clínicos de la incisión y drenaje quirúrgicos pueden variar significativamente dada la amplia variedad de pacientes susceptibles de sufrir esta afección.Evaluar los resultados después de la incisión y el drenaje quirúrgicos de un absceso perirrectal y analizar los factores asociados con la duración de la hospitalización, la reoperación y la readmisión.Análisis retrospectivo de la base de datos del Programa Americano de Mejora de la Calidad Quirúrgica.Hospitales que participan en la base de datos quirúrgica.Pacientes adultos sometidos a incisión y drenaje quirúrgico ambulatorio de un absceso perirrectal desde 2011 hasta 2016.Los resultados del estudio fueron la duración de la hospitalización, la reoperación y el reingreso.Fueron estudiados 2,358 pacientes sometidos a incisión y drenaje por abscesos perirrectales. Aproximadamente el 35% de los pacientes requirieron hospitalización. Las reoperaciones ocurrieron en 3.4% con una mediana de tiempo de reoperación de 15.5 días. La mayoría de las reoperaciones (79.7%) se realizaron para una incisión y drenaje adicionales. La tasa de reingreso fue del 3.0% con una mediana de tiempo de reingreso de 10.5 días. Las indicaciones comunes para los reingresos incluyeron abscesos recurrentes / persistentes (41.4%) y fiebre / sepsis (8.6%). Los factores de riesgo para la hospitalización en el análisis multivariable fueron sepsis preoperatoria, trastorno hemorrágico, raza negra no hispánica y raza hispana. Para las reoperaciones, los factores de riesgo incluyeron obesidad mórbida, sepsis preoperatoria y estado funcional dependiente. Por último, para los reingresos, el sexo femenino, uso de corticoides / inmunosupresores y un estadío funcional dependiente fueron factores de riesgo significativos.Análisis retrospectivo y posible sesgo de selección en las decisiones sobre hospitalización, reoperación y reingreso.Un resultado poco satisfactorio después de la incisión quirúrgica el drenaje de abscesos perirrectales ambulatoriamente no son infrecuentes en los Estados Unidos. En la era de la atención basada en los resultados, se necesita mucho más trabajo para optimizar los mismos en pacientes de alto riesgo sometidos a incisión y drenaje perirrectales. Las estrategias para prevenir el drenaje inadecuado en el momento de la incisión quirúrgica inicial y el drenaje (es decir, el uso de modalidades de imágenes, un examen completo bajo anestesia) son una garantía para mejorar los resultados en estos pacientes. Consulte Video Resumen en http://links.lww.com/DCR/B229.

Nephrology Provider Surprise Question Response and Hospitalizations in Older Adults with Advanced CKD

BACKGROUND

Older adults with advanced non-dialysis-dependent chronic kidney disease (NDD-CKD) face a high risk of hospitalization and related adverse events.

METHODS

This prospective cohort study followed nephrology clinic patients ≥60 years old with NDD-CKD stages 4-5. After an eligible patient's office visit, study staff asked the patient's provider to rate the patient's risk of death within the next year using the surprise question ("Would you be surprised if this patient died in the next 12 months?") with a 5-point Likert scale response (1, "definitely not surprised" to 5, "very surprised"). We used a statewide database to ascertain hospitalization during follow-up.

RESULTS

There were 488 patients (median age 72 years, 51% female, 17% black) with median estimated glomerular filtration rate 22 mL/min/1.73 m2. Over a median follow-up of 2.1 years, the rates of hospitalization per 100 person-years in the respective response groups were 41 (95% confidence interval [CI]: 34-50), "very surprised"; 65 (95% CI: 55-76), "surprised"; 98 (95% CI: 85-113), "neutral"; 125 (95% CI: 107-144), "not surprised"; and 120 (95% CI: 94-151), "definitely not surprised." In a fully adjusted cumulative probability ordinal regression model for proportion of follow-up time spent hospitalized, patients whose providers indicated that they would be "definitely not surprised" if they died spent a greater proportion of follow-up time hospitalized compared with those whose providers indicated that they would be "very surprised" (odds ratio 2.4, 95% CI: 1.0-5.7). There was a similar association for time to first hospitalization.

CONCLUSION

Nephrology providers' responses to the surprise question for older patients with advanced NDD-CKD were independently associated with proportion of future time spent hospitalized and time to first hospitalization. Additional studies should examine how to use this information to provide patients with anticipatory guidance on their possible clinical trajectory and to target potentially preventable hospitalizations.

The association of neighborhood racial mix and ED visit count in a cohort of patients on hemodialysis

Background

Neighborhood racial mix is associated with dialysis facility performance metrics and mortality outcomes in patients on hemodialysis. We explored the association of neighborhood racial mix with emergency department (ED) visits in patients receiving hemodialysis.

Methods

Using Looking Glass (Montefiore’s clinical database) we identified a cohort of patients on hemodialysis with an index ED visit at any of 4 Montefiore Hospital locations, between January 2013 and December 2017 and followed it for number of ED visits through December of 2017 or dropout due to death. The racial mix data for the Bronx block group of each subject’s residence was derived from the Census Bureau. We then used negative binomial regression to test the association of quintile of percent of Black residents per residential block group with ED visits in unadjusted and adjusted models. To adjust further for quality offered by local dialysis facilities, with the facility zip code as the locus, we used data from the “Dialysis Compare” website.

Results

Three thousand nine-hundred and eighteen subjects were identified and the median number of ED visits was 3 (interquartile range (IQR) 1–7) during the study period. Subjects living in the highest quintile of percent Black residents were older, more commonly female and had lower poverty rates and higher rates of high school diplomas. Unadjusted models showed a significant association between the highest quintiles of Black neighborhood residence and count of ED visits. Fully adjusted, stratified models revealed that among males, and Hispanic and White subjects, living in neighborhoods with the highest quintiles of Black residents was associated with significantly more ED visits (p-trend =0.001, 0.02, 0.01 respectively). No association was found between dialysis facility locations’ quintile of Black residents and quality metrics.

Conclusions

Living in a neighborhood with a higher percentage of Black residents is associated with a higher number of ED visits in males and non-Black patients on hemodialysis.

Electronic supplementary material

The online version of this article (10.1186/s12882-019-1520-x) contains supplementary material, which is available to authorized users.

Urinary tract infection-related hospitalization among older adults receiving home health care

BACKGROUND

Urinary tract infection (UTI)- related hospitalizations are a poor patient outcome in the rapidly growing home health care (HHC) arena that serves a predominantly elderly population. We examined the association between activities of daily living (ADL) and risk of UTI-related hospitalization among this population.

METHODS

Using a retrospective cohort design, we conducted a secondary data analysis of a 5% random sample of a national HHC dataset, the Outcome and Assessment Information Set for the year 2013. Andersen's Behavioral Model of Health Service Utilization was used as a guiding framework for statistical modeling. We used logistic regression to examine the association between UTI-related hospitalization and predisposing, enabling, or need factors.

RESULTS

Among beneficiaries (n = 24,887) hospitalized in 2013, 1,133 had UTI-related hospitalizations. HHC patients with a UTI-related hospitalization were more likely to have severe ADL dependency, impaired decision making, and lower Charlson Comorbidity Index, than those with a non UTI-related hospitalization (P < .001). Risk factors for UTI-related hospitalization included female sex, (adjusted odds ratio [AOR], 1.44; 95% confidence interval [CI], 1.25-1.66), Medicaid recipient (AOR, 1.99; 95% CI, 1.09-3.64), severe ADL dependency (AOR, 1.50; 95% CI, 1.16-1.94), the presence of a caregiver to assist with supervision and safety (AOR, 1.26; 95% CI, 1.06-1.49), treatment for UTI in the previous 14 days (AOR, 2.85; 95% CI, 2.46-3.29), presence of a urinary catheter (AOR, 3.77; 95% CI, 2.98-4.77), and prior history of indwelling or suprapubic catheter (AOR, 1.44; 95% CI, 1.06-1.94).

CONCLUSIONS

ADL dependency levels are a potentially modifiable risk factor for UTI-related hospitalization on admission to HHC. ADL dependency levels can inform clinical interventions to ameliorate ADL dependency in HHC settings and identify groups of patients at high risk for UTI-related hospitalization.

Inequalities and outcomes: end stage kidney disease in ethnic minorities

Background

The international evidence about outcomes of End Stage Kidney Disease (ESKD) for ethnic minorities was reviewed to identify gaps and make recommendations for researchers and policy makers.

Methods

Nine databases were searched systematically with 112 studies from 14 different countries included and analysed to produce a thematic map of the literature.

Results

Reviews (n = 26) highlighted different mortality rates and specific causes between ethnic groups and by stage of kidney disease associated with individual, genetic, social and environmental factors. Primary studies focussing on uptake of treatment modalities (n = 19) found ethnic differences in access. Research evaluating intermediate outcomes and quality of care in different treatment phases (n = 35) e.g. dialysis adequacy, transplant evaluation and immunosuppression showed ethnic minorities were disadvantaged. This is despite a survival paradox for some ethnic minorities on dialysis seen in studies of longer term outcomes (n = 29) e.g. in survival time post-transplant and mortality. There were few studies which focussed on end of life care (n = 3) and ethnicity.

Gaps identified were: limited evidence from all stages of the ESKD pathway, particularly end of life care; a lack of system oriented studies with a reliance on national routine datasets which are limited in scope; a dearth of qualitative studies; and a lack studies from many countries with limited cross country comparison and learning.

Conclusions

Differences between ethnic groups occur at various points and in a variety of outcomes throughout the kidney care system. The combination of individual factors and system related variables affect ethnic groups differently indicating a need for culturally intelligent policy informed by research to prevent disadvantage.

Avoidable visits to the emergency department(ED) and their association with sex, age and race in a cohort of low socio-economic status patients on hemodialysis in the Bronx

Background

In national samples drawn from the USRDS, female patients utilize the hospital ED and inpatient services at a higher rate than their male counterparts and have a higher rate of re-hospitalization. We wanted to explore the association of sex with avoidable ED visits made by a cohort of patients on hemodialysis in a mostly minority, lower socioeconomic status (SES), population in the Bronx to test the applicability of the USRDS findings.

Methods

We used Montefiore’s clinical database to build a cohort of patients on hemodialysis with a first ED visit between 2013 and 2017. All ED visits after the index ED visit and those within one year prior to the index visit were recorded. None of the ED visits resulted in a hospitalization and were thus labeled “avoidable”. Bivariate analysis tested the association of demographic and clinical variables with sex. We used negative binomial regression to test the association of each variable with avoidable ED visit count. The multivariate model used negative binomial regression with avoidable ED visit count as outcome and sex as the exposure variable and included ancestral variables age and race. Potential mediators were added to the model to measure their effects on the association of sex with avoidable ED visits.

Results

Four thousand six hundred and seventy three subjects on hemodialysis were identified as having at least one avoidable ED visit, in the period of 2013–2017 at one of four ED sites affiliated with Montefiore Medical Center in the Bronx. Over 5 years (2012–2017), the median number of ED visits made by the study sample was 4 (25–75% IQR: 2–8). Female patients on hemodialysis in our cohort were older, more commonly black, had lower SES scores, less commonly had commercial insurance and were less commonly married than their male counterparts. Female sex was not significantly associated with a higher rate of avoidable ED visits in the total cohort.(1.053(0.99–1.12) Female sex was significantly associated with outcome in non-Hispanic whites only and in those subjects younger than 44 years old.(IRR 1.30(1.06–1.69), 1.17(1.00–1.38) in non-Hispanic White and younger age group, respectively.) Marital status, SES and hemoglobin levels possibly mediated the association of sex and outcome in our population. (>25% change in the coefficient for sex with respect to outcome when variable added to the model).

Conclusion

In this single center study of a lower-socioeconomic status, mostly minority dialysis population, the association of female sex with avoidable ED visits was not significant. These results suggest the association of sex with hospitalization outcomes, described by national datasets that determine quality indicators, are not consistent across different types of populations with some mediation possible by SES and marital status in poorer neighborhoods.

National Trends in Emergency Room Visits of Dialysis Patients for Adverse Drug Reactions

BACKGROUND

Various medications are cleared by the kidneys, therefore patients with impaired renal function, especially dialysis patients are at risk for adverse drug events (ADEs). There are limited studies on ADEs in maintenance dialysis patients.

METHODS

We utilized a nationally representative database, the Nationwide Emergency Department Sample, from 2008 to 2013, to compare emergency department (ED) visits for dialysis and propensity matched non-dialysis patients. Log binomial regression was used to calculate relative risk of hospital admission and logistic regression to calculate ORs for in-hospital mortality while adjusting for patient and hospital characteristics.

RESULTS

While ED visits for ADEs decreased in both groups, they were over 10-fold higher in dialysis patients than non-dialysis patients (65.8-88.5 per 1,000 patients vs. 4.6-5.4 per 1,000 patients respectively, p < 0.001). The top medication category associated with ED visits for ADEs in dialysis patients is agents primarily affecting blood constituents, which has increased. After propensity matching, patient admission was higher in dialysis patients than non-dialysis patients, (88 vs. 76%, p < 0.001). Dialysis was associated with a 3% increase in risk of admission and 3 times the odds of in-hospital mortality (adjusted OR 3, 95% CI 2.7-2.3.3).

CONCLUSIONS

ED visits for ADEs are substantially higher in dialysis patients than non-dialysis patients. In dialysis patients, ADEs associated with agents primarily affecting blood constituents are on the rise. ED visits for ADEs in dialysis patients have higher inpatient admissions and in-hospital mortality. Further studies are needed to identify and implement measures aimed at reducing ADEs in dialysis patients.

Sex and gender disparities in the epidemiology and outcomes of chronic kidney disease

Improved understanding of sex and gender-specific differences in the aetiology, mechanisms and epidemiology of chronic kidney disease (CKD) could help nephrologists better address the needs of their patients. Population-based studies indicate that CKD epidemiology differs by sex, affecting more women than men, especially with regard to stage G3 CKD. The effects of longer life expectancy on the natural decline of glomerular filtration rate (GFR) with age, as well as potential overdiagnosis of CKD through the inappropriate use of GFR equations, might be in part responsible for the greater prevalence of CKD in women. Somewhat paradoxically, there seems to be a preponderance of men among patients starting renal replacement therapy (RRT); the protective effects of oestrogens in women and/or the damaging effects of testosterone, together with unhealthier lifestyles, might cause kidney function to decline faster in men than in women. Additionally, elderly women seem to be more inclined to choose conservative care instead of RRT. Dissimilarities between the sexes are also apparent in the outcomes of CKD. In patients with predialysis CKD, mortality is higher in men than women; however, this difference disappears for patients on RRT. Although access to living donor kidneys among men and women seems equal, women have reduced access to deceased donor transplantation. Lastly, health-related quality of life while on RRT is poorer in women than men, and women report a higher burden of symptoms. These findings provide insights into differences in the underlying pathophysiology of disease as well as societal factors that can be addressed to reduce disparities in access to care and outcomes for patients with CKD.

Sex and gender disparities in the epidemiology and outcomes of chronic kidney disease

Improved understanding of sex and gender-specific differences in the aetiology, mechanisms and epidemiology of chronic kidney disease (CKD) could help nephrologists better address the needs of their patients. Population-based studies indicate that CKD epidemiology differs by sex, affecting more women than men, especially with regard to stage G3 CKD. The effects of longer life expectancy on the natural decline of glomerular filtration rate (GFR) with age, as well as potential overdiagnosis of CKD through the inappropriate use of GFR equations, might be in part responsible for the greater prevalence of CKD in women. Somewhat paradoxically, there seems to be a preponderance of men among patients starting renal replacement therapy (RRT); the protective effects of oestrogens in women and/or the damaging effects of testosterone, together with unhealthier lifestyles, might cause kidney function to decline faster in men than in women. Additionally, elderly women seem to be more inclined to choose conservative care instead of RRT. Dissimilarities between the sexes are also apparent in the outcomes of CKD. In patients with predialysis CKD, mortality is higher in men than women; however, this difference disappears for patients on RRT. Although access to living donor kidneys among men and women seems equal, women have reduced access to deceased donor transplantation. Lastly, health-related quality of life while on RRT is poorer in women than men, and women report a higher burden of symptoms. These findings provide insights into differences in the underlying pathophysiology of disease as well as societal factors that can be addressed to reduce disparities in access to care and outcomes for patients with CKD.

Intensive procedure preferences at the end of life (EOL) in older Latino adults with end stage renal disease (ESRD) on dialysis

Background

Latinos in the U.S. are almost twice as likely to progress to End Stage Renal disease (ESRD) compared to non-Latino whites. Patients with ESRD on dialysis experience high morbidity, pre-mature mortality and receive intensive procedures at the end of life (EOL). This study explores intensive procedure preferences at the EOL in older Latino adults.

Methods

Seventy-three community-dwelling Spanish- and English-Speaking Latinos over the age of 60 with and without ESRD participated in this study. Those without ESRD (n = 47) participated in one of five focus group sessions, and those with ESRD on dialysis (n = 26) participated in one-on-one semi-structured interviews. Focus group and individual participants answered questions regarding intensive procedures at the EOL. Recurring themes were identified using standard qualitative content-analysis methods. Participants also completed a brief survey that included demographics, language preference, health insurance coverage, co-morbidities, Emergency Department visits and functional limitations.

Results

The majority of participants were of Mexican origin with mean age of 70, and there were more female participants in the non-ESRD group, compared to the ESRD dialysis dependent group. The dialysis group reported a higher number of co-morbidities and functional limitations. Nearly 69% of those in the dialysis group reported one or more emergency department visits in the past year, compared to 38% in the non-ESRD group. Primary themes centered on 1) The acceptability of a “natural” versus “invasive” procedure 2) Cultural traditions and family involvement 3) Level of trust in physicians and autonomy in decision-making.

Conclusion

Our results highlight the need for improved patient- and family-centered approaches to better understand intensive procedure preferences at the EOL in this underserved population of older adults.

Sex Differences in Hospitalizations with Maintenance Hemodialysis

Hospitalization is a major source of morbidity among patients with ESRD undergoing maintenance hemodialysis and is a significant contributor to health care costs. To identify subgroups at the highest risk of hospitalization, we analyzed by sex, age, and race, adjusting for demographic and clinical characteristics, the hospitalization rates, and 30-day readmissions for 333,756 hospitalizations among 111,653 patients undergoing maintenance hemodialysis in facilities operated by a large dialysis organization in the United States (2007-2011). The overall hospitalization rate was 1.85 hospitalizations per person-year and was much higher among women than among men (2.08 versus 1.68 hospitalizations per year for women versus men, P<0.001). Age group-specific hospitalization rates were consistently higher for women than for men of the same race, and the differences were greatest in younger age groups (for example, women aged 18-34 years and ≥75 years had 54% [95% confidence interval, 42% to 67%] and 14% [95% confidence interval, 11% to 18%] higher hospitalization rates, respectively, than did men of respective ages). Women also had substantially higher risk for 30-day readmission, with the largest differences at younger ages. Women had a significantly lower serum albumin level than men, and stratification by serum albumin level attenuated sex differences in the age group-specific hospitalization and 30-day readmission rates. These findings suggest that women undergoing maintenance hemodialysis have substantially higher risks for hospitalization and 30-day readmission than men. In this cohort, the sex differences were greatest in the younger age groups and were attenuated by accounting for differences in health status reflected by serum albumin level.

Racial/Ethnic Differences in the Association Between Hospitalization and Kidney Transplantation Among Waitlisted End-Stage Renal Disease Patients

BACKGROUND

Even after placement on the deceased donor waitlist, there are racial disparities in access to kidney transplant. The association between hospitalization, a proxy for health while waitlisted, and disparities in kidney transplant has not been investigated.

METHODS

We used United States Renal Data System Medicare-linked data on waitlisted end-stage renal disease patients between 2005 and 2009 with continuous enrollment in Medicare Parts A & B (n = 24 581) to examine the association between annual hospitalization rate and odds of receiving a deceased donor kidney transplant. We used multilevel mixed effects models to estimate adjusted odds ratios, controlling for individual-, transplant center-, and organ procurement organization-level clustering.

RESULTS

Blacks and Hispanics were more likely than whites to be hospitalized for circulatory system or endocrine, nutritional, and metabolic diseases (P < 0.001). After adjustment, compared with individuals not hospitalized, patients who were hospitalized frequently while waitlisted were less likely to be transplanted (>2 vs 0 hospitalizations/year adjusted odds ratios = 0.57; P < 0.001). Though blacks and Hispanics were more likely to be hospitalized than whites (P < 0.001), adjusting for hospitalization did not change estimated racial/ethnic disparities in kidney transplantation.

CONCLUSIONS

Individuals hospitalized while waitlisted were less likely to receive a transplant. However, hospitalization does not account for the racial disparity in kidney transplantation after waitlisting.

Re-evaluation of re-hospitalization and rehabilitation in renal research

INTRODUCTION

The use of administrative data to capture 30-day readmission rates in end-stage renal disease is challenging since Medicare combines claims from acute care, inpatient rehabilitation (IRF), and long-term care hospital stays into a single "Inpatient" file. For data prior to 2012, the United States Renal Data System does not contain the variables necessary to easily identify different facility types, making it likely that prior studies have inaccurately estimated 30-day readmission rates.

METHODS

For this report, we developed two methods (a "simple method" and a "rehabilitation-adjusted method") to identify acute care, IRF, and long-term care hospital stays from United States Renal Data System claims data, and compared them to methods used in previously published reports.

FINDINGS

We found that prior methods overestimated 30-day readmission rates by up to 12.3% and overestimated average 30-day readmission costs by up to 11%. In contrast, the simple and rehabilitation-adjusted methods overestimated 30-day readmission rates by 0.1% and average 30-day readmission costs by 1.8%. The rehabilitation-adjusted method also accurately identified 96.8% of IRF stays.

DISCUSSION

Prior research has likely provided inaccurate estimates of 30-day readmissions in patients undergoing dialysis. In the absence of data on specific facility types particularly when using data prior to 2012, future researchers could employ our method to more accurately characterize 30-day readmission rates and associated outcomes in patients with end-stage renal disease.

An Update on Inpatient Hypertension Management

Hypertension is highly prevalent affecting nearly one third of the US adult population. Though generally approached as an outpatient disorder, elevated blood pressure is observed in a majority of hospitalized patients. The spectrum of hypertensive disease ranges from patients with hypertensive emergency including markedly elevated blood pressure and associated end-organ damage to asymptomatic patients with minimally elevated pressures of unclear significance. It is important to note that current evidence-based hypertension guidelines do not specifically address inpatient hypertension. This narrative review focuses primarily on best practices for diagnosing and managing nonemergent hypertension in the inpatient setting. We describe examples of common hypertensive syndromes, provide suggestions for optimal post-acute management, and point to evidence-based or consensus guidelines where available. In addition, we describe a practical approach to managing asymptomatic elevated blood pressure observed in the inpatient setting. Finally, arranging effective care transitions to ensure optimal ongoing hypertension management is appropriate in all cases.

Interstate Variation in Receipt of Nephrologist Care in US Patients Approaching ESRD: Race, Age, and State Characteristics

BACKGROUND AND OBJECTIVES

Although multiple factors influence access to nephrologist care in patients with CKD stages 4-5, the geographic determinants within the United States are incompletely understood. In this study, we examined interstate differences in nephrologist care among patients approaching ESRD.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

This national, population-based analysis included 373,986 adult patients from the US Renal Data System, who initiated maintenance dialysis between 2005 and 2009. Multilevel logistic regression was used to examine interstate variation in nephrologist care (≥12 months before ESRD) for overall and four race-age subpopulations (black or white and older or younger than 65 years).

RESULTS

The average state-level probability of having received nephrologist care in all states combined was 28.8% (95% confidence interval, 25.2% to 32.7%) overall and was lowest (24.3%) in the younger black subpopulation. Even at these lower levels, state-level probabilities varied considerably across states in overall and subpopulations (all P<0.001). Overall, excluding the states in the upper and lower five percentiles, the remaining states had a probability of receiving care that varied from 18.5% to 41.9%. The lower probability of receiving nephrologist care for blacks than whites among younger patients noted in most states was attenuated in older patients. Geographically, all New England states and most Midwest states had higher than average probability, whereas most Middle Atlantic and Southern states had lower than average probability. After controlling for patient factors, three state-characteristic categories, including general healthcare access measured by percentage of uninsured persons and Medicaid program performance scores, preventive care measured by percentage of receiving recommended preventive care, and socioeconomic status, contributed 55%-66% of interstate variation.

CONCLUSIONS

Patients living in states with better health service and socioeconomic characteristics were more likely to receive predialysis nephrologist care. The reported national black-white difference in nephrologist care was primarily driven by younger black patients being the least likely to receive care.