Variation in Amputation Risk for Black Patients: Uncovering Potential Sources of Bias and Opportunities for Intervention

What explains differences in average wait time in the emergency department among different racial and ethnic populations: A linear decomposition approach

Objective

Non-Hispanic Black (NHB) and Hispanic/Latino (Hispanic) patients wait longer in the emergency department (ED) to see practitioners when compared with non-Hispanic White (NHW) patients. We investigate factors contributing to longer wait times for NHB and Hispanic patients using a linear decomposition approach.

Methods

This retrospective observational study included patients presenting to one tertiary hospital ED from 2019 to 2021. Median wait times among NHW, NHB, and Hispanic were calculated with multivariable linear regressions. The extent to which demographic, clinical, and hospital factors explained the differences in average wait time among the three groups were analyzed with Blinder‒Oaxaca post-linear decomposition model.

Results

There were 310,253 total patients including 34.7% of NHW, 34.7% of NHB, and 30.6% of Hispanic patients. The median wait time in NHW was 9 min (interquartile range [IQR] 4‒47 min), in NHB was 13 min (IQR 4‒59 min), and in Hispanic was 19 min (IQR 5‒78 min, p < 0.001). The top two contributors of average wait time difference were mode of arrival and triage acuity level. Post-linear decomposition analysis showed that 72.96% of the NHB‒NHW and 87.77% of the Hispanic‒NHW average wait time difference were explained by variables analyzed.

Conclusion

Compared to NHW patients, NHB and Hispanic patients typically experience longer ED wait times, primarily influenced by their mode of arrival and triaged acuity levels. Despite these recognized factors, there remains 12%‒27% unexplained factors at work, such as social determinants of health (including implicit bias and systemic racism) and many other unmeasured confounders, yet to be discovered.

Exploring Prognostic Implications of Race and Ethnicity in Patients With Peripheral Arterial Disease

INTRODUCTION

Significant health inequalities in major adverse limb events exist. Ethnically minoritized groups are more prone to have a major adverse event following peripheral vascular interventions. This systematic review and meta-analysis aimed to describe the postoperative implications of racial and ethnic status on clinical outcomes following vascular interventions for claudication and chronic limb-threatening ischemia.

METHODS

Searches were conducted across seven databases from inception to June 2021 and were updated in October 2022 to identify studies reporting claudication or chronic limb-threatening ischemia in patients who underwent open, endovascular, or hybrid procedures. Studies with documented racial and ethnic status and associated clinical outcomes were selected. Extracted data included demographic and clinical characteristics, vascular interventions, and measured outcomes associated with race or ethnicity. Meta-analyses were performed using random-effect models to report pooled odds ratios (ORs) with 95% confidence intervals (CIs).

RESULTS

Seventeen studies evaluating the impact of Black versus White patients undergoing amputation as a primary intervention were combined in a meta-analysis, revealing that Black patients had a higher incidence of amputations as a primary intervention than White patients (OR: 1.91, 95% CI: 1.61-2.27). Another meta-analysis demonstrated that Black patients had significantly higher rates of amputation after revascularization (OR: 1.56, 95% CI: 1.28-1.89). Furthermore, multiple trends were demonstrated in the secondary outcomes evaluated.

CONCLUSIONS

Our findings suggest that Black patients undergo primary major amputation at a significantly higher rate than White patients, with similar trends seen among Hispanic and First Nations patients. Black patients are also significantly more likely to be subjected to amputation following attempts at revascularization when compared to White patients.

Vascular surgeons are positioned to fight healthcare disparities

Comprehensively managing vascular disease in the United States can seem overwhelming. Vascular surgery providers encounter daily stress-inducing challenges, including caring for sick patients who often, because of healthcare barriers, struggle with access to care, socioeconomic challenges, and a complex medical system. These individuals can present with advanced disease and comorbidities, and many have limited treatment options. Subsequently, it could seem as if the vascular surgeon's efforts have little opportunity to make a difference. This review describes a method to counter this sentiment through directed action, hope, and community building. Vascular surgeons are passionate about what they do and are built to fight healthcare disparities. This review also outlines the reasoning for attempting to create change and one approach to begin making a difference.

Amputation Rates and Associated Social Determinants of Health in the Most Populous US Counties

Importance

Social Determinants of Health (SDOH) have been found to be associated with health outcome disparities in patients with peripheral artery disease (PAD). However, the association of specific components of SDOH and amputation has not been well described.

Objective

To evaluate whether individual components of SDOH and race are associated with amputation rates in the most populous counties of the US.

Design, Setting, and Participants

In this population-based cross-sectional study of the 100 most populous US counties, hospital discharge rates for lower extremity amputation in 2017 were assessed using the Healthcare Cost and Utilization Project State Inpatient Database. Those data were matched with publicly available demographic, hospital, and SDOH data. Data were analyzed July 3, 2022, to March 5, 2023.

Main outcome and Measures

Amputation rates were assessed across all counties. Counties were divided into quartiles based on amputation rates, and baseline characteristics were described. Unadjusted linear regression and multivariable regression analyses were performed to assess associations between county-level amputation and SDOH and demographic factors.

Results

Amputation discharge data were available for 76 of the 100 most populous counties in the United States. Within these counties, 15.3% were African American, 8.6% were Asian, 24.0% were Hispanic, and 49.6% were non-Hispanic White; 13.4% of patients were 65 years or older. Amputation rates varied widely, from 5.5 per 100 000 in quartile 1 to 14.5 per 100 000 in quartile 4. Residents of quartile 4 (vs 1) counties were more likely to be African American (27.0% vs 7.9%, P < .001), have diabetes (10.6% vs 7.9%, P < .001), smoke (16.5% vs 12.5%, P < .001), be unemployed (5.8% vs 4.6%, P = .01), be in poverty (15.8% vs 10.0%, P < .001), be in a single-parent household (41.9% vs 28.6%, P < .001), experience food insecurity (16.6% vs 12.9%, P = .04), or be physically inactive (23.1% vs 17.1%, P < .001). In unadjusted linear regression, higher amputation rates were associated with the prevalence of several health problems, including mental distress (β, 5.25 [95% CI, 3.66-6.85]; P < .001), diabetes (β, 1.73 [95% CI, 1.33-2.15], P < .001), and physical distress (β, 1.23 [95% CI, 0.86-1.61]; P < .001) and SDOHs, including unemployment (β, 1.16 [95% CI, 0.59-1.73]; P = .03), physical inactivity (β, 0.74 [95% CI, 0.57-0.90]; P < .001), smoking, (β, 0.69 [95% CI, 0.46-0.92]; P = .002), higher homicide rate (β, 0.61 [95% CI, 0.45-0.77]; P < .001), food insecurity (β, 0.51 [95% CI, 0.30-0.72]; P = .04), and poverty (β, 0.46 [95% CI, 0.32-0.60]; P < .001). Multivariable regression analysis found that county-level rates of physical distress (β, 0.84 [95% CI, 0.16-1.53]; P = .03), Black and White racial segregation (β, 0.12 [95% CI, 0.06-0.17]; P < .001), and population percentage of African American race (β, 0.06 [95% CI, 0.00-0.12]; P = .03) were associated with amputation rate.

Conclusions and Relevance

Social determinants of health provide a framework by which the associations of environmental factors with amputation rates can be quantified and potentially used to guide interventions at the local level.

Underlying Bias in the Treatment of Pancreatic Cancer: Minorities Treated at the Same Facilities are Less Likely to Receive Neoadjuvant Therapy

OBJECTIVE

To identify disparities in access to NAT for PDAC at the prehospital and intrahospital phases of care.

SUMMARY OF BACKGROUND DATA

Delivery of NAT in PDAC is susceptible to disparities in access. There are limited data that accurately locate the etiology of disparities at the prehospital and intrahospital phases of care.

METHODS

Retrospective cohort of patients ≥18 years old with clinical stage I-II PDAC from the 2010-2016 National Cancer Database. Multiple logistic regression was used to assess 2 sequential outcomes: (1) access to an NAT facility (prehospital phase) and (2) receipt of NAT at an NAT facility (intrahospital phase).

RESULTS

A total of 36,208 patients were included for analysis in the prehospital phase of care. Higher education, longer travel distances, being treated at academic/research or integrated network cancer programs, and more recent year of diagnosis were independently associated with receipt of treatment at an NAT facility. All patients treated at NAT facilities (31,099) were included for the second analysis. Higher education level and receiving care at an academic/research facility were independently associated with increased receipt of NAT. NonBlack racial minorities (including American Indian, Asian, Pacific Islanders), being Hispanic, being uninsured, and having Medicaid insurance were associated with decreased receipt of NAT at NAT facilities.

CONCLUSIONS

Non-Black racial minorities and Hispanic patients were less likely to receive NAT at NAT facilities compared to White and non-Hispanic patients, respectively. Discrepancies in administration of NAT while being treated at NAT facilities exist and warrant urgent further investigation.

Racial, ethnic, and socioeconomic inequities in amputation risk for patients with peripheral artery disease and diabetes

Peripheral artery disease and diabetes are highly prevalent diseases and the leading cause of limb loss. Despite advances in medical and surgical techniques, there are stark differences in delivery and outcomes of lower extremity amputation among populations when stratified by race, ethnicity, and socioeconomic status. We reviewed studies from the last 2 decades (1999-2022) to provide a comprehensive assessment of the current impact of disparities on the risk for, and management of, lower extremity amputation and offer action items that can optimize health outcomes.

The Relationship Between Peripheral Arterial Disease Severity and Socioeconomic Status

BACKGROUND

Although socioeconomic disparities in outcomes of peripheral artery disease (PAD) have been well studied, little is known about relationship between severity of PAD and socioeconomic status. The objective of this study was to examine this relationship.

METHODS

Patients who had operations for severe PAD (rest pain or tissue loss) were identified in the National Inpatient Sample, 2005-2014. They were stratified by the median household income (MHI) quartiles of their residential ZIP codes. Other characteristics such as race/ethnicity and insurance type were extracted. Factors associated with more severe disease (tissue loss) were evaluated using multivariable regression analyses.

RESULTS

There were 765,175 patients identified; 34% in the first MHI quartile and 18% in the fourth MHI quartile. Compared to patients in the first quartile, those in the fourth quartile were more likely White (69% vs. 42%, P < 0.001), more likely ≥65 years old (75% vs. 62%, P < 0.001), and were less likely to undergo amputations (25% vs. 34%, P < 0.001). After adjusting for patient characteristics, the fourth quartile was associated with more severe disease [Odds ratio: 1.19, 95% confidence interval (CI): 1.11-1.27] compared to the first quartile.

CONCLUSIONS

While higher MHI was associated with higher PAD severity, patients with high MHI were less likely to undergo amputations indicating a disparity in the choice of treatment for PAD. Increased efforts are necessary to reduce socioeconomic disparities in the treatment of severe PAD.

The shifting care and outcomes for patients with endangered limbs - Critical limb ischemia (SCOPE-CLI) registry overview of study design and rationale

BACKGROUND

Critical limb ischemia (CLI), the most severe form of peripheral artery disease, is associated with pain, poor wound healing, high rates of amputation, and mortality (>20% at 1 year). Little is known about the processes of care, patients' preferences, or outcomes, as seen from patients' perspectives. The SCOPE-CLI study was co-designed with patients to holistically document patient characteristics, treatment preferences, patterns of care, and patient-centered outcomes for CLI.

METHODS

This 11-center prospective observational registry will enroll and interview 816 patients from multispecialty, interdisciplinary vascular centers in the United States and Australia. Patients will be followed up at 1, 2, 6, and 12 months regarding their psychosocial factors and health status. Hospitalizations, interventions, and outcomes will be captured for 12 months with vital status extending to 5 years. Pilot data were collected between January and July of 2021 from 3 centers.

RESULTS

A total of 70 patients have been enrolled. The mean age was 68.4 ± 11.3 years, 31.4% were female, and 20.0% were African American.

CONCLUSIONS

SCOPE-CLI is uniquely co-designed with patients who have CLI to capture the care experiences, treatment preferences, and health status outcomes of this vulnerable population and will provide much needed information to understand and address gaps in the quality of CLI care and outcomes.ClinicalTrials.gov identifier (NCT Number): NCT04710563 https://clinicaltrials.gov/ct2/show/NCT04710563.

Sex-based differences in loss of independence after lower extremity bypass surgery

INTRODUCTION

This study analyzes sex-based differences in the risk of discharge to a nonhome facility (loss of independence) after lower extremity revascularization and resultant outcomes.

METHODS

Data from the NSQIP database for years 2015-2017 was utilized to assess sex-based differences in loss of independence and associated unplanned readmission and 30-day amputation using chi-square, student t-test, and multivariate logistic regression analyses where appropriate.

RESULTS

There was increased loss of independence in women (34.9% vs. 26.1 %, p < .01) and associated increase in unplanned readmission (18.4% vs. 13.6 %, p = .01) and length of stay (12.1 days vs 6.5 days, p < .01). Endovascular revascularization was associated with decreased likelihood of loss of independence (OR 0.43, CI 0.36-0.50).

CONCLUSION

Loss of independence after lower extremity bypass surgery affects women more than men and it is associated with worse postoperative outcomes.

Contribution of unequal new patient referrals to female surgeon under-employment

BACKGROUND

The literature shows that female surgeons have lower operative volumes than male surgeons. Since volume is dependent on new patient referrals for most surgeons, inequities in referrals may contribute to this employment disparity.

METHODS

Using 1997-2018 data from a large medical center, we examined the number of new patient referrals for surgeons. Multivariate linear analysis was performed, adjusting for surgeon race, calendar year, seniority, and clinical subspecialty.

RESULTS

A total of 121 surgeons across 12,410 surgeon-months were included. Overall, surgeons had a median of 14 new patient referrals per month (interquartile range (IQR) = 7, 27). On adjusted analysis, female surgeons saw 5.4 fewer new patient referrals per month (95% CI -6.4 to -4.5).

CONCLUSION

Female surgeons, with equal training and seniority, received fewer new patient referrals than their male peers, and this may contribute to female surgeon under-employment. Surgeon gender may be one of the factors contributing to this differential referral pattern.

The impact of race on choice of location for elective surgical care in New York city

BACKGROUND

The "white-flight" phenomenon of the mid-20th century contributed to the perpetuation of residential segregation in American society. In light of recent reports of racial segregation in our healthcare system, could a contemporary "white-flight" phenomenon also exist?

METHODS

The New York Statewide Planning and Research Cooperative System was used to identify all Manhattan and Bronx residents of New York city who underwent elective cardiothoracic, colorectal, general, and vascular surgeries from 2010 to 2016. Primary outcome was borough of surgical care in relation to patient's home borough. Multivariable analyses were performed.

RESULTS

White patients who reside in the Bronx are significantly more likely than racial minorities to travel into Manhattan for elective surgical care, and these differences persist across different insurance types, including Medicare.

CONCLUSIONS

Marked race-based differences in choice of location for elective surgical care exist in New York city. If left unchecked, these differences can contribute to furthering racial segregation within our healthcare system.

Perfusion Assessment in Critical Limb Ischemia: Principles for Understanding and the Development of Evidence and Evaluation of Devices: A Scientific Statement From the American Heart Association

There are >12 million patients with peripheral artery disease in the United States. The most severe form of peripheral artery disease is critical limb ischemia (CLI). The diagnosis and management of CLI is often challenging. Ethnic differences in comorbidities and presentation of CLI exist. Compared with white patients, black and Hispanic patients have higher prevalence rates of diabetes mellitus and chronic renal disease and are more likely to present with gangrene, whereas white patients are more likely to present with ulcers and rest pain. A thorough evaluation of limb perfusion is important in the diagnosis of CLI because it can not only enable timely diagnosis but also reduce unnecessary invasive procedures in patients with adequate blood flow or among those with other causes for ulcers, including venous, neuropathic, or pressure changes. This scientific statement discusses the current tests and technologies for noninvasive assessment of limb perfusion, including the ankle-brachial index, toe-brachial index, and other perfusion technologies. In addition, limitations of the current technologies along with opportunities for improvement, research, and reducing disparities in health care for patients with CLI are discussed.

Does the Day of the Week Predict a Cesarean Section? A Statewide Analysis

BACKGROUND

Although guidelines for clinical indications of cesarean sections (CS) exist, nonclinical factors may affect CS practices. We hypothesize that CS rates vary by day of the week.

METHODS

An analysis of the Office of Statewide Health Planning and Development database for California from 2006 to 2010 was performed. All patients admitted to a teaching or nonteaching hospital for attempted vaginal delivery were included. Patients who died within 24 h of admission were excluded. Weekend days were defined as Saturday and Sunday, and weekdays were defined as Monday to Friday. The primary outcome was CS versus vaginal delivery. Multivariable analysis was performed, adjusting for patient demographics, clinical factors, and system variables.

RESULTS

A total of 1,855,675 women were included. The overall CS rate was 9.02%. On unadjusted analysis, CS rates were significantly lower on weekends versus weekdays (6.65% versus 9.58%, P < 0.001). On adjusted analysis, women were 27% less likely to have a CS on weekends than on weekdays (odds ratio [OR] 0.73, 95% confidence interval [CI] 0.71-0.75, P < 0.001). In addition, Hispanic ethnicity and delivery in teaching hospitals were associated with a decreased likelihood of CS (OR 0.91, 95% CI 0.86-0.96, P = 0.01; OR 0.80, 95% CI 0.69-0.93, P < 0.001, respectively).

CONCLUSIONS

CS rates are significantly decreased on weekends relative to weekdays, even when controlling for patient, hospital, and system factors.

Do Social Determinants Define "Too Sick" to Transplant in Patients With End-stage Liver Disease?

BACKGROUND

Delisting for being "too sick" to be transplanted is subjective. Previous work has demonstrated that the mortality of patients delisted for "too sick" is unexpectedly low. Transplant centers use their best clinical judgment for determining "too sick," but it is unclear how social determinants influence decisions to delist for "too sick." We hypothesized that social determinants and Donor Service Area (DSA) characteristics may be associated with determination of "too sick" to transplant.

METHODS

Data were obtained from the Scientific Registry of Transplant Recipients for adults listed and removed from the liver transplant waitlist from 2002 to 2017. Patients were included if delisted for "too sick." Our primary outcome was Model for End-Stage Liver Disease (MELD) score at waitlist removal for "too sick." Regression assessed the association between social determinants and MELD at removal for "too sick."

RESULTS

We included 5250 delisted for "too sick" at 127 centers, in 53 DSAs, over 16 years. The mean MELD at delisting for "too sick" was 25.8 (SD ± 11.2). On adjusted analysis, social determinants including age, race, sex, and education predicted the MELD at delisting for "too sick" (P < 0.05).

CONCLUSIONS

There is variation in delisting MELD for "too sick" score across DSA and time. While social determinants at the patient and system level are associated with delisting practices, the interplay of these variables warrants additional research. In addition, center outcome reports should include waitlist removal rate for "too sick" and waitlist death ratios, so waitlist management practice at individual centers can be monitored.