Gynecological Cancers Among American Indian and Alaska Native Women Living in the Upper Midwest, 1995-2019.

Background: American Indian and Alaska Native (AI/AN) women experience higher rates of mortality from many cancers than their non-Native counterparts.

Objective: To examine recent data on gynecological cancers (cervical, ovarian, and uterine) among AI/AN women living in the Upper Midwest (Iowa, Montana, Nebraska, North Dakota, South Dakota, and Wyoming) for any improvement in equity.

Methods: We used data from the North American Association for Central Cancer Registries Cancer in North America database (1995-2019). We used descriptive statistics, including incidence mortality rates, trends, and time to treatment. Analyses were restricted to non-Hispanic individuals living in a purchased/referred care delivery area (PRCDA) at the time of diagnosis; sensitivity analyses included all AI/AN people, regardless of PRCDA residence or ethnicity.

Results: From 1995 to 2019, there were 647 gynecological cancers diagnosed among AI/AN women living in PRCDA counties in the Upper Midwest (cervical n = 194, ovarian n = 142, uterine n = 311). Incidence and mortality rates for ovarian and uterine cancers were similar between AI/AN and non-Hispanic White (NHW) women; however, the incidence of cervical cancer was 1.87 (95% confidence interval [CI]: 1.60, 2.17) times higher, and mortality was 2.92 (95% CI: 2.29, 3.68) times higher among AI/AN compared to NHW women. The majority of AI/AN women diagnosed with gynecological cancer initiated treatment within 1 month (cervical = 67.2%, ovarian = 80.6%, uterine = 63.1%), which was similar to NHW women.

Conclusions: Differences exist in incidence and mortality for cervical cancer between AI/AN and NHW women in the Upper Midwest, with AI/AN facing continued inequity.