Lack of differential impact of del17p on survival in African Americans compared with White patients with multiple myeloma: a VA study

Real-world multiple myeloma risk factors and outcomes by non-Hispanic Black/African American and non- Hispanic White race/ethnicity in the United States

Examination of the impact of race and ethnicity on multiple myeloma (MM) outcomes has yielded inconsistent results. This retrospective, real-world (RW) study describes patient, disease, and treatment characteristics (and associations with survival outcomes) among newly diagnosed MM patients of non-Hispanic (NH) Black/African American (AA) and NH White race/ethnicity in the US. We included patients from the nationwide Flatiron Health electronic health record-derived de-identified database who initiated first line of therapy (LOT) for MM between January 1, 2016 and March 31, 2022. Of 4,614 patients in our study cohort, 23.3% were NH Black/AA. Non-Hispanic Black/AA patients were younger than NH White patients at diagnosis (median 68 vs. 71 years) and more likely to be female (53.4% vs. 43.5%). Rates of high-risk cytogenetics and 1q21+ were similar between races/ethnicities. The most common primary regimen used was lenalidomide-bortezomib-dexamethasone (50.1% of NH Black/AA and 48.1% of NH White patients). Receipt of stem cell transplantation during first LOT was less common among NH Black/AA (16.5%) than NH White (21.9%) patients. Unadjusted RW progression-free survival (rwPFS) and overall survival (rwOS) were similar between races/ethnicities. After multivariable adjustment, NH Black/AA race/ethnicity was associated with slightly inferior rwPFS (hazard ratio [HR]=1.13; 95% confidence interval [CI]: 1.01-1.27). The difference in rwOS (HR=1.12; 95% CI: 0.98-1.28) was not statistically significant. In general, associations between risk factors for rwPFS and rwOS were consistent between races/ethnicities. Findings from this analysis help to inform clinicians about the impact of race/ethnicity on MM treatment paradigms and outcomes in the US.

Overall Survival in Patients With Multiple Myeloma in the U.S.: A Systematic Literature Review of Racial Disparities

Multiple myeloma (MM) accounts for 10% of hematologic cancers in the U.S.; however, incidence and mortality occur disproportionately between racial groups in real-world settings. Our study's objective was to systematically characterize the disparities in overall survival (OS) among Black and White patients with MM in the US using real-world evidence studies. A systematic literature review was undertaken by searching Embase and MEDLINE for observational studies conducted in the US, published between January 1, 2015 and October 25, 2021, and reporting OS for Black and White patients with MM. Records were reviewed by 2 independent researchers. OS data were extracted as hazard ratios (HR), median survival, or %, with methods of adjustment, as reported. Evidence quality was assessed by data source, population, and variables for which HRs for risk of death were adjusted. We included 33 US studies comprising 410,086 patients (21.5% Black; 78.5% White) with MM. Receipt of treatment varied; however, most studies reported that patients either underwent stem cell transplant and/or received systemic therapy. HRs from 9 studies were considered "high quality" by comparing nationally representative, generalizable cohorts and adjusting for key prognostic, treatment, and/or socioeconomic factors. After adjustment, these data suggested that Black patients exhibit similar or superior survival outcomes compared with their White counterparts. When data are adjusted for important confounders, Black patients exhibit better or equal survival to White patients, indicating that similarities in patient populations and equal access to treatment can bridge the disparity in patient outcomes between races.

Racial differences in treatment and survival among older patients with multiple myeloma

BACKGROUND

Treatments for multiple myeloma (MM) have evolved over time and improved MM survival. While racial differences in MM treatment and prognosis between non-Hispanic African American (NHAA) and non-Hispanic White (NHW) patients are well-established, it is unclear whether they have persisted after the introduction of novel agents.

METHODS

Using the Surveillance, Epidemiology, and End Results-Medicare linked database, our study investigated racial difference in the receipt of treatment within 1 year following diagnosis and assessed survival outcomes among Medicare beneficiaries (≥66 years) diagnosed with MM from 2007 to 2017. We applied multivariable Cox proportional hazards models to estimate the association between race and survival and presented hazard ratios (HRs).

RESULTS

Of 2094 NHAA and 11,983 NHW older patients with MM, 59.5% and 64.8% received treatment during the first year, respectively. Discrepancy in the proportion of patients receiving treatment between the two groups increased from 2.9% in 2007 to 2009 to 6.9% in 2014-2017. After controlling for relevant factors, patients who received treatment within the first year had lower mortality than those who did not (HR = 0.90, 95% confidence interval [CI]: 0.86-0.94). NHAA patients had a lower probability to receive treatments during the first year than NHW patients (HR = 0.91, 95% CI: 0.85-0.97) but had lower mortality (HR = 0.94, 95% CI: 0.88-1.00). The lower mortality was only observed among patients who received no treatment (HR = 0.84, 95% CI: 0.77-0.93); NHAA and NHW patients who received treatment had similar survival (p = 0.63).

CONCLUSIONS

The increasing racial disparity in treatment utilization over time is concerning. Efforts are needed to eliminate the barriers of receiving treatment.

Culturally Responsive Care Delivery in Oncology: The Example of Multiple Myeloma

Multiple myeloma (MM) represents ∼1% of all cancers and is the second most common hematologic malignancy worldwide. The incidence of MM is at least two times higher in Blacks/African Americans compared with their White counterparts, and Hispanics/Latinxs are among the youngest patients diagnosed with the disease. Recent advances in available treatments for MM have demonstrated significant improvement in survival outcomes; however, patients from non-White racial/ethnic groups clinically benefit less due to multiple factors including access to care, socioeconomic status, medical mistrust, underutilization of novel therapies, and exclusion from clinical trials. Health inequities in disease characteristics and risk factors based on race also contribute to inequities in outcomes. In this review, we highlight racial/ethnic factors as well as structural barriers attributed to variations in MM epidemiology and management. We focus on three populations-Black/African American, Hispanic/Latinx, and American Indian/Alaska Native-and review factors that healthcare professionals may consider when treating patients of color. We offer tangible advice for healthcare professionals on how to incorporate cultural humility into their practice by following the five key steps: establishing trust, respecting cultural diversity, undergoing cross-cultural training, counseling patients on appropriate available clinical trial options, and connecting patients to community resources. The outlined recommendations will help the medical community to better understand and apply the important concept of cultural humility into their practice to provide the best care for all their patients, regardless of race/ethnicity.

Under-representation of black patients with multiple myeloma in studies supporting International Myeloma Working Group guidelines

INTRODUCTION

Multiple myeloma (MM) is more common in Black persons when compared to non-Hispanic White persons. The International Myeloma Working Group (IMWG) provides consensus for diagnosis and treatment of MM. Our study aimed to assess the racial composition of supporting studies used by IMWG to publish their guidelines METHODS: We performed a cross sectional study that included all IMWG publications up to July 2022. References cited in each publication were reviewed. Review articles, comments, editorials, case reports, and animal-based studies were excluded.

RESULTS

A total of 59 IMWG publications with 3956 references were reviewed. Final analysis included 2047 references of which 39 % (n = 804) were clinical trials, 35 % (n = 712) were observational studies, 20 % (n = 401) were diagnostic and or genetic testing-based studies, 3 % (n = 65) were population-based analysis and 3 % (n = 65) classified as others. Only 10.4 % of included references (n = 213/2047) reported race/ethnicity of studied patients. The total number of patients in all referenced studies were 5,747,920, only 2.6 % (n = 150,790) black patients. Of the trials referenced and done exclusively in the US, 41 out of 282 (14.5 %) reported race/ethnicity with a total number of patients of 38,050 of which 2493 (6.5 %) were black patients.

CONCLUSION

IMWG guidelines were based mainly on studies that did not include enough Black patients. Guidelines should consider inclusion of observational, diagnostic and population-based studies with more black patients to allow for better reflection of disease prevalence, clinical characteristics and/or outcomes.

Multiple Myeloma for the Primary Care Provider: A Practical Review to Promote Earlier Diagnosis Among Diverse Populations

Multiple myeloma is the second most common hematologic malignancy in the United States and the most common hematologic malignancy among Blacks/African Americans. Delay in diagnosis is common and has been associated with inferior disease-free survival and increased rates of myeloma-related complications. Despite a roughly 2-times higher risk of multiple myeloma, diagnostic delay appears more common, and improvements in 5-year survival rates have been slower among Blacks/African Americans than their White counterparts. When patient symptoms and basic laboratory findings are suggestive of multiple myeloma, the primary care provider should initiate extended laboratory work-up that includes serum protein electrophoresis, serum immunoglobulin free light chain assay, and serum immunofixation. Heightened awareness within high-risk populations such as Blacks/African Americans may help to eliminate racial disparities in the diagnosis and treatment of multiple myeloma.