Association Between Rurality and Race/Ethnicity and Pediatric Cancer Early Mortality: A Population-Based Cohort Study Using SEER Data from 2000 to 2021.

Background: Pediatric cancer mortality rates have steadily declined since 2009, but over a thousand deaths still occur annually. While existing research highlights the effects of race/ethnicity and rurality on overall survival, few studies have specifically analyzed these factors in relation to early mortality, defined as death within 12 months of diagnosis.

Procedure: This study utilized SEER Research Plus Limited-Field Data (2000-2021) to examine the association between race/ethnicity, rurality, and early mortality in pediatric cancer patients. A cohort of 138,648 individuals was analyzed using Cox proportional hazards regression models to calculate hazard ratios and 95% confidence intervals (CIs).

Results: The results demonstrated that both race/ethnicity and rurality were significantly associated with early mortality. Non-Hispanic Black patients were 70% (95% CI: 1.60-1.82) more likely to die within the first year of diagnosis compared to non-Hispanic Whites, and other racial/ethnic groups also saw significant associations. The adjusted hazard ratio for early mortality compared to urban counties greater than 1 million was significant (p < 0.05) for all degrees of rurality. Pediatric cancer patients in rural counties not adjacent to urban counties had the highest risk of early mortality, 27% (95% CI: 1.13-1.42), within 1 year of diagnosis. A subanalysis of adolescent patients also showed similar patterns.

Conclusions: These findings emphasize the need to address disparities in early mortality for pediatric cancer patients, particularly among racial/ethnic minorities and those in rural communities.