title: Ocular comorbidities among cataract-operated patients in rural China: the caring is hip Study of Cataract Outcomes and Uptake of Services (SCOUTS), report No. 3.
abstract: OBJECTIVE
  To determine the prevalence and impact on vision and visual function of ocular comorbidities in a rural Chinese cataract surgical program, and to devise strategies to reduce their associated burden.
  
  
  METHODS
  Cross-sectional cohort study.
  
  
  METHODS
  Persons undergoing cataract surgery by one of two recently trained local surgeons at a government-run village-level hospital in rural Guangdong between August 8 and December 31, 2005.
  
  
  METHODS
  Eligible subjects were invited to return for a comprehensive ocular examination and visual function interview 10 to 14 months after surgery. Prevalent ocular comorbid conditions were identified.
  
  
  METHODS
  Presenting and best-corrected vision, visual function, and treatability of the comorbidity.
  
  
  RESULTS
  Of 313 persons operated within the study window, 242 (77%) could be contacted by telephone; study examinations and interviews were performed on 176 (74%). Examined subjects had a mean age of 69.4+/-10.5 years, 116 (66%) were female, and 149 (85%) had been blind (presenting vision < or = 6/60) in the operative eye before surgery. Among unoperated eyes, 89 of 109 (81.7%) had > or =1 ocular comorbidities, whereas for operated eyes the corresponding proportion was 72 of 211 (34.1%). The leading comorbidity among operated eyes was refractive error (43/72 [59.7%]), followed by glaucoma/glaucoma suspect (14/72 [19.4%]), whereas for unoperated eyes, it was cataract (80/92 [87.0%]), followed by refractive error (12/92 [13.0%]). Among operated eyes with comorbidities, 90.3% (65/72) had > or =1 comorbidities that were treatable. In separate models adjusting for age and gender, persons with > or =1 comorbidities in the operated eye had significantly worse presenting vision (P<0.001) than those without such findings, but visual function (P = 0.197) and satisfaction with surgery (P = 0.796) were unassociated with comorbidities.
  
  
  CONCLUSIONS
  Ocular comorbidities are highly prevalent among persons undergoing cataract surgery in this rural Asian setting, and their presence is significantly associated with poorer visual outcomes. The fact that the great majority of comorbidities encountered in this program are treatable suggests that strategies to reduce their impact can be successful.
authors.affiliation: Joint Shantou International Eye Center of Shantou University and Chinese University of Hong Kong, Shantou, China.
authors.forename: Yingpeng
authors.initials: Y
authors.lastname: Liu
authors.forename: Nathan G
authors.initials: NG
authors.lastname: Congdon
authors.forename: Hoi
authors.initials: H
authors.lastname: Fan
authors.forename: Xiuqin
authors.initials: X
authors.lastname: Zhao
authors.forename: Kai
authors.initials: K
authors.lastname: Choi
authors.forename: Dennis S C
authors.initials: DS
authors.lastname: Lam
mesh_terms: D000368:Aged; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D002681:China / Q000453:epidemiology; D015897:Comorbidity; D003316:Corneal Diseases / Q000453:epidemiology* / Q000517:prevention & control; D003430:Cross-Sectional Studies; D003930:Diabetic Retinopathy / Q000453:epidemiology* / Q000517:prevention & control; D005260:Female; D005901:Glaucoma / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D008297:Male; D010043:Outcome and Process Assessment, Health Care; D015995:Prevalence; D012030:Refractive Errors / Q000453:epidemiology* / Q000517:prevention & control; D012424:Rural Population / Q000706:statistics & numerical data*; D014792:Visual Acuity / Q000502:physiology