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07.02.2018 | Original Paper | Ausgabe 3/2019 Open Access

International Ophthalmology 3/2019

A rating scale is a proper method to evaluate changes in quality of life due to dry eye symptoms

Zeitschrift:
International Ophthalmology > Ausgabe 3/2019
Autoren:
Wenwen Xue, Xian Xu, Haidong Zou
Wichtige Hinweise
Wenwen Xue and Xian Xu have contributed equally to this study.

Abstract

Purpose

To determine which utility value assessment method is more suitable to evaluate changes in the quality of life due to dry eye symptoms.

Methods

Dry eye outpatients with a presenting visual acuity of 20/25 or better in the worse-seeing eye were recruited. Presenting distance visual acuity, tear film break-up time, Schirmer I test and fluorescein were assessed. The severity of dry eye symptoms was assessed using the Ocular Surface Disease Index (OSDI), and utility values were measured using the time trade-off (TTO), standard gamble (SG1 and SG2) and rating scale (RS) methods. Different utility values were compared with each other. The most appropriate utility value method to evaluate quality-of-life changes solely due to dry eye symptoms is determined by calculating the correlation between the OSDI score and different utility values.

Results

A total of 104 patients were enrolled. The three sections of OSDI in the order of high to low scores were as follows: “environmental trigger,” “eye discomfort” and “visual function.” The utility scores measured with TTO, SG1, SG2 and RS were 0.95 ± 0.11, 0.96 ± 0.10, 0.99 ± 0.07 and 0.89 ± 0.10, respectively. The utility scores evaluated by the TTO, SG1, SG2 and RS methods were significantly different from each other (p < 0.05). Only the utility scores measured with RS were significantly correlated with the composite OSDI score, “environmental trigger” and “eye discomfort” section scores (p < 0.05).

Conclusions

RS is more sensitive than TTO and SG for the evaluation of altered quality of life due to dry eye symptoms.

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