Journal ArticleDOI
Validation, test-retest reliability and norm scores for the Dutch Catquest-9SF
Martijn S. Visser,Myrthe Dieleman,Stijn Klijn,Reinier Timman,Mats Lundström,Jan J. V. Busschbach,Nicolaas J Reus +6 more
TLDR
The aim was to develop a formal Dutch translation, calculate norm scores, assess the Catquest‐9SF questionnaire validity and test–retest reliability and provide an easy way for use in clinical practice.Abstract:
Purpose: The Catquest-9SF questionnaire is a unidimensional, reliable, valid and short patient-reported outcome measure for quantifying benefits in visual functioning from cataract surgery. Our aim was to develop a formal Dutch translation, calculate norm scores, assess its validity and test-retest reliability and provide an easy way for use in clinical practice. Methods: Translation of the questionnaire was performed according to guidelines of the International Society for Pharmacoeconomics and Outcomes Research. Catquest-9SF was obtained in 657 patients pre- and postcataract surgery. We applied Rasch and classical analyses to determine the questionnaire performance with characteristics such as unidimensionality, reliability, separation and differential item functioning. Test-retest reliability was assessed in another group of 145 patients. A cut-off value to discriminate between people with and without cataract, norm scores and a reliable change index (RCI) were calculated using data from a sample of 916 'healthy' persons from the normal population. Results: The Dutch Catquest-9SF was unidimensional, and both person and item reliability were high; 0.87 and 0.99, respectively. Cronbach's alpha was 0.94, test-retest reliability was 0.85 and the intraclass correlation coefficient was 0.93. Catquest-9SF showed to be responsive to the effect of cataract surgery (effect size = 1.27; p < 0.001). The cut-off value was -1.90, and RCI was 2.27. A quick-access table with norm scores and percentiles was established to facilitate clinical interpretation. Conclusion: This investigation provides validity and reliability of the Dutch Catquest-9SF as well as norm scores and a new tool to facilitate the clinical interpretation of patient scores. This makes Catquest-9SF suitable for routine use in clinical practice. (Less)read more
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Journal ArticleDOI
Effect of active evaluation on the detection of negative dysphotopsia after sequential cataract surgery: discrepancy between incidences of unsolicited and solicited complaints
Natalia Y. Makhotkina,Marjan D. Nijkamp,Tos T. J. M. Berendschot,Bart van den Borne,Rudy M.M.A. Nuijts +4 more
TL;DR: To evaluate the incidence of negative dysphotopsia after sequential cataract surgery, a large number of patients with confirmed or suspected cataracts underwent sequential surgery in order to establish a baseline for this study.
Journal ArticleDOI
The Chinese Catquest-9SF: validation and application in community screenings.
TL;DR: The Chinese version of Catquest-9SF is a valid and reliable questionnaire in community screenings and may be expected to be an auxiliary tool for preliminary cataract screening use.
Journal ArticleDOI
Validation of Catquest-9SF-A Visual Disability Instrument to Evaluate Patient Function after Corneal Transplantation
Margareta Claesson,W. John Armitage,Berit Byström,Per Montan,Branka Samolov,Ulf Stenvi,Mats Lundström +6 more
TL;DR: Rasch analysis showed that Catquest-9SF is a valid instrument for measuring visual disability in patients who have undergone corneal transplantation primarily to improve vision.
Journal ArticleDOI
Validation and application of Catquest-9SF in various populations: A systematic review.
Anna Kabanovski,Wendy Hatch,Varun Chaudhary,Sherif El-Defrawy,Robert I. Reid,Iqbal Ike K. Ahmed,Matthew B. Schlenker,Matthew B. Schlenker +7 more
TL;DR: The validity of Catquest-9SF as a patient-reported outcome questionnaire as a valid and reliable tool to measure visual function in patients with cataract in various populations is concluded.
Journal ArticleDOI
Visual outcomes of a new nondiffractive extended depth-of-focus intraocular lens targeted for minimonovision: 3-month results of a prospective cohort study
TL;DR: In this article , the authors evaluated visual outcomes, spectacle independence, and optical phenomena after bilateral implantation of a nondiffractive extended depth-of-focus intraocular lens (IOL) targeted for minimonovision.
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