Purpose: To assess health care utilization and vision outcomes over 2 years in patients receiving bevacizumab treatment in clinical practice for diabetic macular edema.
Methods: Patients with newly diagnosed diabetic macular edema who received an intravitreal bevacizumab injection within 12 months of initial diagnosis were identified from Kaiser Permanente's 350,000 patients with diabetes mellitus treated between 2008 and 2013. Snellen best-corrected visual acuity (BCVA), number of intravitreal injections, and patient characteristics were abstracted from the electronic record. The main outcome measure was change in BCVA.
Results: Three hundred and nine patients met the inclusion criteria and had 2 years of follow-up after their first bevacizumab injection. These patients had a mean of 3.1 injections (range, 1-17) during the 2-year follow-up. Mean BCVA improvement was 5.4 letters at 12 months and 5.3 letters at 24 months. Only 29.8% of patients demonstrated ≥3 lines of vision improvement from baseline, whereas 12.3% had ≥3 lines of vision loss from baseline at 24 months.
Conclusion: This is the largest U.S. clinical practice-based study of bevacizumab use in diabetic macular edema. Consistent with national studies, the frequency of injection was low. Average BCVA improvement was lower than in anti-vascular endothelial growth factor trials. Significant BCVA improvement was achieved in approximately 30% of patients with newly diagnosed diabetic macular edema.