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  • Title: Predictive factors for open-angle glaucoma among patients with ocular hypertension in the European Glaucoma Prevention Study.
    Author: European Glaucoma Prevention Study (EGPS) GroupUniversità di Milano Bicocca, Policlinico di Monza, Via Amati 111, 20052, Monza, Mi, Italy. stefano.miglior@unimib.it, Miglior S, Pfeiffer N, Torri V, Zeyen T, Cunha-Vaz J, Adamsons I.
    Journal: Ophthalmology; 2007 Jan; 114(1):3-9. PubMed ID: 17070596.
    Abstract:
    OBJECTIVE: To evaluate the predictive factors of open-angle glaucoma (OAG) in patients affected by ocular hypertension enrolled in the European Glaucoma Prevention Study (EGPS). DESIGN: Randomized, double-masked, controlled clinical trial. PARTICIPANTS: One thousand seventy-seven patients, > or =30 years old, were enrolled at 18 European centers. The patients met inclusion criteria: intraocular pressure, 22 to 29 mmHg; 2 normal and reliable visual fields (VFs) (on the basis of mean deviation and corrected pattern standard deviation [PSD]); and a normal optic disc, as determined by an optic disc reading center. INTERVENTION: Treatment with dorzolamide or a placebo (the vehicle of dorzolamide) in one or both eyes. MAIN OUTCOME MEASURES: Efficacy end points were VF and/or optic disc changes. Baseline demographic and clinical data were collected before randomization, except for corneal thickness measurements, which were determined during follow-up. Proportional hazards models were used to identify factors that predicted which participants in the EGPS had developed OAG. RESULTS: In multivariate analyses, factors that predicted the development of OAG included older age (hazard ratio [HR], 1.32; 95% confidence interval [CI], 1.04-1.69), larger vertical cup-to-disc (C/D) ratio (HR, 1.34; 95% CI, 1.14-1.58), larger vertical C/D ratio asymmetry (HR, 1.46; 95% CI, 1.11-1.93), higher PSD (HR, 1.66; 95% CI, 1.15-2.38), and lesser central corneal thickness (HR, 1.32; 95% CI, 1.05-1.67). CONCLUSIONS: Baseline age, vertical C/D ratio, vertical C/D ratio asymmetry, and PSD were good predictors of the onset of OAG in the EGPS. Central corneal thickness was found to be a powerful predictor of the development of OAG. The EGPS results agree with the findings of the Ocular Hypertension Treatment Study and support the need for a thorough evaluation of patients with ocular hypertension.
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