Turkish Version of the Glaucoma Quality of Life-15 Questionnaire

Glaucoma is a disease with irreversible loss of visual field and optic neuropathy and is the most important cause of irreversible vision loss after cataract in the world. Although clinical evaluations reveal the level of glaucoma quantitatively, it is necessary to evaluate the impact of this pathology on daily functions and quality of life with a holistic perspective and to provide appropriate advice to patients according to the information obtained. Glaucoma Quality of Life -15 Questionnaire (GQoL-15) was developed by Nelson et al. in 2003 to evaluate the quality of life of glaucoma patients. The aim of this study is to translate GQoL-15 into Turkish and evaluate its test-retest reliability for Turkish-speaking population.

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Key information

Conditions

Glaucoma Eye Diseases Ocular Hypertension Quality of Life

Age range

20 year–60 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Yücel Öztürk

Istanbul, Turkey (Türkiye)

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Diagnosis of primary open angle glaucoma more than 6 months with visual field tests,
Have the sufficient cognitive level to answer the scale questions.

Exclusion criteria

To have retinal or optic nerve pathologies that may cause loss of visual field or decrease in visual field except glaucoma,
To undergo eye surgery in the last 3 months.

Treatment and study plan

Determining quality of life

Behavioral

Quality of Life

Primary outcomes

Glaucoma Quality of Life 15 Questionnaire total score

Time frame: 6 months

GQoL-15 total score was got after calculate the all subscale values. Subscales are as; 1) Central and near vision (two questions); 2) Peripheral vision (six questions); 3) Dark adaptation (six questions); 4) Outdoor mobility (one question). The item responses for each factor are marked on a five-point scale (1 meaning no difficulty and 5 meaning severe difficulty), 0 is marked if the participant does not perform the activity because of non-visual causes. Higher GQL-15 total scores and subscale scores are reveals lower QoL.
25-item National Eye Institute Visual Functioning Questionnaire (NEI-VFQ 25)

Time frame: 6 months

NEI-VFQ 25 total score was got after calculate the all values. It is comprised of 25 items which are; general health and vision, ocular pain, difficulty with vision activities, distance-vision activities, limitation of social functioning, mental health problems, role limitations, dependency on others, driving difficulties, difficulty with color vision and difficulty with peripheral vision. A total score of NEI-VFQ 25 is generated by averaging the scores of all subscales except general health. The item responses for factors are marked on a five or six point scale. Subscale score can be calculated, overall total lower score indicates better vision-related QoL.

Sponsors and collaborators

Lead sponsor

Acibadem University

Other

Collaborators

Haydarpasa Numune Training and Research Hospital

Registry information

Official study title

Reliability and Validity of the Turkish Version of the Glaucoma Quality of Life-15 Questionnaire

Important dates

Study start: 2019
Primary completion: 2020
Study completion: 2020
First posted: May 30, 2019
Registry last updated: Apr 8, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed