Multivariable Cox regression model identifying factors associated with visiting an emergency department for any ocular condition. Reference groups: age 21-30, white race, male sex, annual income <$40,000. A frequent ED visitor was defined as having > 4 visits / year for non-ophthalmologic conditions. Having a regular eye care provider was defined as >3 visits with an eye care provider with at least one 6-month interval between the visits. The multivariable Cox regression model was also adjusted for education level, urban/rural status, plan type, and dual enrolment status. ED = emergency department.