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NCT Number: NCT07450885

"Turkish Validation and Reliability Study of the Brompton Breathing Pattern Assessment Tool in Asthma Patients"

The purpose of this study is to evaluate the validity and reliability of the Turkish version of the Brompton Breathing Pattern Assessment Tool (BPAT) in individuals with asthma. This study aims to determine whether the BPAT is a valid and reliable tool for assessing breathing patterns in Turkish-speaking asthma patients. The research question being addressed is: "Is the Turkish version of the BPAT a valid and reliable tool for assessing breathing patterns in individuals with asthma?"

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Key information

Conditions

Asthma Breathing Pattern Disorder Bronchial Diseases Hypersensitivity Hypersensitivity, Immediate Immune System Diseases Lung Diseases Lung Diseases, Obstructive Respiratory Hypersensitivity Respiratory Tract Diseases

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Süreyyapaşa Chest Diseases And Thoracic Surgery Training And Research Hospital

Istanbul, 34844, Turkey (Türkiye)

About this study

This study is designed to assess the validity and reliability of the Turkish version of the Brompton Breathing Pattern Assessment Tool (BPAT). BPAT is a well-established tool used to assess the breathing patterns of individuals with respiratory conditions. In this study, a group of asthma patients will be evaluated using the BPAT to determine its applicability and consistency in the Turkish-speaking population.

The reliability of the tool will be tested through repeated measurements, and its validity will be assessed by comparing BPAT results with other validated asthma assessment tools. The data will be analyzed to evaluate the internal consistency, test-retest reliability, and construct validity of the BPAT in a clinical asthma population.

The linguistic validation process will be conducted following the ISPOR Task Force guidelines, including forward translation, reconciliation, back-translation, and cognitive debriefing. The psychometric properties of the tool, including internal consistency, test-retest reliability, and construct validity, will be evaluated according to the COSMIN checklist standards.

Additionally, participant eligibility will be defined as individuals who are diagnosed with asthma and can understand and respond to questions in Turkish. The study will also explore any cultural adaptations necessary for the Turkish version of the BPAT to ensure its cultural relevance and accuracy in assessments.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Aged between 18 and 75 years
  • Diagnosed with severe persistent asthma according to the Global Initiative for Asthma (GINA) criteria
  • Turkish ethnicity
  • Ability to read and write in Turkish
  • Willingness to participate in the study

Exclusion criteria

  • Having had a respiratory infection in the last 1 month
  • Use of oral corticosteroids in the last 4 weeks
  • Presence of malignancy, vasculitis, or pregnancy
  • Body Mass Index (BMI) > 35 kg/m2
  • Diagnosis of COPD or other primary respiratory diseases (excluding asthma)
  • Any musculoskeletal, neurological, or cardiovascular condition that could interfere with breathing pattern assessment or impede potential respiratory physiotherapy applications

Treatment and study plan

Brompton Breathing Pattern Assessment Tool (BPAT) - Turkish Version

Other

A tool used to assess breathing patterns in asthma patients through clinical observation.

Validation Battery (Nijmegen Questionnaire, Dyspnea-12, Asthma Control Test (ACT), Asthma Quality of Life Questionnaire (Mini AQLQ), Spirometry)

Other

A set of validated questionnaires and objective tests used to compare with BPAT results for construct validity

Primary outcomes

  1. Construct Validity of the Turkish Version of the Brompton Breathing Pattern Assessment Tool (BPAT)

    Time frame: Baseline

    The study aims to evaluate the construct validity of the Turkish version of the BPAT in assessing breathing patterns among Turkish-speaking asthma patients. Validity will be determined by calculating correlation coefficients (e.g., Spearman's or Pearson's r) between the total BPAT scores, objective physiological measures (spirometry results such as FEV1 and FVC), and the scores of established reference clinical tools (Nijmegen Questionnaire, Dyspnea-12, Asthma Control Test (ACT), and Asthma Quality of Life Questionnaire (Mini-AQLQ).

Secondary outcomes

  1. Test-Retest Reliability of the Turkish Version of BPAT

    Time frame: 7 to 14 days

    This outcome will assess the test-retest reliability of the Turkish version of BPAT by measuring the consistency of the tool in repeated assessments. The BPAT will be administered twice to the same participants. Reliability will be evaluated by calculating the Intraclass Correlation Coefficient (ICC).

  2. Inter-Rater Reliability of the Turkish Version of BPAT

    Time frame: Baseline

    This outcome will assess the inter-rater reliability of the Turkish version of BPAT. Two independent physiotherapists will evaluate the breathing pattern of the same asthma patient. The raters will be blinded to each other's scores to determine the consistency of the tool's application between different users. Reliability will be evaluated by calculating the Intraclass Correlation Coefficient (ICC) or Cohen's Kappa.

  3. Comparison of BPAT Results with Other Asthma Assessment Tools

    Time frame: Baseline

    Description: This outcome will compare the BPAT results with other validated asthma assessment tools, such as Nijmegen Questionnaire, Dyspnea-12 Questionnaire , spirometry, ACT (Asthma Control Test), and Mini AQLQ (Asthma Quality of Life Questionnaire), to determine the congruence between different assessment methods.

Sponsors and collaborators

Lead sponsor

Istanbul Saglik Bilimleri University

Other

Collaborators

  • Istanbul Sureyyapasa Chest Diseases and Chest Surgery Training and Research Hospital

Registry information

Official study title

Validity and Reliability Study of the Turkish Version of the Brompton Breathing Pattern Assessment Tool (BPAT) in Individuals With Asthma

Acronym: BPAT-Turkish

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Mar 5, 2026
Registry last updated
May 7, 2026

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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