Physical Activity Clinical Trial
— GOLDOfficial title:
GOLD Stage I COPD: Is it Really a Disease ? Exercise Tolerance, Muscle Function and Response to Bronchodilation in GOLD Stage I COPD Patients
Verified date | May 2011 |
Source | Laval University |
Contact | n/a |
Is FDA regulated | No |
Health authority | Canada: Ethics Review Committee |
Study type | Observational |
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.
Status | Completed |
Enrollment | 53 |
Est. completion date | February 2011 |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 40 Years to 75 Years |
Eligibility |
Inclusion Criteria: - Smoking history (= 10 pack/year) Exclusion Criteria: - Anticoagulation or coagulation defect - Hypoxemia or exercise-induced desaturation (SpO2 < 85%) - Antibiotic or oral corticosteroid therapy (end of treatment < 1 month prior to study) - Anti-inflammatory treatment, exacerbation (< 3 months) - Myopathy - Neuromuscular or locomotor diseases - Recent cancer - Unstable cardiac condition - Asthma |
Observational Model: Case Control, Time Perspective: Cross-Sectional
Country | Name | City | State |
---|---|---|---|
Canada | Institut universitaire de cardiologie et de pneumologie de Québec - Université Laval | Québec | Quebec |
Lead Sponsor | Collaborator |
---|---|
Laval University | Boehringer Ingelheim, Pfizer |
Canada,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Maximal oxygen consumption | 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. | Baseline | No |
Secondary | Quadriceps muscle force | Quadriceps muscle strength was measured with magnetic stimulation of the femoral nerve. Mid-thigh cross-sectional area (MTCSA) was obtained following a computed-tomography scan. Quadriceps muscle biopsy was performed to measure muscle metabolism. |
Baseline | No |
Secondary | Levels of physical activity in daily life | A portable armband was worn by the participants on a 7-days basis to monitor physical activities in daily life. | Baseline | No |
Secondary | Oxydative stress | Oxydative stress will be quantified in the blood and in the muscle samples obtained during the muscular biopsy. | Baseline | No |
Secondary | Pulmonary function | Pulmonary function will be measured by spirometry and plethysmography in the initial visit. In the subsequent visits, pulmonary function will be measured by spirometry before and 60-min after the nebulization of either placebo or bronchodilator. A computed-tomography scan of the lungs was also assessed | At baseline and before and 60-min after the nebulization of either placebo or bronchodilator | No |
Secondary | Time to exhaustion during a constant intensity exercise test | Time to exhaustion was also defined as exercise tolerance and was assessed during a endurance shuttle walking test 90-min following the nebulization of whether Combivent or Placebo in a double-blind crossover design. It was defined as the time in seconds for which a subject could maintain an intensity of 85% of the maximal oxygen consumption during walking or running. | Before and 90-min after bronchodilation or placebo | No |
Secondary | Systemic inflammation | Systemic inflammation will be studied from blood samples obtained in every participants. | Baseline | No |
Secondary | Quadriceps muscle endurance | Quadriceps muscle endurance was defined as the time to exhaustion following a constant quadriceps force corresponding to 50 % of the maximal voluntary contraction. | Baseline | No |
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