Purpose: To determine the rate of loss to follow-up (LTFU) and associated risk factors in patients with nonproliferative diabetic retinopathy (NPDR) who had diabetic macular edema (DME) and were receiving intravitreal anti-vascular endothelial growth factor (VEGF) injections.
Design: Retrospective cohort study.
Participants: A total of 2595 NPDR patients with DME who received at least one anti-VEGF injection at a single large retina practice from January 1, 2012, to January 1, 2017.
Methods: A retrospective review based on billing codes was performed. LTFU was defined as no subsequent office visits within 12 months after an intravitreal injection. Patient demographics and clinical features were evaluated, and logistic regression was used to identify independent predictors for LTFU.
Main Outcome Measures: LTFU rates and potential risk factors.
Results: LTFU was found in 413 (25.3%) of 1632 patients. Examining LTFU by racial groups, 21.3% identified themselves as white, 29.1% as black, 30.6% as Asian, and 35.0% as Hispanic (P < 0.001). A difference in LTFU was also found based on average adjusted gross income (AGI) (P < 0.001) and NPDR stage (P = 0.04). In the multivariate model, factors associated with LTFU included Hispanic (odds ratio [OR] 1.66), American Indian, Pacific Islander, multiple races (OR 2.60), and unknown race (OR 1.59) compared with those who were white. Additional factors included those with an average AGI of $50000 to $75000 (OR 1.37) and <$50000 (OR 1.88) compared with those with an average AGI > $75000. Based on subgroup analysis of patients with available visual acuity data, a significant association was found between decreasing baseline vision and LTFU (P < 0.001).
Conclusions: Approximately 1 in 4 patients with NPDR who had DME had no follow-up visit for at least 1 year after an anti-VEGF injection. Given the importance of ongoing therapy, these real-world findings may help identify at-risk groups for noncompliance with care.
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