About this trial
The goal of this clinical trial is to investigate whether an astaxanthin-based dietary supplement combined with a pulmonary rehabilitation training program could improve exercise capacity in patients with COPD. The main questions it aims to answer are:
• whether an astaxanthin-based dietary supplement combined with a pulmonary rehabilitation training program could improve 6MWD in patients with COPD.
The drug administration group will receive:
* Two capsules of astaxanthin formula supplement daily for 8 weeks. * Pulmonary rehabilitation training: a total of 8 weeks, 2-3 times a week.
The control group will receive a total of 8-week pulmonary rehabilitation training, 2-3 times a week.
The investigators will compare the drug administration group and the control group to see if the difference between the 2 groups reaches a minimal clinically important difference.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patients who met the GOLD diagnostic criteria for stage II-IV COPD
Patients who met the indications for pulmonary rehabilitation training: mMRC score
3 or self-reported decline in physical function.
Disqualifiers
Hypoxemia (resting partial pressure of oxygen < 60mmHg or oxygen saturation < 88%) or patients requiring continuous oxygen therapy or with any contraindications to exercise testing (refer to the American Society of Thoracic Surgeons/American College of Chest Physicians exercise testing guidelines).
Using oral glucocorticoids
Long-term oxygen therapy
Participated in a supervised exercise program within the past 12 months
Trial design
Parallel
Treatments tested in this trial
Astaxanthin
Dietary supplementTwo capsules of astaxanthin formula supplement daily for 8 weeks.
Pulmonary rehabilitation training
BehavioralA total of 8 weeks, 2-3 times per week. 1) Patient education: once a week, including disease explanation, chronic disease self-management awareness, and medication guidance. 2) Exercise training: 60 minutes each time, including 10 minutes of warm-up exercise, 40 minutes of aerobic exercise, and 10 minutes of stretching and relaxation (monitoring participants' working frequency, SpO2, heart rate, dyspnea score, and leg fatigue during exercise). 3) 20-min lower extremity endurance training (treadmill walking or treadmill exercise at 60% of 6MWT speed). 4) 20 minutes of lower limb strength training: squats, jump rope, straight leg raising exercises, etc.
Treatment groups
Trial outcomes
Primary outcomes
6MWD change from baseline of two groups
The minimal clinically important difference of 6-minute walking distance of two groups.
Secondary outcomes
Health-related quality of life of two groups
Using the COPD Assessment Test (CAT) to assess health-related quality of life. The CAT score ranges from 0 to 40, with higher scores indicating a worse outcome (a more severe impact of COPD on a patient's life).
Psychological status of two groups
Using the Hospital Anxiety and Depression Scale (HADS) to evaluate psychological status. The HADS consists of two subscales (Anxiety and Depression), each ranging from 0 to 21, for a maximum total score of 42. Higher scores indicate a worse outcome (higher levels of anxiety and depression).
Degree of dyspnea of two groups
Degree of dyspnea was assessed using the Modified Medical Research Council (mMRC) dyspnea scale. The mMRC scale ranges from 0 to 4, with higher scores indicating a worse outcome (more severe breathlessness).
Locations
Sponsors and contacts
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