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Hypoxemia6MWTNCT00740220

Reproducibility of 6 Minute Walk Tests for Oxygen Desaturation

An observational study of Hypoxemia and Anoxia, run by Wake Forest University Health Sciences at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This trial will test the hypothesis that the 6 minute walk test (6MWT) is not reproducible as a measure for oxygen desaturation. Read more about this study

Who is it for?
Ages 18 years and older
How many people
97 participants
Where
1 siteUnited States
Study dates
Sep 2006to Jan 2009
Phase
Observational
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: This study will be carried out in a population of subjects who are taking part in Pulmonary Rehabilitation.

Who may be able to join

  • Taking part in Pulmonary Rehabilitation

Who cannot join

  • Inability to perform 6MWT

Trial locations and contacts

1 site in 1 country.

United States1 site

  • Wake Forest University Health Sciences

    Winston-Salem, North Carolina, 27157

Other trials in United States

About this study

This trial will test the hypothesis that the 6 minute walk test (6MWT) is not reproducible as a measure for oxygen desaturation.

Read the detailed description

Over 16 million adults in the United States are afflicted with chronic obstructive pulmonary disease (COPD) and is the fourth leading cause of death.(McCrory et al. 1190-209). COPD accounts for direct health-care costs of $18 billion.(McCrory et al. 1190-209). Oxygen therapy has been shown to decrease mortality in COPD patients with severe hypoxemia at rest. Oxygen therapy now accounts for the number one expenditure for durable medical equipment. Current requirements for oxygen therapy for COPD patients include a resting or exercise paO2 or spO2 of 55 mmHg or 88% respectively. We have shown that a resting spO2 of < 95% is predictive of those at risk of exercise induced hypoxemia in COPD patients(Knower et al. 732-36) based on continuous spO2 monitoring during a 6 minute walk. Although, the reproducibility of a 6 minute walk has been addressed in terms of a hospital test, simulated home test and actual home test (Guyatt), its inter-variability is not well studied.

We propose to investigate the reliability and inter-variability of the 6 minute walk for oxygen prescription. Currently, two programs are providing pulmonary rehabilitation for COPD patients in the community. Patients perform 6 minute walks under supervision and are monitored by pulse oximetry on a routine basis as part of these programs. We plan to capture the oximetry data in order to determine the reliability of oxygen prescriptions using the 6 minute walk. Patients who are performing a 6 minute walk will be eligible for enrollment. Protocols for the 6 minute walk are already in place and approved by their respective authority in both of the Pulmonary Rehabilitation Programs. These patients will have repeat 6 minute walks on separate in close proximity to determine the reliability of spO2 on any given day. Statistical analysis will be done by the kappa statistic for inter-test agreement in a 3 dimensional matrix.

We ask to waive consent for this study as there is no change to the daily routine of the 6 minute walks already being done as part of Pulmonary Rehabilitation. We plan only to capture the data from these walks.

Keywords
hypoxemia, anoxia, oxygen, dyspnea, pulmonary disease, chronic obstructive
Medical subject headings
Hypoxia, Pulmonary Disease, Chronic Obstructive, Dyspnea, Lung Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT00740220
Study groupRoleWhat they receive
AEach subject will be their own control. Each subject will perform three 6MWTs. Intra-subject reproducibility is being tested.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Kappa Statistic for Correlation of the Oxygen Saturation Across 3 Serial 6 Minute Walk Tests (6MWT)

    The kappa statistic is a measure of the quality of a test. It is a ratio.

    Measured: All three 6MWTs should take place within 30 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted22 Aug 2008 (estimated)
  2. Study startSep 2006
  3. Primary completionJan 2009
  4. Study completionJan 2009

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
97 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00740220
Sponsor's protocol ID
BG02-489
Acronym
6MWT
Status last verified
Apr 2016
First submitted
20 Aug 2008
Last updated
15 Dec 2017
Data monitoring committee
No
Individual data sharing
Undecided: Data could only be shared if requestor had IRB approval and funding to re-contact all participants for permission.

Publications

  • Guyatt GH, McKim DA, Weaver B, Austin PA, Bryan RE, Walter SD, Nonoyama ML, Ferreira IM, Goldstein RS. Development and testing of formal protocols for oxygen prescribing. Am J Respir Crit Care Med. 2001 Mar;163(4):942-6. doi: 10.1164/ajrccm.163.4.2002135.

    PubMed 11282770

  • Knower MT, Dunagan DP, Adair NE, Chin R Jr. Baseline oxygen saturation predicts exercise desaturation below prescription threshold in patients with chronic obstructive pulmonary disease. Arch Intern Med. 2001 Mar 12;161(5):732-6. doi: 10.1001/archinte.161.5.732.

    PubMed 11231707

  • McCrory DC, Brown C, Gelfand SE, Bach PB. Management of acute exacerbations of COPD: a summary and appraisal of published evidence. Chest. 2001 Apr;119(4):1190-209. doi: 10.1378/chest.119.4.1190.

    PubMed 11296189

  • Long term domiciliary oxygen therapy in chronic hypoxic cor pulmonale complicating chronic bronchitis and emphysema. Report of the Medical Research Council Working Party. Lancet. 1981 Mar 28;1(8222):681-6.

    PubMed 6110912

  • Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease: a clinical trial. Nocturnal Oxygen Therapy Trial Group. Ann Intern Med. 1980 Sep;93(3):391-8. doi: 10.7326/0003-4819-93-3-391.

    PubMed 6776858

  • ATS Committee on Proficiency Standards for Clinical Pulmonary Function Laboratories. ATS statement: guidelines for the six-minute walk test. Am J Respir Crit Care Med. 2002 Jul 1;166(1):111-7. doi: 10.1164/ajrccm.166.1.at1102. No abstract available.

    PubMed 12091180

  • Bradley JM, O'Neill B. Short-term ambulatory oxygen for chronic obstructive pulmonary disease. Cochrane Database Syst Rev. 2005 Oct 19;2005(4):CD004356. doi: 10.1002/14651858.CD004356.pub3.

    PubMed 16235359

  • Casanova C, Cote C, Marin JM, Pinto-Plata V, de Torres JP, Aguirre-Jaime A, Vassaux C, Celli BR. Distance and oxygen desaturation during the 6-min walk test as predictors of long-term mortality in patients with COPD. Chest. 2008 Oct;134(4):746-752. doi: 10.1378/chest.08-0520. Epub 2008 Jul 14.

    PubMed 18625667

  • Celli BR, Cote CG, Marin JM, Casanova C, Montes de Oca M, Mendez RA, Pinto Plata V, Cabral HJ. The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease. N Engl J Med. 2004 Mar 4;350(10):1005-12. doi: 10.1056/NEJMoa021322.

    PubMed 14999112

  • Croxton TL, Bailey WC. Long-term oxygen treatment in chronic obstructive pulmonary disease: recommendations for future research: an NHLBI workshop report. Am J Respir Crit Care Med. 2006 Aug 15;174(4):373-8. doi: 10.1164/rccm.200507-1161WS. Epub 2006 Apr 13.

    PubMed 16614349

  • Drummond MB, Blackford AL, Benditt JO, Make BJ, Sciurba FC, McCormack MC, Martinez FJ, Fessler HE, Fishman AP, Wise RA; NETT Investigators. Continuous oxygen use in nonhypoxemic emphysema patients identifies a high-risk subset of patients: retrospective analysis of the National Emphysema Treatment Trial. Chest. 2008 Sep;134(3):497-506. doi: 10.1378/chest.08-0117. Epub 2008 Jul 18.

    PubMed 18641094

  • Dunne PJ. The demographics and economics of long-term oxygen therapy. Respir Care. 2000 Feb;45(2):223-8; discussion 228-30.

    PubMed 10771794

  • Eaton T, Young P, Milne D, Wells AU. Six-minute walk, maximal exercise tests: reproducibility in fibrotic interstitial pneumonia. Am J Respir Crit Care Med. 2005 May 15;171(10):1150-7. doi: 10.1164/rccm.200405-578OC. Epub 2005 Jan 7.

    PubMed 15640367

  • Eiser N, Willsher D, Dore CJ. Reliability, repeatability and sensitivity to change of externally and self-paced walking tests in COPD patients. Respir Med. 2003 Apr;97(4):407-14. doi: 10.1053/rmed.2002.1462.

    PubMed 12693802

  • Emtner M, Porszasz J, Burns M, Somfay A, Casaburi R. Benefits of supplemental oxygen in exercise training in nonhypoxemic chronic obstructive pulmonary disease patients. Am J Respir Crit Care Med. 2003 Nov 1;168(9):1034-42. doi: 10.1164/rccm.200212-1525OC. Epub 2003 Jul 17.

    PubMed 12869359

Questions about this trial

What is this clinical trial studying?

An observational study of Hypoxemia and Anoxia, run by Wake Forest University Health Sciences at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 15 Dec 2017. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 20 Apr 2009). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Kappa Statistic for Correlation of the Oxygen Saturation Across 3 Serial 6 Minute Walk Tests (6MWT) (time frame: All three 6MWTs should take place within 30 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00740220, which also lists 34 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Dec 2017.

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