The Assessment of Airway Resistance and Airtrapping in Elderly COPD Patients by Forced Oscillation Technique (FOT)

March 12, 2012 updated by: Tse Hoi Nam, Kwong Wah Hospital
The study hypothesize that parameters of new function machine---'forced oscillation technique' (FOT) can correlate well with the conventional lung function data for measurement of airway resistance and airtrapping in elderly COPD patients.

Study Overview

Status

Completed

Conditions

Detailed Description

INTRODUCTION:

Forced oscillation technique (FOT) may be a good supplementary tool to assess lung function in elderly since it is a simple and fast tool requiring minimal patients' cooperation.

AIMS:

To investigate the accuracy of forced oscillation test FOT in assessment of airway resistance and airtrapping in elderly COPD patients by comparing FOT parameters to various conventional lung function parameters including FEV1, FEF 25-75, RV/TLC ratio, IC etc. The best FOT parameter for airway resistance and airtrapping is also determined.

STUDY DESIGN:

A cross-sectional study conducted in Kwong Wah Hospital, Hong Kong, SAR

METHODS:

COPD patients were recruited from 1st Jan, 2010 to 31st Dec 2011. Both of the lung function tests (forced oscillation technique (FOT) and conventional lung function test) were performed. Parameters of FOT (FRes FDep, RAvr, XAvr, were compared with conventional lung function test for assessment of both airway resistance and airtrapping in COPD subjects. Adjusted FOT parameters (FResRatio and FDep) were also compared with %FEV1 and different GOLD stages.

Statistics:

Comparison between FOT parameters and spirometric parameters was done by correlation test and expressed as Spearman coefficient. ANOVA test is used to compare FOT parameters among different groups of GOLD stages (stage 1 to 4) and groups with various degree of airtrapping (stage 1 to 3). Post hoc analysis was estimated by Bonferroni test.

Study Type

Observational

Enrollment (Actual)

158

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

60 years to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

COPD patients from both 'in-patient' and 'outpatient clinic' in Kwong Wah Hospital, Hong Kong, China

Description

Inclusion Criteria:

  • COPD patients with previous lung function tests confirming irreversible obstructive pattern

Exclusion Criteria:

  • Lung function test failed to show any obstructive pattern
  • Paitents with co-existing pulmonary diseases including asthma, interstitial lung diseases, lung malignancy etc.
  • Patients with active infectious diseases like tuberculosis

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

Collaborators and Investigators

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

Sponsor

Kwong Wah Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

January 1, 2010

Primary Completion (Actual)

December 1, 2011

Study Completion (Actual)

December 1, 2011

Study Registration Dates

First Submitted

March 12, 2012

First Submitted That Met QC Criteria

March 12, 2012

First Posted (Estimate)

March 14, 2012

Study Record Updates

Last Update Posted (Estimate)

March 14, 2012

Last Update Submitted That Met QC Criteria

March 12, 2012

Last Verified

March 1, 2012

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • KW/EX-12-030 (48-15)

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.

Clinical Trials on COPD

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Bosnia & Herzegovina

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe