Status Quo may Explain Racial Differences in Childhood Cancer Survival Rates

by Rishika Gupta on  August 20, 2018 at 10:20 PM Research News
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New insights into racial differences made by childhood cancer itself are being studied in this study. The findings of this study are published in the CANCER journal.
Status Quo may Explain Racial Differences in Childhood Cancer Survival Rates
Status Quo may Explain Racial Differences in Childhood Cancer Survival Rates

For many childhood cancers, survival is lower in black and Hispanic patients compared with non-Hispanic white patients. Rebecca Kehm, PhD, and her colleagues at the University of Minnesota School of Public Health and the Masonic Cancer Center set out to investigate whether racial and ethnic disparities in childhood cancer survival are attributed to underlying differences in socioeconomic status--one's social and economic position in relation to others based on income, education, and occupation.

For the study, the team examined population-based cancer survival data from the Surveillance, Epidemiology, and End Results database for black, white, and Hispanic children, ages 0-19 years, diagnosed between 2000 and 2011. Among the 31,866 patients identified, whites had a significant survival advantage over blacks and Hispanics for several childhood cancers.

Socioeconomic status significantly mediated the association between race/ethnicity and survival for acute lymphoblastic leukemia, acute myeloid leukemia, neuroblastoma, and non-Hodgkin lymphoma. Socioeconomic status reduced the original association between race/ethnicity and survival by 44 percent, 28 percent, 49 percent, and 34 percent respectively for blacks versus whites, and by 31 percent, 73 percent, 48 percent, and 28 percent respectively for Hispanics versus whites; however, socioeconomic status did not significantly contribute to racial and ethnic disparities in survival for other types of childhood cancer including central nervous system tumors, soft tissue sarcomas, Hodgkin lymphoma, Wilms tumor, and germ cell tumors.

"These findings provide insight for future intervention efforts aimed at closing the survival gap," said Dr. Kehm, who is currently conducting postdoctoral research at Columbia University. "For cancers in which socioeconomic status is a key factor in explaining racial and ethnic survival disparities, behavioral and supportive interventions that address social and economic barriers to effective care are warranted; however, for cancers in which survival is less influenced by socioeconomic status, more research is needed on underlying differences in tumor biology and drug processing."

Dr. Kehm stressed that the causes of racial and ethnic disparities in childhood cancer survival are likely complex. For some types of childhood cancer, racial and ethnic survival disparities could be addressed through initiatives that reduce social and economic barriers to effective care such as expanded health insurance coverage, improved patient care coordination, increased health literacy, and supplementation of transportation and childcare costs during treatment. For other types of childhood cancer, the biology of drug processing or tumor biology that differs by ancestry may be more important.

An accompanying editorial explores the epidemiologic challenges of understanding social determinants of childhood cancer survival, specifically concerning racial and ethnic disparities, and discusses future directions to increase health equity for childhood cancer patients.

Source: Eurekalert

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