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Validation of Catqu...
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Nielsen, EsbenSilkeborg Regional Hospital,Aalborg University
(author)
Validation of Catquest-9SF in Danish : developing a revised form of the Catquest-9SF – the Danish Catquest-7SF
- Article/chapterEnglish2019
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LIBRIS-ID:oai:lup.lub.lu.se:a70cede6-8bb4-4754-90a9-d6dc0cab9f69
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https://lup.lub.lu.se/record/a70cede6-8bb4-4754-90a9-d6dc0cab9f69URI
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https://doi.org/10.1111/aos.13921DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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Purpose: The primary goal was to validate a Danish translated version of the Catquest-9SF by Rasch analysis. The secondary goal was to investigate whether preoperative Catquest-9SF scores, best-corrected visual acuity, comorbidity, gender, age or corneal astigmatism could predict improvements in subjective outcome. Methods: In a prospective trial, 250 patients eligible for cataract surgery were included. Patients filled out the translated Catquest-9SF questionnaire before surgery and again 3 months after surgery. Both preoperative and postoperative questionnaires were included in the Rasch analysis. A multiple reverse stepwise regression model was used to investigate the correlation between preoperative measurements and subjective improvement. Results: The preliminary Rasch analysis showed misfit of items 4 and 6. These items were removed, and the remaining seven items demonstrated a measurement precision of 2.78, a person reliability coefficient of 0.89, ordered response categories, infit of 0.69–1.22, outfit of 0.73–1.14, observed raw variance explained by measures of 70.4% and an eigenvalue of 1.7. Item 7 showed a mild DIF for gender (0.54 logits), and person mean Rasch score targeting was −1.69 logits. Preoperative Catquest score was the only parameter with a significant correlation to a gain in subjective outcome (p < 0.001). A preoperative Catquest-9SF score of 0.5 carried a 95% likelihood of an increase in subjective outcome. Conclusion: The Danish version of the Catquest-9SF fit the Rasch model. Only preoperative Catquest-9SF score was correlated to subjective improvement, and a cut-off value of 0.5 predicted an improvement in subjective outcome with 95% probability.
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Lundström, MatsLund University,Lunds universitet,Oftalmologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Ophthalmology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)med-ml13
(author)
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Pesudovs, KonradAustralian College of Optometry
(author)
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Hjortdal, JesperAarhus University Hospital
(author)
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Silkeborg Regional HospitalAalborg University
(creator_code:org_t)
Related titles
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In:Acta Ophthalmologica: Wiley97:2, s. 173-1771755-375X1755-3768
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