Evaluation of the German Version of a Validated Keratoconus Questionaire (KORQ)

March 5, 2024 updated by: Johannes Kepler University of Linz

Keratoconus, which results in thinning of the cornea, affects mainly young patients. The causes are currently only partially known. The aim of this study is the evaluation of a keratoconus questionnaire in German. Until now this questionnaire is only in use in English.

Within the study patients will be asked to fill out a questionnaire. The questionnaire deals with issues that are influenced by keratoconus: Visual impairment and its impact on quality of life. This questionnaire (KORQ) is an already validated questionnaire in English. Within this study we would like to translate the questionnaire and validate it in German.

Within this study 50 patients will be included for the validation of the questionnaire. Based on previous studies evaluating the Keratoconus Questionnaire (KORQ) in other languages, a number of 50 patients has been shown to be sufficient for validation.

No control examination is necessary for this study.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

130

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Austria
    • Upper Austria
      • Linz, Upper Austria, Austria, 4020
        • Kepler University Klinik

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 105 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Patients are recruited in the keratoconus outpatient clinic as part of our routine checkups

Description

Inclusion Criteria:

  • Keratoconus
  • Signing of a written consent form for participation in the study

Exclusion Criteria:

  • Difficulty in understanding patient information

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Validation of Keratoconus Outcome Research Questionnaire (KORQ)
Time Frame: at screening visit
validation of a questionnaire in german language
at screening visit

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Johannes Kepler University of Linz

Investigators

  • Principal Investigator: Matthias Bolz, Kepler University Hosiptal

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 11, 2022

Primary Completion (Actual)

August 30, 2023

Study Completion (Actual)

August 30, 2023

Study Registration Dates

First Submitted

October 5, 2022

First Submitted That Met QC Criteria

October 5, 2022

First Posted (Actual)

October 7, 2022

Study Record Updates

Last Update Posted (Estimated)

March 6, 2024

Last Update Submitted That Met QC Criteria

March 5, 2024

Last Verified

March 1, 2024

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KUK-Opthalmology-008

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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