title: Predictors of functional vision changes after cataract surgery: the PROVISION study.
abstract: OBJECTIVE
  To ascertain whether time-to-treatment, sex, age, preoperative functional vision scores, education, and ocular comorbidities predict change in functional vision pre- to postoperatively in patients receiving cataract surgery.
  
  
  METHODS
  Prospective cohort study.
  
  
  METHODS
  Three hundred and forty-three cataract patients at the Hamilton Regional Eye Institute.
  
  
  METHODS
  Participants 18 years or older scheduled to undergo cataract surgery completed the Catquest-9SF functional vision questionnaire on the day of their surgery and were mailed a survey 2-3 months postoperatively. Multivariate linear regression was used to determine the ability of predictors to explain variability in functional vision change between questionnaire administrations.
  
  
  RESULTS
  One hundred and sixty-six patients completed both baseline and follow-up questionnaires. Mean age of the cohort was 73.8 ± 8.1 years. Most patients were female (59.6%), had cataract surgery performed for the first time (66.9%), and had spent a mean time of 20.3 ± 20.7 weeks waiting for surgery. Functional vision improved in 83.7% of patients. The mean baseline Catquest-9SF score was the only significant predictor of functional vision improvement (adjusted R(2) = 0.47; F1,159 = 144.6; p < 0.001). Controlling for other variables, functional vision improved by 0.74 logits when mean baseline survey score increased by 1 logit.
  
  
  CONCLUSIONS
  In most patients, functional vision improved after cataract surgery. Mean baseline Catquest-9SF score was a moderate predictor of the observed improvement.
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont. Electronic address: surghrs@mcmaster.ca.
authors: Varun
authors: V
authors: Chaudhary
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Marko
authors: M
authors: Popovic
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Julie
authors: J
authors: Holmes
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Tammy
authors: T
authors: Robinson
authors: Faculty of Medicine, University of Toronto, Toronto, Ont.
authors: Michael
authors: M
authors: Mak
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: S Mohammad
authors: SM
authors: Mohaghegh P
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Dalia
authors: D
authors: Eino
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Keith
authors: K
authors: Mann
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Lawrence
authors: L
authors: Kobetz
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Kaela
authors: K
authors: Gusenbauer
authors: Hamilton Regional Eye Institute, Saint Joseph's Healthcare, McMaster University, Hamilton, Ont.
authors: Joshua
authors: J
authors: Barbosa
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000503:physiopathology*; D002387:Cataract Extraction; D015331:Cohort Studies; D004522:Educational Status; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D011446:Prospective Studies; D019591:Pseudophakia / Q000503:physiopathology*; D012737:Sex Factors; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D061665:Time-to-Treatment; D014792:Visual Acuity / Q000502:physiology*