Disparities in ovarian cancer survival among ethnic Asian American populations, 2006-2020

Background: Asian Americans have the highest ovarian cancer survival across the major racial groups although it is unclear whether this survival advantage is observed when each Asian ethnic subgroup is examined separately. Disaggregated survival analyses of this heterogeneous population is needed to ensure ethnic-specific disparities are not overlooked.

Methods: Data on ovarian cancer cases diagnosed from 2006 through 2020 from the Surveillance, Epidemiology, and End Results (SEER) Program were analyzed. Age-standardized five-year cause-specific survival was calculated for Non-Hispanic Whites and seven Asian ethnic subgroups in the U.S. (Asian Indian/Pakistani, Chinese, Filipino, Hawaiian/Pacific Islander, Japanese, Korean, Vietnamese) by stage and histotype. Multivariable Cox regression analyses using a weighted approach were conducted to calculate average hazard ratios (AHRs) and 95 % confidence intervals (CIs) to quantify the risk of ovarian cancer death comparing each Asian ethnic subgroup to Non-Hispanic Whites.

Results: Hawaiian/Pacific Islanders were the only Asian subgroup to show lower five-year cause-specific survival than Non-Hispanic Whites (44.99 % versus 47.90 %, respectively); Asian Indian/Pakistanis showed the highest survival (56.12 %). After adjusting for sociodemographic, tumor, and treatment characteristics, Asian Indian/Pakistani ovarian cancer patients were 17 % less likely to die from their disease whereas Hawaiian/Pacific Islander patients were 28 % more likely to die when compared to Non-Hispanic Whites (AHR = 0.83, 95 % CI 0.75-0.92 and AHR = 1.28, 95 % CI 1.07-1.53, respectively).

Conclusions: There are clear ethnic-specific survival disparities among Asian American ovarian cancer patients that are missed when the population is examined as a single group, further highlighting the need for data disaggregation in future ovarian cancer research.