Quantifying barriers to diabetic eye screening: a two-center study at the University of California

Objective: This study aimed to evaluate the diabetic eye disease screening continuum at two academic centers and identify its barriers. Research Design and Methods: We analyzed health records from UCSF and UCI to identify primary care patients needing diabetic eye screening. We tracked referrals, screenings, diagnoses, and treatments to evaluate predictors and the impact of an automated referral system. We analyzed physician notes using GPT-4o to determine reasons for missed screenings. Results: Of 8,240 unscreened T2DM patients, 43% received a referral, and only 16% completed screening within a year. Demographic, provider, and socioeconomic factors predicted adherence, with referrals being the strongest predictor. An automated referral system could improve screening rates to 22-34%. Clinician notes cited comorbidities, scheduling challenges, logistical issues, COVID-19, and personal circumstances as barriers. Conclusion: Many T2DM patients remain unscreened after primary care visits. Although an automated referral system may partially improve adherence, additional tailored strategies are needed.