A Quality Improvement Study on Colonoscopy Wait Times in Underinsured Patients Following the COVID-19 Pandemic

Introduction:The coronavirus disease 2019 (COVID-19) pandemic limited access to colonoscopy. To advance colorectal cancer health equity, we conducted a quality improvement study on colonoscopy wait times in 2019-2023 for underinsured (Medicaid, uninsured) compared to insured patients at an academic medical center providing colonoscopy for surrounding Federally Qualified Health Centers.Methods:Retrospective chart reviews were performed on adult outpatient colonoscopies in the pre-intervention period (2019-2021). In 2022, an institutional grant funded bilingual patient navigation to reduce colonoscopy wait times. Post-intervention data was collected prospectively from May 2022 to May 2023 in two phases. Multivariable regression analyses were conducted for colonoscopy wait times as a primary outcome.Result:Analysis of 3403 screening/surveillance and 1896 diagnostic colonoscopies revealed significantly longer colonoscopy wait times for underinsured compared to insured patients after 2019. For screening/surveillance colonoscopies, wait time differences between underinsured and insured patients in the second post-intervention phase were reduced by 34.21 days (95% CI: 11.07 - 57.35) compared to the post-pandemic period and by 56.36 days (95% CI: 34.16 - 78.55) compared to the first post-intervention phase. For diagnostic colonoscopies, wait time differences in the second post-intervention phase were reduced by 27.57 days (95% CI: 9.96 - 45.19) compared to the post-pandemic period and by 20.40 days (95% CI: 1.02 - 39.77) compared to the first post-intervention phase.Conclusion:Colonoscopy wait times were significantly longer for underinsured compared to insured patients following the COVID-19 pandemic. This disparity was partially ameliorated by patient navigation. Monitoring outpatient colonoscopy wait times in underinsured patients is important for advancing health equity.