Association of Race and Ethnicity With Live Donor Kidney Transplantation in the United States From 1995 to 2014

Artificial intelligence assisted risk prediction in organ transplantation: a UK Live-Donor Kidney Transplant Outcome Prediction tool

Introduction: Predicting the outcome of a kidney transplant involving a living donor advances donor decision-making donors for clinicians and patients. However, the discriminative or calibration capacity of the currently employed models are limited. We set out to apply artificial intelligence (AI) algorithms to create a highly predictive risk stratification indicator, applicable to the UK's transplant selection process.

Methodology: Pre-transplant characteristics from 12,661 live-donor kidney transplants (performed between 2007 and 2022) from the United Kingdom Transplant Registry database were analyzed. The transplants were randomly divided into training (70%) and validation (30%) sets. Death-censored graft survival was the primary performance indicator. We experimented with four machine learning (ML) models assessed for calibration and discrimination [integrated Brier score (IBS) and Harrell's concordance index]. We assessed the potential clinical utility using decision curve analysis.

Results: XGBoost demonstrated the best discriminative performance for survival (area under the curve = 0.73, 0.74, and 0.75 at 3, 7, and 10 years post-transplant, respectively). The concordance index was 0.72. The calibration process was adequate, as evidenced by the IBS score of 0.09.

Conclusion: By evaluating possible donor-recipient pairs based on graft survival, the AI-based UK Live-Donor Kidney Transplant Outcome Prediction has the potential to enhance choices for the best live-donor selection. This methodology may improve the outcomes of kidney paired exchange schemes. In general terms we show how the new AI and ML tools can have a role in developing effective and equitable healthcare.

Living donor transplant: Right vs left kidney

Khan et al’ single-centre, retrospective study on the use of right or left kidneys in living-donor renal transplantation, offers the opportunity to further discuss a complex and debated topic in clinical transplantation. In brief, the authors confirm that, despite the historical preference for left kidneys, attributed to their anatomical advantages during donor nephrectomy and recipient transplantation, right kidneys can provide excellent outcomes when donors and recipients are carefully selected, and a meticulous surgical technique is applied in every step of the process. Usefully, the article includes some practical tips to help less experienced surgeons address the technical challenges of right kidney transplantation, such as extended renal vein dissection or full mobilization of the iliac vein of the recipient to minimize tension during anastomosis. Although limited by the selective use of minimally invasive (MI) nephrectomy for left kidneys, this work underscores the importance of expanding the living-donor pool, challenging the traditional taboos, and facilitating access to transplantation for a wider population of patients around the globe. Properly designed studies with larger sample size, comparable MI surgical techniques, prospective data collection, and long-term donor and recipient outcomes are warranted.

System Interventions to Achieve Early and Equitable Kidney Transplants (STEPS): Protocol for STEPS, a randomized comparative effectiveness clinical trial

The System Interventions to Achieve Early and Equitable Kidney Transplants Study (STEPS) is an ongoing pragmatic clinical trial investigating the effectiveness of an equitable and patient-centered approach to kidney care on equitable access to early kidney transplants for individuals with chronic kidney disease not on dialysis. The STEPS intervention combines active electronic health record surveillance to equitably identify all potentially eligible kidney transplant candidates in three health systems ('STEPS Surveillance') with a 'STEPS Outreach Program' (comprised of equity-conscious patient-centered transplant social worker and transplant coordinator outreach and navigation activities). Identified eligible participants are randomly assigned to receive either (a) Augmented Usual Kidney Care (routine care plus electronic surveillance and best practice alerts), or (b) the STEPS Health System Surveillance and Outreach Intervention plus Augmented Usual Kidney Care to improve access to kidney transplants overall as well as among Black and rural residing individuals. STEPS recruited all planned 1168 participants from March 2022 to March 2024. Outcomes will quantify differences between the study arms in progress toward and completion of kidney transplant evaluations, assessed via medical records, and patient-reported outcomes. Registration of clinical trials This study is registered at ClinicalTrials.gov under the identifier NCT05014256.

Effect of Race on Transplantation in Autosomal Dominant Polycystic Kidney Disease

Key Points

Despite overall superior outcomes, transplant outcomes of patients with autosomal dominant polycystic kidney disease are heavily influenced by race. Access to living donor and preemptive transplantation partly explains these racial disparities. Favorable Expected Post-Transplant Survival scores suggest that promoting equity would result in improved survival for patients with ADPKD.

Background

Autosomal dominant polycystic kidney disease (ADPKD) is the most common genetic cause of ESKD and occurs without racial predilection. In general, non-White patients with ESKD have less access to transplantation, especially living donor transplantation. We examined long-term outcomes of patients with ADPKD-ESKD by self-reported race, with attention to the trajectory of Estimated Post-Transplant Survival (EPTS) scores over time.

Methods

United Network for Organ Sharing Standard Transplant Analysis and Research files were used to identify 32,611 ADPKD transplant recipients between January 2000 and December 2022. EPTS scores were calculated from the date of waitlisting until transplantation occurred. Cumulative incidences of living and deceased transplantation were calculated and plotted. Cox models were made for graft failure and death, and a subdistribution hazards model for graft failure accounted for death as a competing outcome, with adjustment for patient, donor, and transplant factors.

Results

Compared with White patients with ADPKD, all other groups had more dialysis years, more delayed graft function, and fewer living and preemptive transplants; mean EPTS scores were lower in Black and Hispanic patients at each time point on the waitlist. However, EPTS scores at the time of transplant was less likely to be <20% in Black and Hispanic patients because of longer waiting time. Black patients had a significantly higher risk of graft failure with death as competing risk compared with White patients. Asian and Hispanic patients had similar graft survivals but better patient survival compared with White patients.

Conclusions

Waitlist experience, allograft quality, and post-transplant outcomes of patients with ADPKD are influenced by patient race.

Global perspectives on transplant disparities

PURPOSE OF REVIEW

Our goal was to review and summarize the current state of global disease burden from organ failure and the efforts to improve outcomes with organ transplantation. We also reviewed intra- and inter-country disparities in organ failure and organ transplantation along with potential mechanisms to improve access to organ transplantation globally.

RECENT FINDINGS

Many disparities and inequities observed globally can be characterized by the country's income category. Low- and lower-middle income countries (LLMICs) have higher rates of communicable disease-attributed organ failure, while upper-income countries (UICs) have high overall prevalence due to global growth in noncommunicable etiologies of organ failure. Many downstream disparities in access to organ transplantation and outcomes are associated with country income designation. Improvements in data collection and surveillance of populations with organ failure and organ transplantation are urgently needed.

SUMMARY

Improving outcomes for patients with end-organ disease globally will require countries to improve organ transplantation access and care. For LLMICs, collaboration with international transplant systems and engagement with neighboring countries may establish important foundations for organ transplant systems. For UICs, increasing organ donor availability through technological advances and increasing public engagement will help meet the growing needs for organ transplantation as an important treatment modality.

Hispanic survival paradox: a systematic review of short-term hospital readmissions among Hispanic kidney transplant recipients in the United States

PURPOSE OF REVIEW

The epidemiologic phenomenon known as the "Hispanic paradox" postulates that Hispanic/Latino Americans generally tend to live longer than other racial/ethnic communities, despite facing many socioeconomic disadvantages and other healthcare barriers. Whether this phenomenon is relevant among kidney transplantation (KT) recipients remains unclear. To investigate the possibility of a Hispanic mortality advantage, we conducted a systematic review of the published literature comparing short-term KT outcomes (first 12-months) for US Hispanic versus non-Hispanic White KT recipients.

RECENT FINDINGS

This systematic review summarizes recent findings from sixteen observational retrospective cohort studies that met our study criteria. Study sample sizes ranged from 42 to 244 037 total KT recipients and examined data between 2005 and 2022. Compared to their Non-Hispanic comparator, the Hispanic sub-samples were more likely to be younger, spend more time on dialysis, and less likely to receive preemptive transplant or living donation. Hispanic KT recipients experienced similar or more favorable outcomes in eleven studies (ten studies examining patient and graft survival, one study examining readmissions), but only three studies with statistical significance.

SUMMARY

As the US Hispanic and Latino population continues to grow into the diverse American melting pot, this review highlights the need for better approaches to studying racial and ethnic variables within kidney transplantation.

Effect of Physical Function on Access to Repeat Kidney Transplantation

Background: The long-term success rate of kidney transplantation is disappointing, with repeat transplantation necessary for more than half of recipients. When a repeat kidney transplantation is needed, patients are often elderly and suffer from underlying advanced kidney disease, comorbidities, and adverse effects of immunosuppressants, leading to physical function limitations. Limited physical function is known to hinder access to an initial kidney transplantation, but there is no information about its impact on repeat transplantations. Objective: This study aimed to determine the effect of physical function on access to wait-listing for repeat transplantation. Methods: Data from the national registry was utilized to analyze 28,884 kidney transplant recipients. Physical function was assessed with Karnofsky scores, and patients were categorized into three strata: total assistance, some assistance, and no assistance. Logistic regression and multivariate Cox proportional hazard models were used to assess the impact of physical function on waiting list access and duration until wait-listing, respectively. Results: Patients with greater physical independence were more likely to be wait-listed for repeat kidney transplantation. Highly sensitized patients, those with diabetes, Black patients, and elderly individuals had a lower likelihood of access to wait-listing after kidney failure. Interestingly, those with limited physical function, provided they remained in the work-up process, experienced a relatively shorter duration to wait-listing after graft failure.Conclusions: These findings highlight the need to promote and support physical function throughout the kidney transplant journey to improve access to repeat transplantation and subsequent patient outcomes.

Kidney Transplant Wait Times Under Waiting List Expansion Scenarios

Importance

Kidney transplantation offers survival benefits and superior quality of life compared with maintenance dialysis for patients with end-stage kidney disease (ESKD), but it is limited to approximately 25 000 patients annually in the United States. Expanding access to transplant could be accomplished by allowing more patients to join the waiting list or by increasing organ supply.

Objective

To estimate how these interventions could affect transplant wait times.

Design, Setting, and Participants

This decision-analytic study used a Markov model with a simulated cohort of transplant-eligible US patients over 10 years (2022-2032).

Exposures

Three expansion strategies: waiting list expansion alone, waiting list expansion with deceased-donor transplant (DDT) expansion, and waiting list expansion with living-donor transplant (LDT) expansion. Relative 10%, 25%, 50%, and 100% expansions of the current deceased-donor organ supply and 25%, 50%, 100%, and 200% expansions of current living donation rates were simulated, modeling 2 degrees of waiting list expansion (10% and 50%) for each strategy.

Main Outcomes and Measures

Median wait time to kidney transplant using Kaplan-Meier survival analysis.

Results

There were a total of 662 190 transplant-eligible patients in the simulated cohort, with a mean (SD) age of 58.7 (14.7) years; 327 126 (49%) female individuals; and 269 082 (41%) Black, 163 028 (25%) Hispanic, 233 739 (35%) non-Hispanic White, and 78 496 (12%) Asian individuals and individuals with another race or ethnicity. Under the baseline strategy, median (IQR) wait time was 32.8 (13.1-66.4) months and increased to 36.8 (14.7-74.7) months and 52.6 (21.0-107.9) months for 10% and 50% waiting list expansion alone. DDT and LDT expansion strategies added 1911 to 20 035 organs. For 10% waiting list expansion, median (IQR) wait times ranged from 23.7 (9.3-47.8) months to 34.5 (13.9-74.7) months. For 50% waiting list expansion, median (IQR) wait times ranged from 34.2 (13.6-69.4) months to 49.4 (19.7-101.0) months.

Conclusions and Relevance

In this decision-analytic model, expansion strategies without additional organ supply increased the median time to kidney transplant by nearly 2 years; 10% waiting list expansion required at least 2850 additional organs to shorten wait times. However, 50% waiting list expansion required at least 11 000 additional organs to approximate current wait times. Reduction in the deceased-donor organ nonuse rate alone is unlikely to meet the shortfall. Systems-level efforts to significantly increase deceased and living donation should be prioritized alongside increased access to the transplant waiting list.

Investigating the Classification of Living Kidney Donation Experiences on Reddit and Understanding the Sensitivity of ChatGPT to Prompt Engineering: Content Analysis

BACKGROUND

Living kidney donation (LKD), where individuals donate one kidney while alive, plays a critical role in increasing the number of kidneys available for those experiencing kidney failure. Previous studies show that many generous people are interested in becoming living donors; however, a huge gap exists between the number of patients on the waiting list and the number of living donors yearly.

OBJECTIVE

To bridge this gap, we aimed to investigate how to identify potential living donors from discussions on public social media forums so that educational interventions could later be directed to them.

METHODS

Using Reddit forums as an example, this study described the classification of Reddit content shared about LKD into three classes: (1) present (presently dealing with LKD personally), (2) past (dealt with LKD personally in the past), and (3) other (LKD general comments). An evaluation was conducted comparing a fine-tuned distilled version of the Bidirectional Encoder Representations from Transformers (BERT) model with inference using GPT-3.5 (ChatGPT). To systematically evaluate ChatGPT's sensitivity to distinguishing between the 3 prompt categories, we used a comprehensive prompt engineering strategy encompassing a full factorial analysis in 48 runs. A novel prompt engineering approach, dialogue until classification consensus, was introduced to simulate a deliberation between 2 domain experts until a consensus on classification was achieved.

RESULTS

BERT and GPT-3.5 exhibited classification accuracies of approximately 75% and 78%, respectively. Recognizing the inherent ambiguity between classes, a post hoc analysis of incorrect predictions revealed sensible reasoning and acceptable errors in the predictive models. Considering these acceptable mismatched predictions, the accuracy improved to 89.3% for BERT and 90.7% for GPT-3.5.

CONCLUSIONS

Large language models, such as GPT-3.5, are highly capable of detecting and categorizing LKD-targeted content on social media forums. They are sensitive to instructions, and the introduced dialogue until classification consensus method exhibited superior performance over stand-alone reasoning, highlighting the merit in advancing prompt engineering methodologies. The models can produce appropriate contextual reasoning, even when final conclusions differ from their human counterparts.

Early Effects of the ESRD Treatment Choices Model on Kidney Transplant Waitlist Additions

Key Points

The ESRD Treatment Choices model did not lead to an increase in kidney transplant waitlisting. The COVID-19 pandemic had a substantial impact on kidney transplant waitlist additions. Financial incentives alone, in the short term, did not lead to a substantial effect on kidney transplant waitlisting practices.

Background

Despite the mortality benefit of kidney transplantation over dialysis, only 13% of patients with ESKD are on the transplant waitlist. Given the low rates of transplant waitlisting in the United States, Medicare launched the ESRD Treatment Choices (ETC) model in 2021, the largest mandatory trial of payment incentives in kidney disease, which randomized 30% of health care markets to financial bonuses/penalties to improve kidney transplantation and home dialysis use. This study examines the effect of ETC payment adjustments on US kidney transplant waitlist additions.

Methods

Using data from the Organ Procurement and Transplantation Network registry, we examined kidney transplant waitlisting trends between January 1, 2017, and June 30, 2022. Participants were divided into intervention and control arms of the ETC model. Using an interrupted time series design, we compared slope changes in waitlist additions after ETC model implementation (implementation date: January 01, 2021) between the two arms, while accounting for differential changes during the coronavirus disease 2019 pandemic. Results were stratified by race and ethnicity (White, Black, Hispanic, and other). To examine balance between the two ETC arms, we conducted supplementary analyses using United States Renal Data System and Medicare data.

Results

After implementation of the ETC model, there were 5550 waitlist additions in the intervention arm and 11,332 additions in the control arm (versus 14,023 and 30,610 additions before the ETC model). After ETC model implementation, there were no significant differences in kidney transplant waitlist additions between the two arms for the overall cohort (slope difference 6.9 new listings/mo; 95% confidence interval [CI], −7.4 to 21.1) or among White (slope difference 2.6/mo; 95% CI, −3.0 to 8.1), Black (slope difference 2.2/mo; 95% CI, −4.3 to 8.7), or Hispanic (slope difference 0.2/mo; 95% CI, −4.5 to 4.9) patients.

Conclusions

In the 18 months after implementation, the ETC model was not associated with significant changes in new kidney transplant waitlist additions.

Dialysis Facility Staffing Ratios and Kidney Transplant Access Among Adolescents and Young Adults

Importance

Patient to staff ratios vary across US dialysis facilities and have been associated with patient outcomes in older adults.

Objective

To determine whether patient to nurse or patient to social worker staff ratios are associated with access to kidney transplant for adolescents and young adults.

Design, Setting, and Participants

Retrospective cohort study including patients aged 12 to 30 years who started dialysis between 2005 and 2019 at 8490 US facilities according to the US Renal Data System, the national end-stage kidney disease registry.

Exposures

Time-updated quartile of patient to nurse and patient to social worker ratios at dialysis facilities.

Main Outcomes and Measures

Fine-Gray models were used to relate the exposure to the incidence of waitlisting and kidney transplant, accounting for the competing risk of death. Subgroup analysis by age at dialysis initiation (<22 vs ≥22 years) was performed. Follow-up was censored in January 2020.

Results

A total of 54 141 participants were included (median age, 25 years [IQR, 21-28]; 54.4% male; 4.3% of Asian race, 35.3% of non-Hispanic Black race). The median patient to staff ratios were 14.4 patients per nurse (IQR, 10.3-18.9) and 91.0 patients per social worker (IQR, 65.2-115.0). During a median follow-up of 2.6 years, 39.9% of patients (n = 21 598) received a transplant. In adjusted analysis, the highest (vs lowest) quartile of patient to nurse ratios was associated with 14% lower incidence of transplant (subhazard ratio [SHR], 0.86 [95% CI, 0.82-0.91]). The highest (vs lowest) quartile of patient to social worker ratios was associated with lower incidence of waitlisting (SHR, 0.95 [95% CI, 0.91-0.99]) and transplant (SHR, 0.85 [95% CI, 0.81-0.89]). For both staff ratios, there was an interaction with age at dialysis initiation, such that the association was more pronounced in patients starting dialysis at younger than 22 years (SHR, 0.71 [95% CI, 0.65-0.78] for the highest vs lowest quartile for nursing; SHR, 0.74 [95% CI, 0.68-0.80] for social work) compared with those 22 years and older (SHR, 1.00 [95% CI, 0.94-1.06] for nursing; SHR, 0.96 [95% CI, 0.91-1.02] for social work) for the outcome of transplant.

Conclusions and Relevance

Adolescents and young adults receiving care at dialysis facilities with higher patient to staff ratios had reduced access to waitlisting and transplant, particularly if they were younger than 22 years of age at dialysis initiation.

Reducing Disparities in Access to Kidney Transplantation Regional Study: A Randomized Trial in the Southeastern United States

Key Points

Declines in referral mirror national trends; however, declines were less for some groups receiving the intervention, warranting long-term follow-up. The findings provide important context for future modification and scale-up of multilevel, multicomponent interventions in dialysis settings.

Background

The Southeastern United States has among the lowest rates of kidney transplantation nationally and has documented racial and socioeconomic disparities in transplant access. We assessed the effectiveness and implementation of a multicomponent intervention aimed at increasing access and reducing disparities in access to early transplant steps in Georgia, North Carolina, and South Carolina.

Methods

The Reducing Disparities in Access to Kidney Transplantation Regional Study randomized 440 dialysis facilities in Georgia, North Carolina, and South Carolina to receive the Reducing Disparities in Access to Kidney Transplantation Regional educational and quality intervention or standard of care in 2018. The primary outcome was a change in dialysis facility–level transplant referral within 1 year of dialysis start after intervention, with secondary outcomes examining changes in evaluation start within 6 months of referral and waitlisting within 1 year of evaluation start. A process evaluation included a postimplementation survey (N =220) and semistructured interviews of staff (N =4). Generalized linear mixed-effects models assessed intervention effectiveness overall and in race subgroups.

Results

Among the 25,586 patients with ESKD treated in 440 dialysis facilities, referral rates decreased across both intervention arms 1 year after intervention; however, a greater decrease in referrals was observed among control (11.2% to 9.2%) versus intervention (11.2% to 10.5%) facilities. We observed no significant difference in the likelihood of referral among Black patients in intervention versus control facilities after intervention (adjusted odds ratio, 1.12; 95% confidence interval, 0.94 to 1.33); however, a significant increase in referral was observed among White patients in intervention facilities after intervention (odds ratio, 1.24; 95% confidence interval, 1.02 to 1.51). Interviews highlighted the importance of tailored interventions, federal mandates, and implementation challenges for large pragmatic trials.

Conclusions

Postintervention declines in referral mirror national trends; however, these declines were less for some groups receiving the intervention, warranting long-term follow-up. These findings provide important context for future modification and scale-up of multilevel, multicomponent interventions in dialysis settings.

Clinical Trial registry name and registration number:

The study protocol is available on ClinicalTrials.gov (identifier: NCT02389387 ).

Use of Federal Reimbursement for Living Donor Costs by Racial and Ethnic Minorities: Implications for Disparities in Access to Living Donor Transplantation

BACKGROUND

Minority race, ethnicity, and financial barriers are associated with lower rates of living donor (LD) kidney transplantation (LDKT). Financial reimbursement for LD costs may impact social determinants of health and, therefore, impact disparities in access to LDKT.

METHODS

Among US LDKTs, we studied associations between racial and ethnic minority status and utilization of the National Living Donor Assistance Center (NLDAC), a means-tested reimbursement program for nonmedical LD costs. We analyzed demographic, clinical, income, and survey data from NLDAC and the Scientific Registry of Transplant Recipients (January 1, 2011, to December 31, 2022) to identify predictors of NLDAC utilization.

RESULTS

Among 70 069 US LDKTs, 6093 NLDAC applicants were identified (9% of US LDKTs). Racial and ethnic minorities were over-represented in NLDAC-supported LDKTs compared with non-NLDAC US LDKTs (Black donors 12% versus 9%; Black recipients 15% versus 12%; Hispanic donors 21% versus 14%; Hispanic recipients 23% versus 15%; all P  < 0.001). Among preemptive transplants, use of NLDAC by donors to Hispanic recipients (11%) was nearly twice as high as that of non-Hispanic recipients (6%) ( P  < 0.001). At time of NLDAC application, 72% stated NLDAC "will make it possible" to donate; higher proportions of minority applicants agreed (Black 80%, White 70%, P  < 0.001; Hispanic 79%, non-Hispanic 70%, P  < 0.001). Racial and ethnic minority-concordant transplants were significantly more likely to use NLDAC (donor/recipient: Black/Black risk-adjusted odds ratio [OR], 1.85, other/other OR 2.59, Hispanic/Hispanic OR 1.53; all P  < 0.05).

CONCLUSIONS

Reduction of LD financial barriers may increase access to LDKT, particularly in racial and ethnic minority communities.

Inclusive Laboratory Reference Intervals and Clinical Studies to Reduce Health Disparities

Health inequities are common and in part a consequence of non-inclusive health research. The underrepresentation of specific populations in research, including women, children, youth and the elderly, racialized and ethnic groups, and sexual and gender minorities, results in limited ability to develop appropriate reference intervals, determine effective treatments, and establish health guidelines to optimize health outcomes for all. By working together toward greater inclusivity in all aspects of health research and care, health care providers and professional medical societies, including laboratory medicine practitioners, have the ability to achieve health equity.

Deficits in Pre- and Post-transplant Functional, Motor, and Cognitive Deficits Associated With Graft Failure and Mortality in Pediatric Heart Transplant Recipients

BACKGROUND

Pretransplant functional, motor, cognitive, and academic deficits are common in pediatric patients requiring heart transplantation (HT); some persist post-HT. We assessed the association between these quality of life (QoL) deficits and post-HT outcomes.

METHODS

Using SRTR data 2008-2023, we evaluated the functional, motor, cognitive, and academic status of pediatric HT recipients from listing to 15 years post-HT. We compared all-cause graft survival among patients with vs. without pre-HT deficits using Cox regressions. Among patients with a functioning graft at 1 year, we assessed the association between deficits at that time and subsequent graft failure.

RESULTS

In 6153 HT recipients, 85.3% had pre-HT functional status ≤ 80%, 53.1% of patients could not tolerate a full academic load; this decreased to 15.2% and 15.0% postoperatively, and was sustained. Definite or probable cognitive deficits were seen in 17.4% of patients and motor delays in 18.6%; both remained stable post-HT at 18.0% and 16.4%, respectively. Graft survival was worse in those with either pre- or post-HT deficits in functional status. Worse pre-HT functional status was associated with risk of graft failure (adjusted hazard ratio [aHR] per 10% decrease = 1.03 1.06 1.08, p < 0.001); worse 1-year post-HT functional status was much more strongly associated with risk of graft failure (aHR = 1.13 1.18 1.23, p < 0.001).

CONCLUSION

Pediatric HT recipients with decreased functional status are at higher risk for graft failure and mortality. These patients may benefit from early intervention aimed at improving functional status.

Exploring the relationship between website quality and equity in living donor kidney transplant

Background

Health system websites are important resources to guide health care decisions and may be useful tools to improve racial equity in access to living donor kidney transplant (LDKT).

Methods

We performed a cross-sectional study of adult LDKT programs in the United States. We created an assessment tool for website quality across three domains: accessibility (access to LDKT specific information from the transplant center website), readability (ease of reading and clarity), and educational content (appropriateness and presentation of information, LDKT-specific content, program-specific characteristics, and adherence to equity-centered principles of web design).

Results

Among the 185 transplant center websites reviewed, only 14.6% of LDKT sites could be accessed directly from the transplant center webpage. The median suitability assessment of materials (SAM)-a validated measure of website content for chronic kidney disease (CKD)-was 45 out of 86 (IQR 4) and the median Flesch-Kincaid grade level and ease score were 9.1 (IQR 0.8) on a scale of 0-18 and 51.2 (IQR 5) on a scale of 0-100, respectively.

Conclusion

These results indicate that LDKT websites are currently not available, accessible, and understandable for many potential transplant candidates and donors. Optimizing the content and design of transplant center websites may be a promising and effective strategy for improving equity in access to LDKT.

Racial disparities across multiple stages of the deceased organ donation process

Pervasive structural violence causes higher organ failure rates among Black Americans and excess Black potential deceased organ donors. Underuse of Black donors would exacerbate organ shortages that disproportionately harm Black transplant candidates. This study investigates racial differences in transit between distinct donation steps among 132 968 potential donors across 557 hospitals and 6 Organ Procurement Organizations (OPOs) from 2015 through 2021. Multilevel multistate modeling with patient covariates and OPO random effects shows adjusted likelihoods (95% confidence interval [CI]) of non-Black versus Black patients transitioning from OPO referral to approach: odds ratio (OR) 1.23 (95% CI 1.18, 1.27), approach to authorization: OR 1.64 (95% CI 1.56, 1.72), authorization to procurement: OR 1.08 (95% CI 1.02, 1.14), and procurement to transplant: OR 0.99 (95% CI 0.93, 1.04). Overall organ utilization rates for Black, Latino, White, and other OPO referrals were 5.88%, 8.17%, 6.78%, and 5.24%, respectively. Adjusting for patient covariates and hospital and OPO random effects, multilevel logistic models estimated that compared with Black patients, Latino, White, and other patients had ORs of organ utilization of 1.82 (95% CI 1.61, 2.04), 3.19 (95% CI 2.91, 3.50), and 1.25 (95% CI 1.06, 1.47), respectively. Nationwide in 2022, donor conversion disparities likely lost more than 1800 donors-70% of whom would have been Black. Achieving racial equity for transplant candidates will require reducing racial disparities in organ donation.

The Association between Residential Segregation and Access to Kidney Transplantation: Evidence from a Multistate Cohort Study

Key Points

Residential segregation is associated with reduced access to several important steps on the kidney transplant care continuum. Residential segregation affects both Black and White individuals with ESKD seeking lifesaving transplant.

Background

Individuals currently living in neighborhoods historically influenced by racial segregation have reduced access to health care. Whether this is true for individuals with ESKD seeking transplant is unknown.

Methods

We identified Black or White adults (N =42,401; 18–80 years) with ESKD initiating KRT in three US states (Georgia, North Carolina, South Carolina) between January 2015 and December 2019, with follow-up through 2020, from the United States Renal Data System. Residential segregation was defined using the racial Index of Concentration at the Extremes and classified into tertiles (predominantly Black, mixed, or predominantly White neighborhoods). Primary outcomes were referral within 12 months of KRT initiation (among individuals initiating KRT) and evaluation within 6 months of referral (among all referred individuals), determined by linkage of the United States Renal Data System to the Early Steps to Transplant Access Registry. Secondary outcomes included waitlisting (among evaluated individuals) and living or deceased donor transplant (among waitlisted individuals). The association between residential segregation and each outcome was assessed using multivariable Cox models with robust sandwich variance estimators.

Results

In models adjusted for clinical factors, individuals living in predominantly Black or mixed (versus predominantly White) neighborhoods were 8% (adjusted hazard ratio [aHR], 0.92 [0.88 to 0.96]) and 5% (aHR, 0.95 [0.91 to 0.99]) less likely to be referred for a kidney transplant, 18% (aHR, 0.82 [0.76 to 0.90]) and 9% (aHR, 0.91 [0.84 to 0.98]) less likely to be waitlisted among those who started evaluation, and 54% (aHR, 0.46 [0.36 to 0.58]) and 24% (aHR, 0.76 [0.63 to 0.93]) less likely to receive a living donor kidney transplant among those who were waitlisted, respectively. For other transplant steps, associations were nonsignificant.

Conclusions

Individuals with ESKD living in historically and currently marginalized communities in the Southeast United States have reduced access to important steps along the transplant care continuum.

Living Donor Candidates' Self-reported Health and Health Perceptions and Completion of Donor Evaluation: A Cohort Study

Rationale & Objective

Given the organ shortage in the United States, increasing living donation is vital to improving access to kidney transplantation, but many donor candidates do not complete the donor evaluation. Our objective was to understand potential living donors' perceived health and its association with the likelihood of completing the donor evaluation process.

Study Design

Potential donors' self-reported health was ascertained using the Patient Reported Outcomes Measurement Information System (PROMIS) global physical and mental health and the Davies and Ware Health Perceptions surveys.

Setting & Participants

Potential living donors who expressed interest in donation at a single medical center were recruited prospectively between 2017 and 2022.

Exposure

Donors' self-reported health and health perceptions.

Outcomes

Completion of the donor evaluation.

Analytical Approach

Adjusted linear and logistic regression models were used to examine the association between self-reported health and health perceptions with outcomes.

Results

A total of 1,347 individuals were included for study; 46% (N = 613) were < 40 years of age, 71% (n = 951) were female, 22% (n = 294) were of Hispanic ethnicity, and 16% (n = 215) completed the donor evaluation. The mean PROMIS global physical health (17.0 ± 1.9) and mental health (15.5 ± 2.7) raw scores were higher among donor candidates proceeding to completion of the donor evaluation when compared with those who withdrew early in the process (16.3 ± 2.2 for physical health and 14.9 ± 3.1 for mental health). Every z-score change in the PROMIS physical health score was associated with 1.48-fold higher odds of completing the donor evaluation (95% CI, 1.19-1.85). Fully adjusted models incorporating the PROMIS scores for predicting the completion of donor evaluations had a c-statistic of 0.70. Potential donors' Davies and Wares health perceptions did not predict the likelihood of completing the donor evaluation in fully adjusted models.

Limitations

Data are derived from a single center and may not generalize to the donor evaluation process at other transplant centers.

Conclusions

Donor candidates' self-reported physical health may serve as a predictor of the likelihood of completing the donor evaluation process and a potential avenue for future interventions.

Renal Disease and Kidney Transplantation in Hispanic American Persons

The Hispanic population of the United States is the second largest racial or ethnic group, comprising 18.7% of the population. However, this population is incredibly heterogeneous differing in genetic traits, cultural upbringing, educational backgrounds, and financial status. The impact of this heterogeneity on the prevalence and outcomes of renal disease and kidney transplantation is understudied compared with non-Hispanic White and Black populations. What is known appears to be underrecognized. This review aims to critically assess current medical literature on Hispanic individuals, focusing on etiological factors, disease progression, and outcomes related to CKD and kidney transplantation. By doing so, we aim to underscore key areas for further in-depth investigation.

Neighborhood Socioeconomic Deprivation is Associated with Worse Outcomes in Pediatric Kidney Transplant Recipients

Key Points

This is the largest US cohort study investigating neighborhood socioeconomic deprivation and outcomes among pediatric kidney transplant recipients. High neighborhood deprivation was associated with worse graft survival and lower access to preemptive and living donor transplantation. Findings demonstrate inequities in pediatric kidney transplantation associated with neighborhood-level factors that warrant intervention.

Background

Social determinants of health shape a child's transplant course. We describe the association between neighborhood socioeconomic deprivation, transplant characteristics, and graft survival in US pediatric kidney transplant recipients.

Methods

US recipients younger than 18 years at the time of listing transplanted between January 1, 2010, and May 31, 2022 (N =9178) were included from the Scientific Registry of Transplant Recipients. Recipients were stratified into three groups according to Material Community Deprivation Index score, with greater score representing higher neighborhood socioeconomic deprivation. Outcomes were modeled using multivariable logistic regression and Cox proportional hazards models.

Results

Twenty-four percent (n =110) of recipients from neighborhoods of high socioeconomic deprivation identified as being of Black race, versus 12% (n =383) of recipients from neighborhoods of low socioeconomic deprivation. Neighborhoods of high socioeconomic deprivation had a much greater proportion of recipients identifying as being of Hispanic ethnicity (67%, n =311), versus neighborhoods of low socioeconomic deprivation (17%, n =562). The hazard of graft loss was 55% higher (adjusted hazards ratio [aHR], 1.55; 95% confidence interval [CI], 1.24 to 1.94) for recipients from neighborhoods of high versus low socioeconomic deprivation when adjusted for base covariates, race and ethnicity, and insurance status, with 59% lower odds (adjusted odds ratio [aOR], 0.41; 95% CI, 0.30 to 0.56) of living donor transplantation and, although not statistically significant, 8% lower odds (aOR, 0.92; 95% CI, 0.72 to 1.19) of preemptive transplantation. The hazard of graft loss was 41% higher (aHR, 1.41; 95% CI, 1.25 to 1.60) for recipients from neighborhoods of intermediate versus low socioeconomic deprivation when adjusted for base covariates, race and ethnicity, and insurance status, with 27% lower odds (aOR, 0.73; 95% CI, 0.66 to 0.81) of living donor transplantation and 11% lower odds (aOR, 0.89; 95% CI, 0.80 to 0.99) of preemptive transplantation.

Conclusions

Children from neighborhoods of high socioeconomic deprivation have worse graft survival and lower utilization of preemptive and living donor transplantation. These findings demonstrate inequities in pediatric kidney transplantation that warrant further intervention.

Using Animation to Address Disparities in Kidney Transplantation

This essay reviews an arts-based project based in Buffalo, New York, seeking to educate patients with kidney failure and their social network about the transplantation process. Through a multi-phase arts-based research project, informed by a community-based steering committee and key stakeholders, 33 educational animated videos were developed and tested for efficacy in samples of diverse patients at a regional transplant center. Animation was chosen for its potential to better explain health concepts more sensibly to patients and support knowledge dissemination to their social network, who may donate a kidney or support a recipient or donor. The videos are 2D, short in duration, and designed for easy viewing on small devices using characters, scenes, narration, and movement. Aesthetic choices reinforce learning: characters have confident posture, memorable features (e.g. hair style, clothing color) with minimal detail, and model diverse races, ethnicities, gender, and body types. Scenes feature light backgrounds, illuminate main images, and are as large as possible for small screens. Narration is slow, calm, and uses strategic pauses to introduce concepts. Movement is selective to reinforce the message (signaling). The animation was guided by self-efficacy theory and the cognitive theory of multimedia learning. Findings to date indicate promising results with respect to patient knowledge and the feasibility of using animation to address disparities in kidney transplantation. Figures illustrate the evolution of the project and provide examples of the art used to capture a given aspect of the transplantation process.

Experiences of Unanticipated Outcomes Among Ethnically Diverse Living Kidney Donors: A Qualitative Pilot Study

INTRODUCTION

Although living kidney donation is generally considered a safe procedure, it is ethically critical that prospective donors are fully informed before consent. However, prospective donors lack a deep understanding of the donation experience, making the postdonation aftermath feel unanticipated. We sought to gain in-depth qualitative descriptions of the short- and long-term risks and benefits associated with kidney donation among an ethnically diverse group of donors to offer a balanced view of the positive and negative experiences that may occur postdonation.

METHODS

We conducted individual narrative in-depth interviews (September 2020-March 2021) using the DIPEx (database of individual patient experiences) method with former living kidney donors primarily via Zoom.

RESULTS

Fourteen donors (10 women; 8 White, 5 Hispanic, and 1 Native American) completed interviews. Interactions with healthcare providers leading up to donation were largely positive; however, lack of clarity regarding postdonation laboratory values among primary care providers led three participants to be erroneously told they developed kidney disease. Most experienced unanticipated outcomes, including postsurgical complications (e.g., hernia), long-term fatigue (i.e., ≥12 weeks), emotional distress (e.g., depression), hypertension, and gout. Difficulty obtaining life insurance following donation was an unexpected challenge. Despite these issues, participants were unanimously enthusiastic about living kidney donation and reported no regrets.

CONCLUSIONS

Enthusiasm for living kidney donation remained high among all participants despite most experiencing negative outcomes. These findings suggest that greater transparency regarding postdonation experiences may not preclude the decision to move forward with living kidney donation. These narratives will be utilized for an online module of lived experiences of donation.

Majority Rules? Assessing Access to Kidney Transplantation in a Predominantly Hispanic Population

Key Points

In a Hispanic-majority population, Hispanic patients with CKD experience delayed transplant evaluation and waitlisting compared with White patients. Waitlisted Hispanic patients undergo fewer kidney transplants from all donor types and less preemptive transplantation than White patients. Despite greater comorbidity profiles, Hispanic patients on the kidney transplant waitlist have a lower attrition rate compared with White patients.

Background

Despite being the nation's largest ethnic minority, Hispanic Americans have inferior kidney transplant opportunities. San Antonio, TX, is the largest US city with a majority Hispanic population. We assessed the effect of this unique ethnic milieu on waitlisting and transplant practices among Hispanic patients.

Methods

We studied patients older than 18 years listed at our center for a kidney-only transplant between 2003 and 2022. Timing of waitlisting, transplant rates, and waitlist outcomes were compared between Hispanic and non-Hispanic White patients.

Results

We evaluated 11,895 patients, of whom 67% (n =8008) were Hispanic and 20% (n =2341) were White. Preemptive listing was less frequent in Hispanic patients (18% versus 37%). One third of the listed Hispanic patients (37%) and half of listed White patients (50%) were transplanted, with living donor kidney transplant performed in 59% (n =1755) and 77% (n =898), respectively. Adjusting for age, sex, blood type, preemptive listing, immunologic sensitization, education, employment, and listing era, Hispanic patients remained less likely to receive a deceased donor transplant (hazard ratio, 0.82; 95% confidence interval, 0.71 to 0.95). On covariate adjustment, White patients were more likely to experience waitlist death or deterioration (hazard ratio, 1.23; 95% confidence interval, 1.12 to 1.36).

Conclusions

Although waitlist attrition was more favorable among Hispanic patients, waitlist registration was delayed and kidney transplants less frequent compared with White patients. These data demonstrate that majority status alone does not mitigate ethnic disparities in kidney transplantation, while underlining the critical need for ongoing efforts to address physician and patient attitudes relating to suitability of Hispanic patients for transplantation.

Identifying when racial and ethnic disparities arise along the continuum of transplant care: a national registry study

Background

Fewer minoritized patients with end-stage kidney disease (ESKD) receive kidney transplantation (KT); efforts to mitigate disparities have thus far failed. Pinpointing the specific stage(s) within the transplant care continuum (being informed of KT options, joining the waiting list, to receiving KT) where disparities emerge among each minoritized population is pivotal for achieving equity. We therefore quantified racial and ethnic disparities across the KT care continuum.

Methods

We conducted a retrospective cohort study (2015-2020), with follow-up through 12/10/2021. Patients with incident dialysis were identified using the US national registry data. The exposure was race and ethnicity (Asian, Black, Hispanic, and White). We used adjusted modified Poisson regression to quantify the adjusted prevalence ratio (aPR) of being informed of KT, and cause-specific hazards models to calculate adjusted hazard ratios (aHR) of listing, and transplantation after listing.

Findings

Among 637,951 adults initiating dialysis, the mean age (SD) was 63.8 (14.6), 41.8% were female, 5.4% were Asian, 26.3% were Black, 16.6% were Hispanic, and 51.7% were White (median follow-up in years [IQR]:1.92 [0.97-3.39]). Black and Hispanic patients were modestly more likely to be informed of KT (Black: aPR = 1.02, 95% confidence interval [CI]:1.01-1.02; Hispanic: aPR = 1.03, 95% CI: 1.02-1.03) relative to White patients. Asian patients were more likely to be listed (aHR = 1.18, 95% CI: 1.15-1.21) but less likely to receive KT (aHR = 0.56, 95% CI: 0.54-0.58). Both Black and Hispanic patients were less likely to be listed (Black: aHR = 0.87, 95% CI: 0.85-0.88; Hispanic: aHR = 0.85, 95% CI: 0.85-0.88) and receive KT (Black: aHR = 0.61, 95% CI: 0.60-0.63; Hispanic: aHR = 0.64, 95% CI: 0.63-0.66).

Interpretation

Improved characterization of the barriers in KT access specific to each racial and ethnic group, and the interventions to address these distinct challenges throughout the KT care continuum are needed; our findings identify specific stages most in need of mitigation.

Funding

National Institutes of Health.

Evaluation and Long-Term Follow-Up of Living Kidney Donors

The evaluation of living kidney donor candidates is a complex and lengthy process. Donor candidates face geographic and socioeconomic barriers to completing donor evaluation. Inequities in access to living donations persist. With a growing demand for kidney transplants and a shortage of living donors, transplant centers are more permissive of accepting less-than-ideal donor candidates. Donors have an increased lifetime risk of kidney failure, but the absolute risk increase is small. Efforts are needed to support donor candidates to complete donor nephrectomy safely and efficiently and receive optimal follow-up care to prevent risk factors for kidney disease and detect complications early. In this article, the authors address key elements of donor kidney evaluation, including current living donation policy requirements and transplant center practices. The authors present a simplified comprehensive practical approach to help guide providers in completing donor evaluation and follow-up care with best outcomes possible.

Components of Residential Neighborhood Deprivation and Their Impact on the Likelihood of Live-Donor and Preemptive Kidney Transplantation

INTRODUCTION

Adults residing in deprived neighborhoods face various socioeconomic stressors, hindering their likelihood of receiving live-donor kidney transplantation (LDKT) and preemptive kidney transplantation (KT). We quantified the association between residential neighborhood deprivation index (NDI) and the likelihood of LDKT/preemptive KT, testing for a differential impact by race and ethnicity.

METHODS

We studied 403 937 adults (age ≥ 18) KT candidates (national transplant registry; 2006-2021). NDI and its 10 components were averaged at the ZIP-code level. Cause-specific hazards models were used to quantify the adjusted hazard ratio (aHR) of LDKT and preemptive KT across tertiles of NDI and its 10 components.

RESULTS

Candidates residing in high-deprivation neighborhoods were more likely to be female (40.1% vs. 36.2%) and Black (41.9% vs. 17.7%), and were less likely to receive both LDKT (aHR = 0.66, 95% confidence interval [CI]: 0.64-0.67) and preemptive KT (aHR = 0.60, 95% CI: 0.59-0.62) than those in low-deprivation neighborhoods. These associations differedby race and ethnicity (Black: aHRLDKT = 0.58, 95% CI: 0.55-0.62; aHRpreemptive KT = 0.68, 95% CI: 0.63-0.73; Pinteractions: LDKT < 0.001; Preemptive KT = 0.002). All deprivation components were associated with the likelihood of both LDKT and preemptive KT (except median home value): for example, higher median household income (LDKT: aHR = 1.08, 95% CI: 1.07-1.09; Preemptive KT: aHR = 1.10, 95% CI: 1.08-1.11) and educational attainments (≥high school [LDKT: aHR = 1.17, 95% CI: 1.15-1.18; Preemptive KT: aHR = 1.23, 95% CI: 1.21-1.25]).

CONCLUSION

Residence in socioeconomically deprived neighborhoods is associated with a lower likelihood of LDKT and preemptive KT, differentially impacting minority candidates. Identifying and understanding which neighborhood-level socioeconomic status contributes to these racial disparities can be instrumental in tailoring interventions to achieve health equity in LDKT and preemptive KT.

Navigating Living Kidney Donation and Transplantation Among South Asian Canadians: The ACTION Project

RATIONALE & OBJECTIVE

South Asian (SA) Canadians with kidney failure have a 50%-77% lower likelihood of kidney transplant and are less likely to identify potential living donors (LDs). This study aimed to identify health system-, patient-, and community-level barriers and facilitators for accessing LD kidney transplantation in the SA community to inform the development of health system- and community-level interventions to address barriers.

STUDY DESIGN

Qualitative study.

SETTING & PARTICIPANTS

20 SA recipients of an LD or deceased-donor kidney transplant, 10 SA LDs, and 41 general SA community members.

ANALYTICAL APPROACH

In-depth multilingual interviews were conducted with recipients and LDs. Gender-, language-, and age-stratified focus groups were conducted with general SA community members. Summative content analysis was used to analyze the data.

RESULTS

Hesitancy in approaching potential donors, fear about the health of potential LDs, information gaps, language barriers, and challenges evaluating out-of-country donors were highlighted as significant barriers by recipients, and financial concerns and information gaps were identified by donors. Cultural barriers in the SA community were highlighted by donors, recipients, and community members as critical factors when considering donation and transplant; women and elderly SA Canadians highlighted nuanced challenges. Participants reported generally a favorable perception of their health care teams, citing SA representation in the teams as important to providing culturally and linguistically sensitive care.

LIMITATIONS

Limited geographic, race, and cultural representation and reliance on virtual data collection.

CONCLUSIONS

This study highlights several culturally relevant barriers to donation and transplant that are potentially modifiable through patient-, health system-, and community-focused engagement and education.

Toward Equitable Kidney Function Estimation in Critical Care Practice: Guidance From the Society of Critical Care Medicine's Diversity, Equity, and Inclusion in Renal Clinical Practice Task Force

OBJECTIVES

Accurate glomerular filtration rate (GFR) assessment is essential in critically ill patients. GFR is often estimated using creatinine-based equations, which require surrogates for muscle mass such as age and sex. Race has also been included in GFR equations, based on the assumption that Black individuals have genetically determined higher muscle mass. However, race-based GFR estimation has been questioned with the recognition that race is a poor surrogate for genetic ancestry, and racial health disparities are driven largely by socioeconomic factors. The American Society of Nephrology and the National Kidney Foundation (ASN/NKF) recommend widespread adoption of new "race-free" creatinine equations, and increased use of cystatin C as a race-agnostic GFR biomarker.

DATA SOURCES

Literature review and expert consensus.

STUDY SELECTION

English language publications evaluating GFR assessment and racial disparities.

DATA EXTRACTION

We provide an overview of the ASN/NKF recommendations. We then apply an Implementation science methodology to identify facilitators and barriers to implementation of the ASN/NKF recommendations into critical care settings and identify evidence-based implementation strategies. Last, we highlight research priorities for advancing GFR estimation in critically ill patients.

DATA SYNTHESIS

Implementation of the new creatinine-based GFR equation is facilitated by low cost and relative ease of incorporation into electronic health records. The key barrier to implementation is a lack of direct evidence in critically ill patients. Additional barriers to implementing cystatin C-based GFR estimation include higher cost and lack of test availability in most laboratories. Further, cystatin C concentrations are influenced by inflammation, which complicates interpretation.

CONCLUSIONS

The lack of direct evidence in critically ill patients is a key barrier to broad implementation of newly developed "race-free" GFR equations. Additional research evaluating GFR equations in critically ill patients and novel approaches to dynamic kidney function estimation is required to advance equitable GFR assessment in this vulnerable population.

Evaluating site-of-care-related racial disparities in kidney graft failure using a novel federated learning framework

OBJECTIVES

Racial disparities in kidney transplant access and posttransplant outcomes exist between non-Hispanic Black (NHB) and non-Hispanic White (NHW) patients in the United States, with the site of care being a key contributor. Using multi-site data to examine the effect of site of care on racial disparities, the key challenge is the dilemma in sharing patient-level data due to regulations for protecting patients' privacy.

MATERIALS AND METHODS

We developed a federated learning framework, named dGEM-disparity (decentralized algorithm for Generalized linear mixed Effect Model for disparity quantification). Consisting of 2 modules, dGEM-disparity first provides accurately estimated common effects and calibrated hospital-specific effects by requiring only aggregated data from each center and then adopts a counterfactual modeling approach to assess whether the graft failure rates differ if NHB patients had been admitted at transplant centers in the same distribution as NHW patients were admitted.

RESULTS

Utilizing United States Renal Data System data from 39 043 adult patients across 73 transplant centers over 10 years, we found that if NHB patients had followed the distribution of NHW patients in admissions, there would be 38 fewer deaths or graft failures per 10 000 NHB patients (95% CI, 35-40) within 1 year of receiving a kidney transplant on average.

DISCUSSION

The proposed framework facilitates efficient collaborations in clinical research networks. Additionally, the framework, by using counterfactual modeling to calculate the event rate, allows us to investigate contributions to racial disparities that may occur at the level of site of care.

CONCLUSIONS

Our framework is broadly applicable to other decentralized datasets and disparities research related to differential access to care. Ultimately, our proposed framework will advance equity in human health by identifying and addressing hospital-level racial disparities.

"Weighing the Pros and Cons of Everything": A Qualitative Descriptive Study Exploring Perspectives About Living Donor Kidney Transplantation From Parents of Chinese Canadian Pediatric Patients With Chronic Kidney Disease

Background

As of 2021, more than 6000 children and youth in Canada were living with end-stage kidney disease (ESKD), for which kidney transplantation is considered the preferred treatment by health professionals. Research shows that living donor kidney transplantation (LDKT) has superior allograft and recipient survival compared to deceased donor kidney transplantation (DDKT). However, in a pediatric setting, the choice of LDKT or DDKT is a summative consideration of factors weighed carefully by the patient's family, health care team, and patient. Decision-making surrounding transplantation may be more complex for racial and ethnic minorities as culturally specific values and beliefs are interwoven within dominant understandings and concepts of health and accepted models of health care. For example, Chinese Canadians have an increased risk of ESKD, yet reduced access to LDKT compared to White patients, despite being the largest visible minority population in Canada.

Objective

The objective of this qualitative study is to deepen our understandings of the decision-making process surrounding DDKT versus LDKT among parents of Chinese Canadian pediatric patients with chronic kidney disease (CKD).

Design

Qualitative descriptive study design.

Setting

The Nephrology Program at The Hospital for Sick Children in Toronto, Canada.

Participants

Caregivers of Chinese Canadian patients with CKD, 18 years of age or older, and who spoke English, Cantonese, or Mandarin.

Methods

One-on-one, semistructured interviews were conducted virtually, by a member of the research team and were audio-recorded and transcribed verbatim. Thematic analysis was used to explore participants' shared experience.

Results

Seven interviews were conducted with 6 mothers and 1 father of 6 Chinese Canadian pediatric patients with CKD: 4 patients had undergone a kidney transplant, and 2 were not yet listed for transplant. Analysis of data highlighted that cultural influences affected whether parents shared with others about their child's illness and experience. The cultural understanding that it is inappropriate to burden others contributed to the creation of an isolating experience for participants. Cultural influences also impacted whether parents asked others to be a living donor as participants articulated this would place a physical burden on the living donor (e.g., potential risk to their health) and an emotional burden on the participant as they would be indebted to a willing donor. Ultimately, parents' decision to choose DDKT or LDKT for their patient-child was a result of evaluating both options carefully and within an understanding that the ideal treatment choice reflected what was best for all family members.

Limitations

Findings reflect experiences of a small sample from a single recruitment site which may limit transferability.

Conclusions

Parents in this study felt that they had access to the necessary evidence-based information to make an informed decision about the choice of DDKT versus LDKT for their child. Participant narratives described feeling isolated within cultural communities of family and friends and participants' suggestion of benefiting from increased support may guide future research directions. Practitioners can offer direct and indirect support to families, with recognition of the importance of cultural values and family-centered care on decision-making within families. Opportunities are needed for accessible, virtual social support platforms to increase parental feelings of culturally mediated peer support from parents who share similar experiences.

Engineering Equity Into the Promise of Xenotransplantation

Two of the greatest challenges facing kidney transplantation are the lack of donated organs and inequities in who receives a transplant. Xenotransplantation holds promise as a treatment approach that could solve the supply problem. Major advances in gene-editing procedures have enabled several companies to raise genetically engineered pigs for organ donation. These porcine organs lack antigens and have other modifications that should reduce the probability of immunological rejection when transplanted into humans. The US Food and Drug Administration and transplantation leaders are starting to chart a path to test xenotransplants in clinical trials and later integrate them into routine clinical care. Here we provide a framework that industry, regulatory authorities, payers, transplantation professionals, and patient groups can implement to promote equity during every stage in this process. We also call for immediate action. Companies developing xenotransplant technology should assemble patient advocacy boards to bring the concerns of individuals with end-stage kidney disease to the forefront. For trials, xenotransplantation companies should partner with transplant programs with substantial patient populations of racial and ethnic minority groups and that have reciprocal relationships with those communities. Those companies and transplant programs should reach out now to those communities to inform them about xenotransplantation and try to address their concerns. These actions have the potential to make these communities full partners in the promise of xenotransplantation.

Neighborhood Segregation and Access to Live Donor Kidney Transplantation

Importance

Identifying the mechanisms of structural racism, such as racial and ethnic segregation, is a crucial first step in addressing the persistent disparities in access to live donor kidney transplantation (LDKT).

Objective

To assess whether segregation at the candidate's residential neighborhood and transplant center neighborhood is associated with access to LDKT.

Design, Setting, and Participants

In this cohort study spanning January 1995 to December 2021, participants included non-Hispanic Black or White adult candidates for first-time LDKT reported in the US national transplant registry. The median (IQR) follow-up time for each participant was 1.9 (0.6-3.0) years.

Main Outcome and Measures

Segregation, measured using the Theil H method to calculate segregation tertiles in zip code tabulation areas based on the American Community Survey 5-year estimates, reflects the heterogeneity in neighborhood racial and ethnic composition. To quantify the likelihood of LDKT by neighborhood segregation, cause-specific hazard models were adjusted for individual-level and neighborhood-level factors and included an interaction between segregation tertiles and race.

Results

Among 162 587 candidates for kidney transplant, the mean (SD) age was 51.6 (13.2) years, 65 141 (40.1%) were female, 80 023 (49.2%) were Black, and 82 564 (50.8%) were White. Among Black candidates, living in a high-segregation neighborhood was associated with 10% (adjusted hazard ratio [AHR], 0.90 [95% CI, 0.84-0.97]) lower access to LDKT relative to residence in low-segregation neighborhoods; no such association was observed among White candidates (P for interaction = .01). Both Black candidates (AHR, 0.94 [95% CI, 0.89-1.00]) and White candidates (AHR, 0.92 [95% CI, 0.88-0.97]) listed at transplant centers in high-segregation neighborhoods had lower access to LDKT relative to their counterparts listed at centers in low-segregation neighborhoods (P for interaction = .64). Within high-segregation transplant center neighborhoods, candidates listed at predominantly minority neighborhoods had 17% lower access to LDKT relative to candidates listed at predominantly White neighborhoods (AHR, 0.83 [95% CI, 0.75-0.92]). Black candidates residing in or listed at transplant centers in predominantly minority neighborhoods had significantly lower likelihood of LDKT relative to White candidates residing in or listed at transplant centers located in predominantly White neighborhoods (65% and 64%, respectively).

Conclusions

Segregated residential and transplant center neighborhoods likely serve as a mechanism of structural racism, contributing to persistent racial disparities in access to LDKT. To promote equitable access, studies should assess targeted interventions (eg, community outreach clinics) to improve support for potential candidates and donors and ultimately mitigate the effects of segregation.

Relationships, race/ethnicity, gender, age, and living kidney donation evaluation willingness

Racial/ethnic and gender disparities in living donor kidney transplantation are large and persistent but incompletely explained. One previously unexplored potential contributor to these disparities is differential willingness to donate to recipients in specific relationships such as children, parents, and friends. We collected and analyzed data from an online sample featuring an experimental vignette in which respondents were asked to rate their willingness to donate to a randomly chosen member of their family or social network. Results show very large differences in respondents' willingness to donate to recipients with different relationships to them, favoring children, spouses/partners, siblings, and parents, and disfavoring friends, aunts/uncles, and coworkers. Evidence suggesting an interactive effect between relationship, respondent race/ethnicity, respondent or recipient gender, was limited to a few cases. At the p < 0.05 level, the parent-recipient gender interaction was statistically significant, favoring mothers over fathers, as was other/multiracial respondents' greater willingness to donate to friends compared to Whites. Additionally, other interactions were significant at the p < 0.10 level, such as Hispanics' and women's higher willingness to donate to parents compared to Whites and men respectively, women's lower willingness to donate to friends compared to men, and Blacks' greater willingness to donate to coworkers than Whites. We also examined differences by age and found that older respondents were less willing to donate to recipients other than their parents. Together these results suggest that differential willingness to donate by relationship group may be a moderately important factor in understanding racial/ethnic and gender disparities in living donor kidney transplantation.

Racialized and Immigrant Status and the Pursuit of Living Donor Kidney Transplant - a Canadian Cohort Study

Introduction

Both immigrant and racialized status may be associated with the pursuit of living donor kidney transplant (LDKT).

Methods

This study was a secondary analysis of a convenience cross-sectional sample of patients with kidney failure in Toronto, obtained from our "Comprehensive Psychosocial Research Data System" research database. The exposures included racialized, immigrant, and combined immigrant and racialized status (White nonimmigrant, racialized nonimmigrant, White immigrant and racialized immigrant). Outcomes include the following: (i) having spoken about LDKT with others, (ii) having a potential living donor (LD) identified, (iii) having allowed others to share the need for LDKT, (iv) having directly asked a potential donor to be tested, and (v) accept a hypothetical LDKT offer. We assessed the association between exposure and outcomes using univariable, and multivariable binary or multinominal logistic regression (reference: White or White nonimmigrant participants).

Results

Of the 498 participants, 281 (56%) were immigrants; 142 (28%) were African, Caribbean, and Black (ACB); 123 (25%) were Asian; and 233 (47%) were White. Compared to White nonimmigrants, racialized immigrants (relative risk ratio [RRR]: 2.98; 95% confidence interval [CI]: 1.76-5.03) and racialized nonimmigrants (RRR: 2.84; 95% CI: 1.22-6.65) were more likely not to have spoken about LDKT with others (vs. having spoken or planning to do so). Both racialized immigrant (odds ratio [OR]: 4.07; 95% CI: 2.50-6.34), racialized nonimmigrants (OR: 2.68; 95% CI: 1.31-5.51) and White immigrants (OR: 2.68; 95% CI: 1.43-5.05) were more likely not to have a potential LD identified.

Conclusion

Both racialized and immigrant status are associated with less readiness to pursue LDKT. Supporting patients to communicate their need for LDKT may improve equitable access to LDKT.

Reviewing Racial Disparities in Living Donor Kidney Transplantation: a Socioecological Approach

Despite kidney transplantation having superior outcomes to dialytic therapies, disparities continue to exist among rates of kidney transplantation between Black and non-Hispanic White patients, which cannot be explained by differences in individual characteristics. To better evaluate the persistent Black/White disparities in living kidney transplantation, we review the extant literature and include the critical factors and recent development in living kidney transplantation in the socioecological approach. We also emphasize the potential vertical and hierarchical associations among factors in the socioecological model. Specifically, this review explores the possibility that the relatively low living kidney transplantation among Blacks may be a consequence of individual, interpersonal, and structural inequalities in various social and cultural dimensions. At the individual level, the Black/White differences in socioeconomic conditions and transplant knowledge may account for the low transplantation rates among Blacks. Interpersonally, the relatively weak social support and poor communication between Black patients and their providers may contribute to disparities. At the structural level, the race-based glomerular filtration rate (GFR) calculation that is widely used to screen Black donors is a barrier to receiving living kidney transplantation. This factor is directly related to structural racism in the health care system but its potential impact on living donor transplantation is underexplored. Finally, this literature review emphasizes the current perspective that a race-free GFR should be considered and a multidisciplinary and interprofessional perspective is necessary to devise strategies and interventions to reduce the Black/White disparities in living donor kidney transplantation in the U.S.

Health Inequity in Likelihood and Time to Renal Recovery after Living Kidney Donation: Implications for Kidney Health in Black Americans

BACKGROUND

Live donor kidney transplantation has been popularized to help mitigate the organ shortage crisis. At the time of living donor nephrectomy, living donors lose 50% of their kidney function or glomerular filtration rate (GFR). Studies have shown that in healthy living donors, the remaining kidney is able to adapt and recover 10% to 25% of postdonation lost GFR. GFR recovery is critical to long-term kidney health, particularly for Black Americans who disproportionately suffer from kidney disease with an incidence 2.5 times White Americans. To date, no study has examined whether health inequities in renal recovery postdonation exist.

STUDY DESIGN

We retrospectively analyzed 100,121 living kidney donors reported to the Scientific Registry of Transplant Recipients between 1999 and 2021. We estimated GFR (eGFR) using the Chronic Kidney Disease Epidemiology Collaboration 2021 equation and predicted the likelihood (logistic regression) and time (Cox regression) to recovery of 60% and 75% predonation eGFR. Models adjusted for age, sex, race, BMI, and predonation eGFR.

RESULTS

Black patients were 47% (adjusted odds ratio 0.53, 95% CI 0.50 to 0.56, p < 0.001) and 43% (adjusted odds ratio 0.57, 95% CI 0.54 to 0.60, p < 0.001) less likely to recover 60% and 75% of predonation eGFR, respectively, compared with their White counterparts. The hazard ratio for time to renal recovery of 60% and 75% of predonation eGFR was 22% (adjusted hazard ratio 0.78, 95% CI 0.76 to 0.80, p < 0.001) and 38% (adjusted hazard ratio 0.62, 95% CI 0.60 to 0.65, p < 0.001) lower, respectively, than White patients.

CONCLUSIONS

Black living kidney donors were less likely to recover predonation eGFR, and time to renal recovery was significantly longer than their White counterparts. These data highlight the need for enhanced living kidney donor follow-up, particularly for Black living kidney donors who are at greatest future risk of end-stage kidney disease.

Unrecognized opportunities: The landscape of pediatric kidney-paired donation in the United States

BACKGROUND

Pediatric (age < 18 years) kidney transplant (KT) candidates face increasingly complex choices. The 2014 kidney allocation system nearly doubled wait times for pediatric recipients. Given longer wait times and new ways to optimize compatibility, more pediatric candidates may consider kidney-paired donation (KPD). Motivated by this shift and the potential impact of innovations in KPD practice, we studied pediatric KPD procedures in the US from 2008 to 2021.

METHODS

We describe the characteristics and outcomes of pediatric KPD recipients with comparison to pediatric non-KPD living donor kidney transplants (LDKT), pediatric LDKT recipients, and pediatric deceased donor (DDKT) recipients.

RESULTS

Our study cohort includes 4987 pediatric DDKTs, 3447 pediatric non-KPD LDKTs, and 258 pediatric KPD transplants. Fewer centers conducted at least one pediatric KPD procedure compared to those that conducted at least one pediatric LDKT or DDKT procedure (67, 136, and 155 centers, respectively). Five centers performed 31% of the pediatric KPD transplants. After adjustment, there were no differences in graft failure or mortality comparing KPD recipients to non-KPD LDKT, LDKT, or DDKT recipients.

DISCUSSION

We did not observe differences in transplant outcomes comparing pediatric KPD recipients to controls. Considering these results, KPD may be underutilized for pediatric recipients. Pediatric KT centers should consider including KPD in KT candidate education. Further research will be necessary to develop tools that could aid clinicians and families considering the time horizon for future KT procedures, candidate disease and histocompatibility characteristics, and other factors including logistics and donor protections.

Intersectional race and gender disparities in kidney transplant access in the United States: a scoping review

BACKGROUND

Gender and racial disparities in kidney transplant access are well established, however how gender and race interact to shape access to kidney transplant is less clear. Therefore, we examined existing literature to assess what is known about the potential interaction of gender and race and the impact on access to kidney transplantation in the US.

METHODS

Following PRISMA guidelines, we conducted a scoping review and included quantitative and qualitative studies published in English between 1990 and May 31, 2023 among adult end-stage kidney disease patients in the US. All studies reported on access to specific transplant steps or perceived barriers to transplant access in gender and race subgroups, and the intersection between the two. We narratively synthesized findings across studies.

RESULTS

Fourteen studies met inclusion criteria and included outcomes of referral (n = 4, 29%), evaluation (n = 2, 14%), waitlisting (n = 4, 29%), transplantation (n = 5, 36%), provider perceptions of patient transplant candidacy (n = 3, 21%), and patient preferences and requests for a living donor (n = 5, 36%). Overall, we found that White men have the greatest access at all steps of the transplant process, from referral to eventual living or deceased donor transplantation. In contrast, women from racial or ethnic minorities tend to have the lowest access to kidney transplant, in particular living donor transplant, though this was not consistent across all studies.

CONCLUSIONS

Examining how racism and sexism interact to shape kidney transplant access should be investigated in future research, in order to ultimately shape policies and interventions to improve equity.

Improving Health Equity in Living Donor Kidney Transplant: Application of an Implementation Science Framework

BACKGROUND

Interventions to improve racial equity in access to living donor kidney transplants (LDKT) have focused primarily on patients, ignoring the contributions of clinicians, transplant centers, and health system factors. Obtaining access to LDKT is a complex, multi-step process involving patients, their families, clinicians, and health system functions. An implementation science framework can help elucidate multi-level barriers to achieving racial equity in LDKT and guide the implementation of interventions targeted at all levels.

METHODS

We adopted the Pragmatic Robust Implementation and Sustainability Model (PRISM), an implementation science framework for racial equity in LDKT. The purpose was to provide a guide for assessment, inform intervention design, and support planning for the implementation of interventions.

RESULTS

We applied 4 main PRISM domains to racial equity in LDKT: Organizational Characteristics, Program Components, External Environment, and Patient Characteristics. We specified elements within each domain that consider perspectives of the health system, transplant center, clinical staff, and patients.

CONCLUSION

The applied PRISM framework provides a foundation for the examination of multi-level influences across the entirety of LDKT care. Researchers, quality improvement staff, and clinicians can use the applied PRISM framework to guide the assessment of inequities, support collaborative intervention development, monitor intervention implementation, and inform resource allocation to improve equity in access to LDKT.

Barriers to home dialysis and kidney transplantation for socially disadvantaged individuals

PURPOSE OF REVIEW

People with kidney disease facing social disadvantage have multiple barriers to quality kidney care. The aim of this review is to summarize the patient, clinician, and system wide factors that impact access to quality kidney care and discuss potential solutions to improve outcomes for socially disadvantaged people with kidney disease.

RECENT FINDINGS

Patient level factors such as poverty, insurance, and employment affect access to care, and low health literacy and kidney disease awareness can affect engagement with care. Clinician level factors include lack of early nephrology referral, limited education of clinicians in home dialysis and transplantation, and poor patient-physician communication. System-level factors such as lack of predialysis care and adequate health insurance can affect timely access to care. Neighborhood level socioeconomic factors, and lack of inclusion of these factors into public policy payment models, can affect ability to access care. Moreover, the effects of structural racism and discrimination nay negatively affect the kidney care experience for racially and ethnically minoritized individuals.

SUMMARY

Patient, clinician, and system level factors affect access to and engagement in quality kidney care. Multilevel solutions are critical to achieving equitable care for all affected by kidney disease.

"You don't know what you don't know": A qualitative study of informational needs of patients, family members, and living donors to inform transplant system metrics

INTRODUCTION

Informational needs and potential use of transplant metrics, especially among patients, remain understudied and a critical component of the transplant community's commitment to patient-centered care. We sought to understand the perspectives and needs of patients, family members/caregivers, living donors, and deceased donor family members.

METHODS

We examined decision-making experiences and perspectives on the needs of these stakeholder groups for data about the national transplant system among 58 participants of 14 focus groups and 6 interviews.

RESULTS

Three major themes emerged: 1) informational priorities and unmet needs (transplantation system processes, long-term outcomes data, prelisting data, patient-centered outcomes, and ability to compare centers and regions); 2) challenges obtaining relevant and trustworthy information (patient burden and effort, challenges with medical jargon, and difficulty finding trustworthy information); and 3) burden of facing the unknown (stress and anxiety leading to difficulty processing information, challenges facing the transplant journey when you "don't know what you don't know").

CONCLUSION

Patient, family member, and living donor participation in shared decision-making has been limited by inadequate access to patient-centered information. New metrics and patient-facing data presentations should address these content gaps using best practices to improve understanding and support shared decision-making.

COVID-19 and Access to Kidney Transplantation for Older Candidates in the United States: A National Registry Study

Rationale & Objective

Coronavirus disease (COVID)-19 has likely impacted accessibility to transplantation services among older adults (age ≥65 years). We quantified the impact of COVID-19 on kidney transplantation access for older kidney-only candidates registered on the United States (US) kidney waitlist.

Study Design

Retrospective analysis of registry data.

Setting & Participants

57,222 older adults who were part of or added to the US kidney waitlist between January 1, 2016 and February 28, 2022, identified using the Scientific Registry of Transplant Recipients (SRTR).

Exposures

Four COVID-19 waves and one nonwave period based on the national incidence of COVID-19 in the US (initial: March 15-May 30, 2020; winter 2020-2021: December 1, 2020-January 31, 2021; delta: August 1, 2021-September 30, 2021; omicron: December 1, 2021-February 28, 2022; nonwave: inter-wave periods).

Outcomes

Waitlist registrations, deceased-donor kidney transplants, living-donor kidney transplants, waitlist mortality, and waitlist removals due to deteriorating condition (hereafter referred to as removals).

Analytical Approach

Poisson regression for the adjusted incidence rate ratio (aIRR) of each outcome during the COVID-19 waves and the nonwave period relative to reference (January 1, 2016-December 31, 2019), adjusted for seasonality and secular trends.

Results

Waitlist registrations initially declined and increased henceforth. Deceased-donor kidney transplants and living-donor kidney transplants remained below-expected levels during all waves. Waitlist mortality peaked during the winter 2020-2021 wave (aIRR: 1.701.982.30) and has declined since; mortality rates were 139%, 107%, and 251% above expected for Black candidates, men, and candidates aged ≥75 years, respectively, during the winter 2020-2021 wave. Removals increased from 22% below expected levels (initial wave) to 26% above expected levels (omicron wave); removals were nonsignificantly higher than expected during the omicron wave for older Black and Hispanic candidates.

Limitations

The findings are not generalizable to those listed at earlier ages with prolonged waitlist times. Additionally, using national COVID-19 incidence does not consider local policy and health care variations. Lastly, aIRRs must be interpreted cautiously due to smaller daily event counts.

Conclusions

COVID-19 was associated with fewer transplants and increased mortality and removals in older kidney transplant candidates. Transplant providers should consider this impact and implement policies and practices to ensure the continuity of care.

Plain-Language Summary

The proportion of older adults on the kidney transplant waitlist is increasing, but the impact of COVID-19 on this population is not well characterized. In this study, we looked at incident waitlist registrations, deceased- and living-donor kidney transplants, and waitlist mortality and removals due to deteriorating condition over 4 waves of COVID-19. We found that transplantation services did not fully recover to prepandemic levels as of March 2022. Notably, racial/ethnic minorities and older men experienced lower rates of kidney transplants and higher rates of waitlist mortality, respectively, relative to White candidates and older women. Identifying vulnerable subpopulations affected by COVID-19 and its long-term impact is crucial for creating strategies to ensure the continuity of care in this population during public health emergencies.