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Study: Recovery rates from childhood leukemia linked to race, ethnicity
Black, Hispanic and Native American children with Acute Lymphoblastic Leukemia (ALL) have worse survival rates than white and Asian children, even with the availability of modern therapies, Yale researchers reported in the Oct. 15 issue of the Journal of the American Medical Association.
Dr. Nina Kadan-Lottick, associate research scientist in pediatrics at the School of Medicine and the principal investigator, led a team of researchers who conducted a population-based study of 5,000 children younger than age 20 who were diagnosed with ALL, the most common childhood malignancy in the United States.
The team used the National Cancer Institute's Standardized Epidemiology End Result database to determine survival rates according to race and ethnicity. The database includes ethnicity and survival information from nine population centers around the country.
"We found that in the modern treatment era, black and Hispanic children still have worse outcome from leukemia than comparable white children," says Kadan-Lottick. "Survival ratio was 1.5 times worse for black children and 1.8 times worse for Hispanic children. The largest difference by race or ethnicity was observed among children diagnosed between ages 1 and 9 years."
Kadan-Lottick says the reason for the disparity is unclear, and further attention is needed to answer this question. The possibilities that must be explored include: differences in response to the same medications, differences in access to care and differences in compliance with therapy.
Previous studies have been based on the experience of a single referral center, Kadan-Lottick notes."The advantage of our study is that it is based on a national population-based registry."
Other authors on the study include Kirsten K. Ness and James G. Gurney of the University of Minnesota; and Dr. Smita Bhatia of the City of Hope National Medical Center in Duarte, California.
-- By Karen Peart
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