Ovarian Cancer Survival Disparities Revealed Among Asian American Subgroups Despite Overall Lower Mortality Rates
Key Insights
Two studies presented ahead of the 2025 American Society of Clinical Oncology Annual Meeting revealed persistent racial and age disparities in ovarian cancer (search) mortality across the United States from 1999 to 2020.
While Asian American, Native Hawaiian, and Pacific Islander populations showed the lowest overall ovarian cancer (search) mortality rates at 4.96 per 100,000 individuals, disaggregated data exposed significant survival differences among subgroups.
Native Hawaiian and Southeast Asian women experienced worse survival outcomes compared to East Asian women, with hazard ratios of 1.334 and 1.137 respectively for risk of death.
Two comprehensive studies analyzing ovarian cancer (search) mortality trends have uncovered significant racial and ethnic disparities that persist despite overall improvements in survival rates, with particular attention to previously overlooked differences within Asian American, Native Hawaiian, and Pacific Islander populations.
National Mortality Trends Show Persistent Disparities
A 21-year analysis of US ovarian cancer (search) mortality from 1999 to 2020 examined 338,215 deaths, revealing an overall age-adjusted mortality rate (AAMR) of 8.32 per 100,000 individuals. While mortality rates declined from 9.48 per 100,000 in 1999 to 6.55 per 100,000 in 2020, significant racial disparities persisted throughout the study period.
Non-Hispanic White patients experienced the highest mortality rate at 8.64 per 100,000 individuals, followed by non-Hispanic Black patients at 7.08 per 100,000, non-Hispanic American Indians/Alaska Natives at 5.31 per 100,000, and non-Hispanic Asian or Pacific Islanders at 4.96 per 100,000 individuals.
Age stratification revealed that patients aged 65 and older faced the highest mortality risk with an AAMR of 43.09 per 100,000 individuals, compared to 11.25 per 100,000 for those aged 45-64 and 1.20 per 100,000 for those aged 25-44.
Hidden Disparities Within Asian American Populations
While Asian American, Native Hawaiian, and Pacific Islander populations showed the lowest overall mortality rates, a separate analysis of 7,803 patients from these groups compared to 212,441 non-Hispanic White patients revealed concerning disparities when data were disaggregated by subgroup.
The study divided the Asian American, Native Hawaiian, and Pacific Islander cohort into four subgroups: 2,909 East Asian, 2,455 Southeast Asian, 1,901 South Asian, and 538 Native Hawaiian and other Pacific Islander patients.
When analyzed as a single group, Asian American, Native Hawaiian, and Pacific Islander patients demonstrated significantly longer survival times than non-Hispanic White patients (128.46 months versus 95.17 months; P < .001). However, disaggregated analysis revealed substantial survival disparities among subgroups.
East Asian patients experienced the best survival outcomes at 128.94 months, significantly outperforming both Southeast Asian patients at 121.67 months (P < .032) and Native Hawaiian and other Pacific Islander patients at 114.77 months (P < .047).
Elevated Death Risk Among Specific Subgroups
Cox regression models revealed that Southeast Asian patients faced a 13.7% higher risk of death compared to East Asian patients (HR, 1.137; 95% CI, 1.036-1.248), while Native Hawaiian and other Pacific Islander patients experienced a 33.4% higher death risk (HR, 1.334; 95% CI, 1.135-1.568).
These findings highlight how aggregated data can mask significant health disparities within broadly categorized racial and ethnic groups, potentially leading to inadequate resource allocation and intervention strategies.
Clinical Implications and Future Directions
The researchers emphasized that grouping Asian American, Native Hawaiian, and Pacific Islander populations together obscures important differences in health behaviors and socioeconomic status that influence cancer outcomes. The studies underscore the critical importance of disaggregated data collection and analysis in cancer research.
"Targeted strategies are needed to further prevent mortality from ovarian cancer (search) in high-risk groups, especially dealing with the racial disparities," the researchers noted, calling for more nuanced approaches to addressing cancer health equity.
The findings suggest that while broad racial categories may show favorable outcomes for certain groups, significant disparities can exist within these populations that require targeted interventions and resources. This understanding is essential for developing more effective and equitable cancer care strategies that address the specific needs of diverse patient populations.