Validation of the Turkish Version of the S3-NIV Questionnaire

May 27, 2026 updated by: Dilek Unsal, Istanbul Saglik Bilimleri University

Reliability and Validity of the Turkish Version of the Severe Respiratory Insufficiency Questionnaire for Non-Invasive Ventilation (S3-NIV)

This study aims to evaluate the psychometric properties, including reliability and validity, of the Turkish version of the Severe Respiratory Insufficiency Questionnaire for Non-Invasive Ventilation (S3-NIV). The S3-NIV is a specific tool designed to assess difficulties and compliance in patients receiving home non-invasive ventilation. A total of 120 stable patients using home NIV for at least 3 months will be enrolled across multiple centers.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Following the official linguistic validation process authorized by the Mapi Research Trust, this multi-center observational study will assess the psychometric validity of the Turkish S3-NIV questionnaire. Patients will complete the 11-item S3-NIV questionnaire alongside a sociodemographic and clinical data form. To evaluate test-retest reliability, a randomly selected subgroup of patients (n=40) will re-complete the questionnaire 14 to 15 days after the initial administration. Internal consistency, construct validity (via factor analysis), and criterion validity (correlations with clinical parameters such as daily NIV usage hours and blood gas values) will be analyzed.

Study Type

Observational

Enrollment (Estimated)

120

Contacts and Locations

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

Study Contact

Study Locations

  • Turkey (Türkiye)
      • Istanbul, Turkey (Türkiye), 34854
        • Sureyyapasa Chest Diseases and Thoracic Surgery Training and Research Hospital
        • Contact:

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Adult patients with chronic respiratory failure who are followed up in the outpatient clinic and have been using a home non-invasive ventilation (NIV) device for at least 3 months.

Description

Inclusion Criteria:

  • Diagnosed with chronic respiratory failure requiring home non-invasive ventilation (NIV).
  • Using a home NIV device for at least 3 months.
  • Being in a clinically stable phase (no exacerbation or hospitalization in the last 1 month).
  • Able to understand and answer the questionnaire.
  • Provided written informed consent.

Exclusion Criteria:

  • Acute respiratory failure or clinical instability.
  • Severe cognitive impairment or psychiatric disorders preventing reliable communication.
  • Active malignancy or terminal illness with a short life expectancy.
  • Refusal to provide informed consent.

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Home NIV Patients
Patients with chronic respiratory failure who have been using home non-invasive ventilation (NIV) for at least 3 months and are in a clinically stable phase.
Other: Turkish Version of the S3-NIV Questionnaire
An 11-item self-administered questionnaire designed to evaluate the difficulties and compliance of patients using home non-invasive ventilation (NIV).

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Internal Consistency and Construct Validity of the Turkish S3-NIV
Time Frame: Baseline (Day 0)
Evaluated using Cronbach's alpha coefficient for internal consistency and Confirmatory/Exploratory Factor Analysis (CFA/EFA) to confirm the structural validity of the 11-item scale.
Baseline (Day 0)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Test-Retest Reliability
Time Frame: 14 to 15 days after baseline
Evaluated using the Intraclass Correlation Coefficient (ICC) between the first and second administrations of the questionnaire in a randomly selected subgroup.
14 to 15 days after baseline

Collaborators and Investigators

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

Sponsor

Istanbul Saglik Bilimleri University

Investigators

  • Principal Investigator: Ipek Ozmen, Prof., Sureyyapasa Chest Diseases and Thoracic Surgery Training and Research Hospital

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 (Estimated)

May 21, 2026

Primary Completion (Estimated)

October 30, 2026

Study Completion (Estimated)

December 30, 2026

Study Registration Dates

First Submitted

May 20, 2026

First Submitted That Met QC Criteria

May 20, 2026

First Posted (Actual)

May 27, 2026

Study Record Updates

Last Update Posted (Actual)

May 28, 2026

Last Update Submitted That Met QC Criteria

May 27, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 26/40

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

A decision on sharing individual participant data (IPD) has not yet been made. Data sharing may be considered upon reasonable request to the principal investigator after the publication of the study results.

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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