Pediatric oncologist Lena Winestone, MD, recalls treating a 2-year-old leukemia patient who underwent a bone marrow transplant as her only chance for a cure.
The girl’s family, who spoke only Spanish and struggled with literacy, could not pay their rent or afford the girl’s weekly transportation to the hospital for after-transplant care. The family had three other children and lived more than 2 hours from the transplant center, remembers Dr. Winestone, an assistant professor of pediatrics in the division of malignancies and bone & marrow transplant at the University of California, San Francisco.
The hospital’s social worker was able to secure grant support for the family’s housing and worked with the patient’s insurance to arrange for transportation. However, the departure times were rigid, Dr. Winestone said, and the family sometimes had to leave the hospital before the child’s graft vs. host disease (GvHD) treatment was complete for the day.
“If we had not finished her treatment, we had to disconnect her from the machine early,” Dr. Winestone said. “Her mother also had to load her oxygen tanks [three of them], her BiPAP machine, and her tube feeds into the transportation every week in order to make sure she could be safely transported. She was treated for GvHD for almost 2 years, but unfortunately, her GvHD started to affect her lungs and ultimately, she passed away.”
Dr. Winestone says it’s difficult to know whether the girl’s death was directly related to her socioeconomic status, but that it certainly made all aspects of the child’s care more complicated and forced health care providers to adapt her cancer care to accommodate the family’s circumstances.
This story is one of countless cases where socioeconomic status impacted a young patient’s cancer care and likely contributed to a worse outcome.
A 2022 study for example, found that children from marginalized racial/ethnic groups and those living in poverty were more likely to have inferior 5-year overall survival, compared with other children, even when assigned to receive the same initial treatment. Of 696 children with high-risk neuroblastoma, 47% of Hispanic children had a 5-year overall survival (OS), compared with 50% for other non-Hispanic children, and 61% for white non-Hispanic patients. Children on public health insurance (a proxy for household poverty) had a 53% 5-year OS, compared with 63% for children unexposed to household poverty. Pediatric patients exposed to neighborhood poverty had a 54% 5-year OS, compared with 62% for unexposed children.
In another study, children with acute lymphoblastic leukemia who lived in high-poverty areas were more likely to experience early relapse than other patients, despite having the same treatment. Of the 575 children studied, 92% of children from high-poverty areas who relapsed, experienced early relapse, defined as less than 36 months after remission. By comparison, only 48% of other children who relapsed experienced early relapse.
Reasons behind the relapse and survival disparities are multifold, which has led to challenges in addressing the gaps and improving cancer outcomes for poverty-stricken children. A research infrastructure that is largely based on biological, rather than social determinants of health, acts as another barrier, oncologists say.
Historically, interventions to address disparities in pediatric oncology have never been evaluated, said Kira Bona, MD, MPH, a pediatric oncologist at Dana-Farber/Boston Children’s Cancer and Blood Disorders Center. This is in large part because the body of literature illustrating the disparities is relatively new, said Dr. Bona, whose research focuses on poverty-associated outcome disparities in childhood cancer.
However, new efforts aim to change this landscape by using the growing data to develop and analyze possible interventions. A set of three novel interventions led by Dr. Bona and her research team are in the works, some of which have shown promise in early studies.
“Now is the time to begin to actively intervene on disparities in childhood cancer,” Dr. Bona said. “We’re really good at studying genetic mutations in cancer cells that might lead to a risk of relapse, and when we identify those mutations, what we do is intervene. We try new chemotherapy agents, new ways of delivering therapy. We are now at the point where we have identified that social determinants of health may be equally ‘risky’ but we haven’t taken the next step to begin intervening in the same way.”