ESCRS - PPE28.08 - Test-Retest Reliability Of The Catquest-9Sf Questionnaire: Measuring Patient-Reported Visual Function Outcome In Cataract Surgery

Test-Retest Reliability Of The Catquest-9Sf Questionnaire: Measuring Patient-Reported Visual Function Outcome In Cataract Surgery

Published 2022 - 40th Congress of the ESCRS

Reference: PPE28.08 | Type: ESONT - Abstract | DOI: 10.82333/8knn-ej18

Authors: Magnus Grimfors* 1 , Mats Lundström 2 , Maria Kugelberg 1

1Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden,St. Erik Eye Hospital, Stockholm, Sweden,Stockholm,Sweden, 2Department of Clinical Sciences, Ophthalmology,Faculty of Medicine, Lund University,Lund,Sweden

Purpose

To assess the test-retest reliability of the Catquest-9SF questionnaire in cataract surgery.

Setting/Venue

We performed a single-centre prospective test-retest study at S:t Erik Eye Hospital in Stockholm, Sweden.

Methods

We used the Swedish National Cataract Register and the Catquest-9SF questionnaire, Patients (n = 144) completed the Catquest-9SF twice before cataract surgery, with a minimum of 7 days and a maximum of 14 days between the two questionnaires. A rating scale model was constructed on the basis of the questionnaires from the first measurement, and used to generate scores for both the first and second measurements. The consistency was investigated by calculating intraclass correlation, Pearson correlation, and a Bland-Altman plot. Internal consistency was measured using Cronbach’s alpha.

Results

Analyses showed an intraclass correlation of 0.93 (95% confidence interval: 0.90–0.95), a Pearson correlation of 0.93, and a Cronbach’s alpha of 0.94. The results fit well in a Bland-Altman plot.

Conclusions

The test-retest reliability of the Swedish Catquest-9SF is excellent. Along with previous knowledge, this supports continued use of the Catquest-9SF in evaluating quality and outcome in cataract surgery.