The outcome of cataract surgery measured with the Catquest-9SF
Mats Lundström; Anders Behndig; Maria Kugelberg; Per Montan; Ulf Stenevi; Konrad Pesudovs; John M. Linacre
Purpose: The purpose of this study was to use the Catquest-9SF to measure cataract surgery outcomes, and to use Rasch analysis to test the psychometric properties of this questionnaire, including its validity and responsiveness. Methods: Patients were recruited as consecutive cataract surgery patients during 1 month at six surgical units in Sweden (via the National Cataract Register). The patients completed the questionnaire before surgery and 3 months after. The Catquest-9SF data were assessed for fit to the Rasch model using version 3.63.2 of the WINSTEPS software (Winsteps.com, Beaverton, OR, USA). Both preoperative and postoperative questionnaires were included in the analysis. The responsiveness to cataract surgery was calculated as the effect size. Results: Completed questionnaires before and after surgery were received from 846 patients. The Rasch analysis showed that the category...
Mats Lundström, Anders Behndig, Maria Kugelberg, Per Montan, Ulf Stenevi, Konrad Pesudovs, & John M. Linacre (2009). The outcome of cataract surgery measured with the Catquest-9SF. Acta Ophthalmologica, 89(8), 718-723. https://doi.org/10.1111/j.1755-3768.2009.01801.x