title: A study of racial differences in age at onset and progression of presbyopia.
abstract: BACKGROUND
  This study investigated reported differences in age at onset and progression of presbyopia between black and white patients.
  
  
  METHODS
  The records of 692 primary care patients (242 black and 450 white), ages 35 to 55 years, who received eye examinations at the University of Alabama at Birmingham School of Optometry (December 1, 1992 and May 31, 1993), were reviewed retrospectively. Regression models were used to compare age at onset and progression of presbyopia of study subjects with respect to race. Also, the effect of socioeconomic status (SES) was assessed for a subset of 373 subjects.
  
  
  RESULTS
  No significant differences in the age at onset or progression of presbyopia were detected between black and white patients (p > 0.05). Similarly, there were no significant differences in age at onset and progression of presbyopia with respect to socioeconomic status.
  
  
  CONCLUSIONS
  Contrary to previous studies, the onset and progression of presbyopia of black and white patients in this study population did not differ significantly. This result suggests other factors may play a role in previously reported variation of presbyopia in black and white patients. Similarly, variations in income status did not significantly impact the onset and progression of presbyopia. Further study is needed to corroborate or refute these findings.
authors.affiliation: University of Alabama at Birmingham School of Optometry 35294-0010, USA.
authors.forename: H
authors.initials: H
authors.lastname: Hunter
authors.forename: M
authors.initials: M
authors.lastname: Shipp
mesh_terms: D000328:Adult; D001741:Black or African American; D017668:Age of Onset; D000407:Alabama / Q000453:epidemiology; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011305:Presbyopia / Q000175:diagnosis* / Q000208:ethnology* / Q000503:physiopathology; D012189:Retrospective Studies; D014792:Visual Acuity; D044465:White People