Assessment of Cataract Surgery Outcome Using the Modified Catquest Short-Form Instrument in China

Jyoti Khadka; Jinhai Huang; Haisi Chen; Chengwei Chen; Rongrong Gao; Fangjun Bao; Sifang Zhang; Qinmei Wang; Konrad Pesudovs

doi:10.1371/journal.pone.0164182

Assessment of Cataract Surgery Outcome Using the Modified Catquest Short-Form Instrument in China

PLoS One. 2016 Oct 13;11(10):e0164182. doi: 10.1371/journal.pone.0164182. eCollection 2016.

Authors

Jyoti Khadka^{1

2}, Jinhai Huang^{1

3}, Haisi Chen¹, Chengwei Chen¹, Rongrong Gao^{1

3}, Fangjun Bao¹, Sifang Zhang¹, Qinmei Wang^{1

3}, Konrad Pesudovs²

Affiliations

¹ School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
² Discipline of Optometry and Vision Science, Flinders University of South Australia, Bedford Park, South Australia, Australia.
³ Key Laboratory of Vision Science, Ministry of Health P.R. China, Wenzhou, Zhejiang, China.

Abstract

Purpose: 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.

Conclusion: The Catquest-8SF-CN demonstrated promising Rasch based psychometric properties and was highly responsive to cataract surgery.

MeSH terms

Activities of Daily Living / psychology*
Aged
Cataract Extraction / psychology*
China
Disability Evaluation
Female
Humans
Male
Patient Satisfaction
Psychometrics
Sickness Impact Profile
Surveys and Questionnaires
Treatment Outcome
Visual Acuity / physiology*

Grants and funding

This work was supported in part by the National Natural Science Foundation of China (81300807); Foundation of Wenzhou City Science & Technology Bureau (Y20140705, Y20140159; www.wzkj.gov.cn); Zhejiang Provincial & Ministry of Health Research Fund For Medical Sciences (WKJ-ZJ-1530); Scientific Research Fund of Zhejiang Provincial Kangenbei (2015ZHA-KEB206); Science and Technology Planning Project of Zhejiang Province (2016C33082); National Science and Technology Major Project (2014ZX09303301). The funders had no role in study design, data collection and analysis, decision to publish, or reparation of the manuscript.