Dataset Information

Test-Retest Reliability of the Impact of Vision Impairment-Very Low Vision Questionnaire.

ABSTRACT:

Purpose

Most patient-reported outcome measures used in ophthalmology show floor effects in a very low vision population, which limits their use in vision restoration trials. The Impact of Vision Impairment-Very Low Vision scale (IVI-VLV) was developed to specifically target a very low vision population, but its test-retest reliability has not been investigated yet.

Methods

The German version of the IVI-VLV was administered twice to patients with stable disease of a low vision clinic. Test and retest person measures of the IVI-VLV subscales were obtained from Rasch analysis. Test-retest reliability was investigated by intraclass correlation coefficients and Bland-Altman plots.

Results

We included 134 patients (72 women, 62 men) at a mean age of 62 ± 15 years. The intraclass correlation coefficients were 0.920 (95% confidence interval, 0.888-0.944) for the activities of daily living and mobility subscale of the IVI-VLV and 0.929 (95% confidence interval, 0.899-0.949) for the emotional well-being subscale. Bland-Altman plots did not indicate any systematic bias. In linear regression analysis, test-retest differences were not significantly associated with visual acuity or administration interval.

Conclusions

Both subscales of the IVI-VLV showed excellent repeatability independent of visual acuity and length of repeat interval. Further validation steps including an assessment of the patient-reported outcome measure's responsiveness are required for use in vision restoration trials.

Translational relevance

The results support repeated use of the IVI-VLV as a patient-reported end point in future studies in very low and ultralow vision populations.

SUBMITTER: Fink DJ

PROVIDER: S-EPMC10266551 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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Publications

Test-Retest Reliability of the Impact of Vision Impairment-Very Low Vision Questionnaire.

Fink David J DJ Terheyden Jan H JH Pondorfer Susanne G SG Holz Frank G FG Finger Robert P RP

Translational vision science & technology 20230601 6

<h4>Purpose</h4>Most patient-reported outcome measures used in ophthalmology show floor effects in a very low vision population, which limits their use in vision restoration trials. The Impact of Vision Impairment-Very Low Vision scale (IVI-VLV) was developed to specifically target a very low vision population, but its test-retest reliability has not been investigated yet.<h4>Methods</h4>The German version of the IVI-VLV was administered twice to patients with stable disease of a low vision clin ...[more]

PMID: 37306995

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Dataset Information

Test-Retest Reliability of the Impact of Vision Impairment-Very Low Vision Questionnaire.

Purpose

Methods

Results

Conclusions

Translational relevance

Publications

Test-Retest Reliability of the Impact of Vision Impairment-Very Low Vision Questionnaire.

Similar Datasets

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