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Source: Ophthalmology  |  Posted 8 years ago

Effect on Intraocular Pressure in Patients Receiving Unilateral Intravitreal Anti-Vascular Endothelial Growth Factor Injections; Hoang QV, Mendonca LS, Torre KE, Jung JJ, Tsuang AJ, Freund KB; Ophthalmology (Nov 2011)

PURPOSE: We assessed the frequency and predictive factors related to intraocular pressure (IOP) elevation in neovascular age-related macular degeneration (AMD) patients undergoing unilateral intravitreal ranibizumab and/or bevacizumab injections. DESIGN: Retrospective cohort study. PARTICIPANTS: Charts of 207 patients with neovascular AMD who presented to a single physician at a retinal referral practice over a 6-month period were retrospectively reviewed. METHODS: Data recorded included demographic information, clinical findings, total number of bevacizumab and ranibizumab injections received and IOP at each visit. Increases above baseline IOP of>5,>10, or>15 mmHg on ≥2 consecutive visits while under treatment were noted. MAIN OUTCOME MEASURES: The frequency of IOP elevation was compared between treated and untreated eyes. In addition, among treated eyes, frequency and odds ratio of experiencing IOP elevation>5 mmHg above baseline on ≥2 consecutive visits was stratified by number of injections. For the main regression analysis, the outcome variable was IOP elevation>5 mmHg on ≥2 consecutive visits and the main independent variable was total number of injections. RESULTS: On ≥2 consecutive visits, 11.6% of treated versus 5.3% of untreated/control eyes experienced IOP elevation of>5 mmHg. The mean number of injections was higher in those with (24.4; 95% confidence interval [CI], 20.9-28.0; range, 9-39) than without IOP elevation of>5 mmHg (20.4; 95% CI, 18.9-21.8; range, 3-48) on ≥2 consecutive visits. There was an increased odds ratio (5.75; 95% CI, 1.19-27.8; P = 0.03) of experiencing IOP elevation>5 mmHg on ≥2 consecutive visits in patients receiving ≥29 injections compared with ≤12 injections. Of the factors considered, only the total number of injections showed a statistically significant association with IOP elevation>5 mmHg above baseline on ≥2 consecutive visits in treated eyes (P = 0.05). CONCLUSIONS: A greater number of intravitreal anti-vasular endothelial growth factor injections is associated with an increased risk for IOP elevation>5 mmHg on ≥2 consecutive visits in eyes with neovascular AMD receiving intravitreal ranbizumab and/or bevacizumab. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found after the references.

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