title: Reprint of: Relationship between cataract severity and socioeconomic status.
abstract: OBJECTIVE
  To determine the relationship between cataract severity and socioeconomic status (SES).
  
  
  METHODS
  Retrospective, observational case series. A total of 1350 eyes underwent phacoemulsification cataract extraction by a single surgeon using an Alcon Infiniti system. Cataract severity was measured using phaco time in seconds. SES was measured using area-level aggregate census data: median income, education, proportion of common-law couples, and employment rate. Preoperative best corrected visual acuity was obtained and converted to logarithm of the minimum angle of resolution values. For patients undergoing bilateral surgery, the generalized estimating equation was used to account for the correlation between eyes. Univariate analyses were performed using simple regression, and multivariate analyses were performed to account for variables with significant relationships (p < 0.05) on univariate testing. Sensitivity analyses were performed to assess the effect of including patient age in the controlled analyses.
  
  
  RESULTS
  Multivariate analyses demonstrated that cataracts were more severe when the median income was lower (p = 0.001) and the proportion of common-law couples living in a patient's community (p = 0.012) and the unemployment rate (p = 0.002) were higher. These associations persisted even when controlling for patient age.
  
  
  CONCLUSIONS
  Patients of lower SES have more severe cataracts.
authors.affiliation: Department of Ophthalmology, University of Alberta, Edmonton, Alta.
authors.forename: Jason D
authors.initials: JD
authors.lastname: Wesolosky
authors.affiliation: Department of Ophthalmology, University of Alberta, Edmonton, Alta.. Electronic address: crudnisk@ualberta.ca.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Rudnisky