Purpose. This study examined the association between the severity of visual field defects and the prevalence of motor vehicle\ncollisions (MVCs) in subjects with primary open-angle glaucoma (POAG). Methods. This is a cross-sectional study. Japanese\npatients who have had driver�s licence between 40 and 85 years of age were screened for eligibility. Participants answered a\nquestionnaire about MVCs experienced during the previous 5 years. Subjects with POAG were classified as having mild,moderate,\nor severe visual field defect. We evaluated associations between the severity of POAG and the prevalence of MVCs by logistic\nregression models. Results.The prevalence of MVCs was significantly associated with the severity of POAG categorized by worse\neye MD (control: 30/187 = 16.0%; mild POAG: 17/92 = 18.5%; moderate POAG: 14/60 = 23.3%; severe POAG: 14/47 = 29.8%;\n???? = 0.025, Cochran-Armitage trend test). Compared to the control group, the adjusted OR for MVC prevalence in subjects with\nmild, moderate, or severe POAG in the worse eye was 1.07 (95% CI: 0.55 to 2.10), 1.44 (95% CI: 0.68 to 3.08), and 2.28 (95% CI: 1.07\nto 4.88). Conclusions.There is a significant association between the severity of glaucoma in the worse eye MD and the prevalence\nof MVCs.
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