GOLD Stage I Chronic Obstructive Pulmonary Disease (COPD) (GOLD)
|First Submitted Date||May 12, 2011|
|First Posted Date||May 26, 2011|
|Last Update Posted Date||May 26, 2011|
|Start Date||February 2009|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures
||Maximal oxygen consumption [ Time Frame: Baseline ]
Exercise capacity was directly assessed following an incremental progressive shuttle test. The exercise capacity was defined as the maximal oxygen consumption (VO2 peak, ml/kg/min) by direct measurements of gas exchanges.
|Original Primary Outcome Measures||Same as current|
|Change History||No Changes Posted|
|Current Secondary Outcome Measures
|Original Secondary Outcome Measures||Same as current|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||GOLD Stage I Chronic Obstructive Pulmonary Disease (COPD)|
|Official Title||GOLD Stage I COPD: Is it Really a Disease ? Exercise Tolerance, Muscle Function and Response to Bronchodilation in GOLD Stage I COPD Patients|
Recently integrated in clinical practice, the Global Initiative for Chronic Obstructive Lung Disease (GOLD) classification states that a mild (stage I) chronic obstructive pulmonary disease (COPD) is present, in a smoker, when the postbronchodilator forced expired volume in 1 second (FEV1) to forced vital capacity (FVC) ratio is < 0.7. A major change that was introduced by the GOLD classification system was that COPD could be diagnosed despite an FEV1 that is within normal predicted values (above 80% predicted). Because it suggests diagnosing and detecting COPD earlier than done until very recently in medical practice, the GOLD standards bring in a new reality to clinicians. In fact, this novel COPD classification comes with new research challenges because the functional impacts and systemic consequences related to COPD are mostly documented in patients with moderate to severe stages with little information specifically in GOLD stage I COPD. This information is important if the investigators are to convince physicians that GOLD stage I COPD needs to be diagnosed and eventually treated.
The investigators aimed to characterize GOLD stage I COPD patients according to activity-related dyspnea. More specifically, our objectives were to compare:
i) baseline pulmonary function ii) exercise capacity iii) quadriceps muscle function iv) levels of physical activity in daily life
between symptomatic (Sx) GOLD stage I COPD patients, asymptomatic (ASx) GOLD stage I COPD patients and healthy control subjects (CTRL). The investigators reasoned that exercise tolerance and physical activity levels would be decreased in Sx GOLD stage I COPD patients as it would be similar between ASx GOLD stage I COPD patients and CTRL.
The study will be conducted among three subgroups: symptomatic GOLD stage I patients with COPD, asymptomatic patients GOLD stage I COPD and healthy control subjects with normal lung function. Subjects will be paired for age, sex and smoking history. The project will require three visits. In the initial visit, assessment of the pulmonary function with respiratory symptoms quantification will allow to classify subjects in the proper subgroup. The Medical Research Council (MRC) dyspnea scale will serve as the reference outcome to determine whether COPD patients are symptomatic or not. Patients with an MRC dyspnea score < 2 will be considered asymptomatic. A second questionnaire (ATS-DLD-78) will serve to document cough, expectorations, wheezing and smoking history in every subjects. Body composition will be measured by bioimpedance and by waist circumference after a blood sample taken in the morning, in a fasting state. A six-minute walk test (6MWT) will be performed by all subjects. After a one-hour resting period, a maximal incremental shuttle walking test will be realized in the same visit to quantify maximal exercise capacity. Measures of force and endurance of the quadriceps will be taken by magnetic stimulation of the femoral nerve before the maximal walking test. Finally, subjects will receive a portable device to monitor physical activity for a period of 7 days.
In the 2nd and 3rd visits, subjects will realize an endurance walking test at 85 % of their predetermined maximal capacity. Before each endurance test, a bronchodilator or a placebo will be administered following a randomized double-blind design. Measures of force and endurance of the quadriceps will be taken by magnetic stimulation of the femoral nerve before and 10-min after endurance exercise tests. A needle biopsy of the vastus lateralis will be performed at the end of the third visit.
|Study Design||Observational Model: Case Control
Time Perspective: Cross-Sectional
|Target Follow-Up Duration||Not Provided|
|Biospecimen||Retention: Samples Without DNA
Muscle biopsies Venous blood samples
|Sampling Method||Non-Probability Sample|
|Study Population||Participants were recruted after a participation to a research protocol on i) prevalence of COPD in Canada and ii) early detection of lung cancer. Finally, some participants were recruited following medical consultation with a pneumologist.|
|Intervention||Drug: Combination ipratropium/salbutamol or placebo (nebulization)
The COPD patients were randomly assigned a combination of ipratropium/salbutamol or a placebo in a double-blind crossover design. The bronchodilation produced by the medication was given in order to evaluate if bronchodilation was effective in increasing exercise tolerance during an endurance shuttle walking test in patients with GOLD stage I COPD.
Other Name: Combivent or placebo (nebulization)
|Publications *||Gagnon P, Casaburi R, Saey D, Porszasz J, Provencher S, Milot J, Bourbeau J, O'Donnell DE, Maltais F. Cluster Analysis in Patients with GOLD 1 Chronic Obstructive Pulmonary Disease. PLoS One. 2015 Apr 23;10(4):e0123626. doi: 10.1371/journal.pone.0123626. eCollection 2015.|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||February 2011|
|Primary Completion Date||Not Provided|
|Ages||40 Years to 75 Years (Adult, Senior)|
|Accepts Healthy Volunteers||Yes|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||Canada|
|Removed Location Countries|
|Other Study ID Numbers||GOLD-20378|
|Has Data Monitoring Committee||Yes|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||Dr François Maltais, Institut Universitaire de cardiologie et de pneumologie de Québec|
|Study Sponsor||Laval University|
|PRS Account||Laval University|
|Verification Date||May 2011|