More than treatment refusal: a National Cancer Database analysis of adjuvant treatment refusal and racial survival disparities among women with endometrial cancer

The Diverse Aspects of Uterine Serous Cancer: an NCI workshop on the status of and opportunities for advancement of research

The marked increase in the incidence and mortality associated with endometrial cancer over the past 2 decades is driven in part by rising rates of higher-grade, more aggressive endometrial cancers with variations in TP53, uterine serous cancers and their dedifferentiated component, uterine carcinosarcomas. Uterine serous cancer rates have been increasing among all racial and ethnic groups, with higher rates of this aggressive uterine cancer in Black women. The National Cancer Institute hosted a workshop in June 2023 to examine the diverse aspects of uterine serous cancers across epidemiology, biology, and molecular genetics and to advance knowledge from basic to preclinical and translational efforts. Key stakeholders, including basic scientists, clinical investigators, and patient advocates, came together to identify critical research gaps that, when addressed, would facilitate more comprehensive and rapid progress in understanding and ultimately treating uterine serous cancers across all patients. The National Cancer Institute released a supplemental funding opportunity (NOT-CA-24-044) in spring 2024 to facilitate rapid translation of these recommendations.

Disparities in consent to adjuvant radiotherapy in primary glioblastoma: a population-based study

BACKGROUND

Despite adjuvant external beam radiation therapy (EBRT) has long been the standard treatment for glioblastoma (GBM), a significant subset of patients chooses to refuse it. We aimed to investigate the factors influencing EBRT refusal in GBM.

RESEARCH DESIGN AND METHODS

Patients with GBM were identified from the Surveillance, Epidemiology, and End Results (SEER) database. Both univariable and multivariable logistic regression analyses were employed to evaluate the adjusted odds ratios (aOR) for the refusal of EBRT in relation to various clinical and demographic characteristics.

RESULTS

Among the 29,994 patients analyzed, 675 (2.3%) opted to refuse adjuvant EBRT. Patients aged ≥ 55 years (55-64: aOR 1.63, 95% CI 1.04-2.61, p = 0.03; 65-74: aOR 1.80, 95% CI 1.17-2.87, p = 0.009; 75+: aOR 2.01, 95% CI 1.28-3.24, p = 0.002), being single (aOR 1.68, 95% CI 1.19-2.35, p = 0.002), with a household income of $55,000 to $64,999 (aOR 1.94, 95% CI 1.24-3.07, p = 0.004), and not undergoing chemotherapy (aOR 114, 95% CI 80.2-170.2, p < 0.001) had significantly higher odds of refusing adjuvant EBRT.

CONCLUSIONS

This study underscores the necessity for targeted communication strategies by physicians regarding the benefits of adjuvant EBRT.

Racial and ethnic disparities in reproductive medicine in the United States: a narrative review of contemporary high-quality evidence

There has been increasing debate around how or if race and ethnicity should be used in medical research-including the conceptualization of race as a biological entity, a social construct, or a proxy for racism. The objectives of this narrative review are to identify and synthesize reported racial and ethnic inequalities in obstetrics and gynecology (ob/gyn) and develop informed recommendations for racial and ethnic inequity research in ob/gyn. A reproducible search of the 8 highest impact ob/gyn journals was conducted. Articles published between January 1, 2010 and June 30, 2023 containing keywords related to racial and ethnic disparities, bias, prejudice, inequalities, and inequities were included (n=318). Data were abstracted and summarized into 4 themes: 1) access to care, 2) adherence to national guidelines, 3) clinical outcomes, and 4) clinical trial diversity. Research related to each theme was organized topically under the headings i) obstetrics, ii) reproductive medicine, iii) gynecologic cancer, and iv) other. Additionally, interactive tables were developed. These include data on study timeline, population, location, and results for every article. The tables enable readers to filter by journal, publication year, race and ethnicity, and topic. Numerous studies identified adverse reproductive outcomes among racial and ethnic minorities as compared to white patients, which persist despite adjusting for differential access to care, socioeconomic or lifestyle factors, and clinical characteristics. These include higher maternal morbidity and mortality among Black and Hispanic/Latinx patients; reduced success during fertility treatments for Black, Hispanic/Latinx, and Asian patients; and lower survival rates and lower likelihood of receiving guideline concordant care for gynecological cancers for non-White patients. We conclude that many racial and ethnic inequities in ob/gyn cannot be fully attributed to patient characteristics or access to care. Research focused on explaining these disparities based on biological differences incorrectly reinforces the notion of race as a biological trait. More research that deconstructs race and assesses efficacy of interventions to reduce these disparities is needed.

Refining research on access to gynecologic cancer care: The DIMeS framework

BACKGROUND

Despite its importance, there is no consensus definition of access to care, and several fundamental philosophical questions about access remain unanswered. Lack of clarity impedes interventional research designed to develop and test methods of correcting barriers to access. To help remedy this problem, we propose a conceptual framework to help guide empirical research about access to gynecologic cancer care.

METHODS

Relevant philosophical and empirical literature was reviewed and analyzed to highlight key elements needed to refine research on access to care.

RESULTS

The DIMeS framework involves 1) choice and justification of a Definition of access to cancer care that will guide research; 2) Identification of essential gynecologic cancer care services for which access disparities are ethically unacceptable; 3) quantitative MEasurement of specific parameters that affect access to care; and 4) Selection of a target threshold on measured parameters above which access is acceptable.

CONCLUSIONS

The DIMeS framework provides clarity and reproducibility for investigators seeking to develop and test interventions to improve cancer health equity. This framework should be considered for use in research on access to gynecologic cancer care.

Five-Year Relative Survival Rates of Women Diagnosed with Uterine Cancer by County-Level Socioeconomic Status Overall and across Histology and Race/Ethnicity

Understanding socioeconomic factors contributing to uterine cancer survival disparities is crucial, especially given the increasing incidence of uterine cancer, which disproportionately impacts racial/ethnic groups. We investigated the impact of county-level socioeconomic factors on five-year survival rates of uterine cancer overall and by histology across race/ethnicity. We included 333,013 women aged ≥ 30 years with microscopically confirmed uterine cancers (2000-2018) from the Surveillance, Epidemiology, and End Results 22 database followed through 2019. Age-standardized five-year relative survival rates were compared within race/ethnicity and histology, examining the differences across tertiles of county-level percent (%) Collapse

Key Words

• five-year survival
• histologic subtype
• race/ethnic disparity
• race/ethnicity
• socioeconomic status
• uterine cancer

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MESH Headings Collapse

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Affiliation(s)

Akemi T. Wijayabahu Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA; (J.K.M.-A.); (M.S.S.); (M.A.C.)
Jennifer K. McGee-Avila Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA; (J.K.M.-A.); (M.S.S.); (M.A.C.)
Meredith S. Shiels Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA; (J.K.M.-A.); (M.S.S.); (M.A.C.)
Alfonsus Adrian H. Harsono Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL 35233, USA; (A.A.H.H.); (R.C.A.)
Rebecca C. Arend Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL 35233, USA; (A.A.H.H.); (R.C.A.)
Megan A. Clarke Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA; (J.K.M.-A.); (M.S.S.); (M.A.C.)

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Exploring the Potential Link between PFAS Exposure and Endometrial Cancer: A Review of Environmental and Sociodemographic Factors

This exploratory narrative review paper delves into the intricate interplay between per- and polyfluoroalkyl substances (PFAS) exposure, sociodemographic factors, and the influence of stressors in the context of endometrial cancer. PFAS, ubiquitous environmental contaminants notorious for their persistence in the ecosystem, have garnered attention for their potential to disrupt endocrine systems and provoke immune responses. We comprehensively examine the various sources of PFAS exposure, encompassing household items, water, air, and soil, thus shedding light on the multifaceted routes through which individuals encounter these compounds. Furthermore, we explore the influence of sociodemographic factors, such as income, education, occupation, ethnicity/race, and geographical location and their relationship to endometrial cancer risk. We also investigated the role of stress on PFAS exposure and endometrial cancer risk. The results revealed a significant impact of sociodemographic factors on both PFAS levels and endometrial cancer risk. Stress emerged as a notable contributing factor influencing PFAS exposure and the development of endometrial cancer, further emphasizing the importance of stress management practices for overall well-being. By synthesizing evidence from diverse fields, this review underscores the need for interdisciplinary research and targeted interventions to comprehensively address the complex relationship between PFAS, sociodemographic factors, stressors, and endometrial cancer.

Racioethnic Disparities in Endometrial Cancer Outcomes

Black women are twice as likely to die from endometrial cancer (EC) compared with white women. This represents one of the worst racioethnic disparities amongst all cancers globally. Compared with white women, black women are more likely to be diagnosed with advanced EC, have more barriers to accessing care and experience increased delays in obtaining an EC diagnosis and commencing treatment. Histological and molecular differences place black women at higher risk of being diagnosed with more aggressive EC subtypes that carry less favourable outcomes. Furthermore, EC diagnostic pathways are less reliable in black women, and black women are less likely to receive evidence-based treatment for EC. This racioethnic disparity in EC outcomes exists both in the UK and US, despite differences in healthcare systems. This review methodically describes the key factors along the patient journey that contribute to the disparity in black women and proposes multifaceted approaches to lessen these gaps.

Reducing health disparities in endometrial cancer care in 2024

PURPOSE OF REVIEW

To summarize the most recent publications explaining disparities among patients diagnosed with endometrial cancer and identify areas of improvement.

RECENT FINDINGS

Racial disparities in endometrial cancer care have been identified along the cancer continuum including risk, diagnosis, access to treatment, and overall survival. The mortality gap in endometrial cancer is one of the top five widest Black-White mortality gaps among all cancer diagnoses in the United States. Many publications have demonstrated that the disparities exist, the aim of this review is to identify actionable areas of improvement. To mitigate racial disparities, we must acknowledge that Black patients are at higher risk of high-risk subtypes of endometrial cancer, and their presentation can vary from what is considered typical for the most common type of endometrial cancer. We must address that practice recommendations for diagnosis may not be generalizable to all races and ethnicities, and that racism has an impact on how providers approach a work-up for Black vs. White patients. Finally, we must improve access to appropriate treatment by steadfastly adhering to recommended practice guidelines regardless of race/ethnicity and improving efforts to enroll a diverse patient population to clinical trials.

SUMMARY

In this review, we sought to identify specific and actionable areas of improvement to reduce racial disparities in endometrial cancer care.

Risk Factors and Survival Impact Associated With Documentation of Radiation Therapy Refusal in Patients With Gynecologic Cancer

PURPOSE

Radiation therapy (RT) refusal is known to have deleterious effects on survival for multiple cancer types. Factors associated with RT refusal by patients with gynecologic malignancies have not been well described. This study aimed to examine factors associated with and the survival impact of documented RT refusal among patients with gynecologic cancers.

METHODS AND MATERIALS

This study analyzed data from the National Cancer Database (NCDB) of patients with gynecologic cancers diagnosed between 2004 and 2020. Patients were included if they had complete survival data and a documented RT recommendation by their treating physician in the NCDB. Patients coded as received RT were compared with those coded as refused RT in the NCDB using a multivariate log binomial regression with robust variance to yield incidence rate ratios (IRR). Overall survival was analyzed using a multivariate (MV) Cox proportional hazards model to yield hazard ratios.

RESULTS

This study identified 209,976 patients. A total of 5.75% (n = 12,081) patients were coded as refusing RT. Multivariable IRR showed that documentation of RT refusal was positively associated with older age (MV IRR, 1.04; 95% CI, 1.041-1.045), Native Hawaiian Pacific Islander race (1.72 [1.27-2.32]), and increased morbidity (score = 1: 1.06 [1.02-1.11]; score = 2: 1.20 [1.12-1.29]; score ≥3: 1.26 [1.14-1.38]). Negative associations were seen with Hispanic ethnicity (0.74 [0.67-0.80]), having insurance (0.58 [0.53-0.63]), and annual income >$74,063 (0.85 [0.81-0.90]). During the 16-year period, a statistically significant test for trend (P = .001) for increasing RT refusal was noted. RT refusal was associated with a significantly higher risk of death (MV hazard ratio, 1.59 [1.55-1.63]).

CONCLUSIONS

For patients with gynecologic malignancies diagnosed from 2004 to 2020, an increase in documented RT refusal is associated with decreased overall survival in all disease types. Targeted interventions aimed at mitigating potential sociodemographic barriers to receipt of RT are warranted.

Persistent racial disparities in refusal of resection in non-small cell lung cancer patients at high-volume and Black-serving institutions

BACKGROUND

Surgical resection is the standard of care for early-stage non-small cell lung cancer. Black patients have higher surgical refusal rates than White patients. We evaluated factors associated with the refusal of resection and subsequent non-small cell lung cancer outcomes.

METHODS

We identified patients with non-small cell lung cancer stages IA to IIIA eligible for surgical resection (lobectomy or pneumonectomy) listed between 2004 and 2017 in the National Cancer Database. We stratified hospitals by the proportion of Black patients served and lung cancer resection volume. We used multivariable regression models to identify factors associated with refusal of resection and assessed 5-year mortality using Kaplan-Meier analysis and Cox proportional hazard modeling.

RESULTS

Of 221,396 patients identified, 7,753 (3.5%) refused surgery. Black race was associated with increased refusal (adjusted odds ratio 2.06, 95% confidence interval 1.90-2.22). Compared to White race, Black race was associated with increased refusal across the highest (adjusted odds ratio 2.29, 95% confidence interval 1.94-2.54), intermediate (adjusted odds ratio 2.05, 95% confidence interval 1.78-2.37), and lowest (adjusted odds ratio 1.77, 95% confidence interval 1.58-1.99) volume tertiles. Similarly, Black race was associated with increased refusal across the highest (adjusted odds ratio 1.97, 95% confidence interval 1.78-2.17), intermediate (adjusted odds ratio 2.08, 95% confidence interval 1.80-2.40), and lowest (adjusted odds ratio 1.53, 95% confidence interval 1.13-2.06) Black-serving tertiles. However, surgical resection yielded similar 5-year survival for Black and White patients.

CONCLUSION

Racial disparities in non-small cell lung cancer surgery refusal persist regardless of hospital volume or proportion of Black patients served. These findings suggest that a better understanding of patient and patient-provider level interventions could facilitate a better understanding of treatment decision-making.

Alarming trends and disparities in high-risk endometrial cancer

PURPOSE OF REVIEW

To summarize the most recent publications highlighting the trends and disparities among patients diagnosed with high-risk endometrial cancer.

RECENT FINDINGS

Endometrial cancer mortality continues to rise, driven by the increasing incidence of high-risk histologic subtypes that accounts for a disproportionate number of endometrial cancer deaths. The lack of progress made in endometrial cancer treatment, particularly of high-risk histologic subtypes, disproportionately affects black women who are more likely to be diagnosed with these aggressive tumor types. Even when accounting for high-risk histology, various factors across the spectrum of care may influence the survival disparities between black and white women, including timely access to guideline-concordant care, clinical trial enrollment, and systemic racism that impacts cancer outcomes.

SUMMARY

In this review, we highlight the disproportionate impact of worsening endometrial cancer mortality and healthcare inequalities contributing to the endometrial cancer survival disparity between black and white women.

Racial and ethnic disparities in readmission risk following the surgical management of endometrial cancer

OBJECTIVE

Most women diagnosed with endometrial cancer undergo primary surgical management with hysterectomy. Although racial disparities in readmission risk following hysterectomy for non-cancerous conditions have been reported, data among women with endometrial cancer are absent. This study evaluates racial differences in readmission risk among women undergoing endometrial cancer-related hysterectomy.

METHODS

In the National Cancer Database, women who underwent surgical management for endometrial cancer from 2004 to 2018 were identified. Readmission and minimally invasive hysterectomy (MIH) proportions were plotted according to year of diagnosis and race/ethnicity. Multivariable logistic regression models were used to estimate adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for associations between readmission risk and epidemiological, facility, tumor, and surgical characteristics. A base model was sequentially adjusted to incorporate significant covariates.

RESULTS

There were 350,631 patients included in the study. The proportion of MIH increased among all race/ethnicities over the study period; however, MIH rates were lower among Black women. Readmission proportions were 2.7% among White, 4.2% among Black, 2.9% among Hispanic, 2.4% among Asian, 2.1% among American Indian/Alaska Native, and 3.1% among Native Hawaiian/Pacific Islander women. In the fully adjusted model incorporating surgical approach, Black women (OR: 1.20, 95% CI = 1.13, 1.28) and Native Hawaiian/Pacific Islander women (OR: 1.54, 95% CI = 1.09, 2.18) were more commonly readmitted compared to White women.

CONCLUSIONS

In this study, Black and Native Hawaiian/Pacific Islander women with endometrial cancer had significantly higher readmission risk than White women. Optimizing perioperative care for minority women is an essential component of overcoming racially disparate endometrial cancer outcomes.