Fig. 1From: The association between socioeconomic status and visual impairments among primary glaucoma: the results from Nationwide Korean National Health Insurance Cohort from 2004 to 2013Multinomial logistic regression analysis based on the National Health Insurance type, a Self-employees and b Employees. Compared to the high income group, middle and low income group show higher odds ratios for visual impairment before the first diagnosis of glaucoma, in both self-employees and employees. However, the association is stronger in self-employees than in employeesBack to article page