Evaluating Disparities in End-Stage Kidney Disease Survival Among American Indian/Alaska Native Persons with Diabetes

Background: American Indian/Alaska Natives (AI/ANs) disproportionately suffer from diabetes compared to non-Hispanic whites (NHW). In 2013, 69% of end-stage kidney disease (ESKD) in AI/ANs was caused by diabetes (ESKD-D) but accounts for only 44% of ESKD diagnoses in the overall USA population. Moreover, the diagnosis of diabetes and ESKD-D may be significantly related to social determinants of health. The purpose of this study was to conduct a survival analysis of AI/ANs and NHWs diagnosed with ESKD-D nationally and by Indian Health Service region and correlate the survival analysis to the Area Deprivation Index® (ADI®).

Methods: This manuscript reports a retrospective cohort analysis of 2021 United States Renal Data System data. Eligible patient records were AI/AN and NHWs with diabetes as the primary cause of ESKD and started dialysis on January 1, 2014, or later.

Results: A total of 81,862 patient records were included in this analysis, of which 1798 (2.2%) were AI/AN. AI/ANs survive longer, with an 18.4% decrease in risk of death compared to NHW. However, AI/ANs are diagnosed with ESKD-D and start dialysis earlier than NHWs. ADI® variables became significant as ADI® ratings increased, meaning persons with greater social disadvantage had worse survival outcomes.

Conclusions: The findings reveal that AI/ANs have better survival outcomes than NWH, explained in part by initiating dialysis earlier than NHW. Additional research is needed to explore factors (e.g., social determinants; cultural; physiologic) that contribute to earlier diagnosis of ESKD-D in AI/ANs and the impact of prolonged dialysis on quality of life of those with ESKD-D.