Disparities in survival improvement for U.S. childhood and adolescent cancer between 1995 and 2019: An analysis of population-based data

Xiaoyan Wang, Derek S. Brown, Yin Cao, Christine C. Ekenga, Shenyang Guo, Kimberly J. Johnson

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Although treatment advances have increased childhood and adolescent cancer survival, whether patient subgroups have benefited equally from these improvements is unclear. Methods: Data on 42,865 malignant primary cancers diagnosed between 1995 and 2019 in individuals ≤ 19 years were obtained from 12 Surveillance, Epidemiology, and End Results registries. Hazard ratios (HRs) and 95 % confidence intervals (CIs) for cancer-specific mortality by age group (0–14 and 15–19 years), sex, and race/ethnicity were estimated using flexible parametric models with a restricted cubic spline function in each of the periods: 2000–2004, 2005–2009, 2010–2014 and 2015–2019, versus 1995–1999. Interactions between diagnosis period and age group (children 0–14 and adolescents 15–19 years at diagnosis), sex, and race/ethnicity were assessed using likelihood ratio tests. Five-year cancer-specific survival rates for each diagnosis period were further predicted. Results: Compared with the 1995–1999 cohort, the risk of dying from all cancers combined decreased in subgroups defined by age, sex and race/ethnicity with HRs ranging from 0.50 to 0.68 for the 2015–2019 comparison. HRs were more variable by cancer subtype. There were no statistically significant interactions by age group (Pinteraction=0.05) or sex (Pinteraction=0.71). Despite non-significant differences in cancer-specific survival improvement across different races and ethnicities (Pinteraction=0.33) over the study period, minorities consistently experienced inferior survival compared with non-Hispanic Whites. Conclusions: The substantial improvements in cancer-specific survival for childhood and adolescent cancer did not differ significantly by different age, sex, and race/ethnicity groups. However, persistent gaps in survival between minorities and non-Hispanic Whites are noteworthy.

Original languageEnglish
Article number102380
JournalCancer Epidemiology
Volume85
DOIs
StatePublished - Aug 2023

Keywords

  • Adolescent
  • Healthcare disparities
  • Neoplasm
  • Pediatric
  • Survival

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