title: Assessment of Cataract Surgery Outcome Using the Modified Catquest Short-Form Instrument in China.
abstract: OBJECTIVE
  To assess cataract surgery outcome using the Rasch scaled Chinese version of the Catquest short-form.
  
  
  METHODS
  The Chinese translated and culturally adapted version of the Catquest-9SF was interviewer-administered to patients, pre and post cataract surgery. Rasch analysis was performed on the baseline data to revise the Catquest. For the surgical outcome assessment, we stacked pre- and post-surgical Catquest data to demonstrate improvement in visual function scores and responsiveness of the instrument to cataract surgery.
  
  
  RESULTS
  A total of 247 cataract patients (median age, 70 yrs; male 51.0%) completed the Catquest 9SF at baseline.The Catquest-9SF possessed adequate measurement precision of 2.15. No disordering of response categories were observed and all the items perfectly fit to the Rasch model except item 7 (outfit >1.5). A slight reduction in precision was observed after removing misfitting item 7 (Catquest-8SF-CN), but the precision value was well above the acceptable value of 2.00. Notably, the instrument was well targeted (mean person location 0.30), demonstrated no evidence of multidimensionality and DIF. At 12 months post-surgery, 74 (30%) patients came for follow-up and completed the Catquest. There was a significant improvement in the Catquest scores post cataract surgery with a considerably large effect size.
  
  
  CONCLUSIONS
  The Catquest-8SF-CN demonstrated promising Rasch based psychometric properties and was highly responsive to cataract surgery.
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.|Discipline of Optometry and Vision Science, Flinders University of South Australia, Bedford Park, South Australia, Australia.
authors.forename: Jyoti
authors.initials: J
authors.lastname: Khadka
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.|Key Laboratory of Vision Science, Ministry of Health P.R. China, Wenzhou, Zhejiang, China.
authors.forename: Jinhai
authors.initials: J
authors.lastname: Huang
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Haisi
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Chengwei
authors.initials: C
authors.lastname: Chen
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.|Key Laboratory of Vision Science, Ministry of Health P.R. China, Wenzhou, Zhejiang, China.
authors.forename: Rongrong
authors.initials: R
authors.lastname: Gao
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Fangjun
authors.initials: F
authors.lastname: Bao
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
authors.forename: Sifang
authors.initials: S
authors.lastname: Zhang
authors.affiliation: School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.|Key Laboratory of Vision Science, Ministry of Health P.R. China, Wenzhou, Zhejiang, China.
authors.forename: Qinmei
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Discipline of Optometry and Vision Science, Flinders University of South Australia, Bedford Park, South Australia, Australia.
authors.forename: Konrad
authors.initials: K
authors.lastname: Pesudovs
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology*; D000368:Aged; D002387:Cataract Extraction / Q000523:psychology*; D002681:China; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D017060:Patient Satisfaction; D011594:Psychometrics; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*