What Are the 4 Stages of COPD? | Symptoms, Treatment & Management Guide

Chronic Obstructive Pulmonary Disease (COPD), a debilitating respiratory condition marked by persistent breathlessness and decreased lung function, presents a profound impact on the daily lives of those affected. 

To understand COPD and its treatment, we first need to be aware of the stages of COPD. The following content describes the 4 stages of COPD in detail as well as diagnosis and management of COPD.

What Are the 4 Stages of COPD?

For many, COPD can go undiagnosed or undertreated until the later stages of the disease, exacerbating symptoms and decreasing quality of life. This makes early detection of the stages important as timely intervention and optimal management strategies can then be initiated.

COPD is divided into 4 stages, based on the symptoms the person has. These are the stages as defined by Global Initiative for Chronic Obstructive Lung Disease (GOLD). 

COPD is not just a single disease entity, but rather, a continuum of symptoms that begin with mild symptoms, progressing to a very severe stage.

How COPD Is Classified Into 4 Stages

1. Stage 1 COPD: Mild

Symptoms

• The first symptoms are mild and often unnoticed, except during times of exertion. 
• These include mild shortness of breath and a nagging dry cough, especially when being active.
• Your pulmonary function test indicates that your airflow is about 80% of normal.

Treatment & Management: Treatment at this stage may include lifestyle modification such as quitting smoking, taking a bronchodilator (in the form of an inhaler) and starting with pulmonary rehabilitation.

2. Stage 2 COPD: Moderate

Symptoms

• As COPD gets worse, you might notice such as shortness of breath worsens, accompanied by a persistent cough.
• There is sputum production. 
• Flare-ups can cause changes in sputum color. 
• Your pulmonary function test indicates that your airflow is about 50% to 79% of normal.

Treatment & Management: Treatment options include medications, such as bronchodilators, anti-inflammatory medicines and antibiotics. You will also continue pulmonary rehabilitation to help you learn breathing techniques and lifestyle modifications that help you manage your symptoms.

3. Stage 3 COPD: Severe

Symptoms

• With severe COPD, you may have worsening symptoms. 
• Symptoms become more severe, especially in the mornings, with more frequent flare-ups. 
• You may notice swollen ankles, feet and legs. 
• You may have chronic fatigue (tiredness)
• Your pulmonary function test indicates that your airflow is about 30% to 50% of normal. 

Treatment & Management: Treatments for stage 3 COPD include medications such as inhalers and bronchodilators as well as oxygen therapy and continued pulmonary rehabilitation. Flare-ups may be managed with corticosteroids and/or hospitalization.

4. Stage 4 COPD: Very Severe

Symptoms

• Breathing difficulties become more noticeable. 
• Heartbeat can become fast or irregular. 
• A crackling sound can be heard in the chest when breathing. 
• Delirium, weight loss or pulmonary hypertension are possible. 
• There may be emergencies such as breathing complications, lung infections or respiratory failure
• Your pulmonary function test indicates that your airflow is less than 30% of normal.

Treatment & Management: Treatment options at stage 4 may include bronchoscopic lung volume reduction (BLVR) in addition to other medications mentioned in previous stages, or lung transplant.

What Causes COPD to Progress?

During the early stages of COPD an abnormal inflammatory response is present in the lungs. There is an obstruction of normal airflow through the lung’s airways, and there’s an abnormal pulmonary immune response to long-term noxious particle exposure (usually from cigarette smoke). This gradually results in increasing damage to the lung tissues.

Over time, the irreversible damage to the lungs, caused by COPD, spreads to areas where oxygen is exchanged. In the later stages of COPD, the lungs have stopped being able to provide the body with an adequate supply of oxygen. This, in turn, impacts other organs, such as the heart.

Ultimately, end-stage COPD results in disability or even death.

How Is COPD Diagnosed?

COPD is diagnosed on the basis of certain specific lung tests and investigations.

• Spirometry: Spirometry is the main breathing test for COPD. For this test, you will be asked to blow as long and hard as you can into a tube that connects to a spirometer machine. The machine checks how much air you can breathe in and out, as well as how fast you can breathe out. This helps your doctor see if you have COPD or another lung condition like asthma. 
• Arterial blood gases (ABGs): These tests are done to check your oxygen and carbon dioxide levels in the blood.
• Chest X-ray or Chest CT scan: Imaging tests look for lung changes that COPD can cause.
• Electrocardiogram (ECG or EKG): This test checks your heart rhythm as a cause of breathlessness.
• Exercise/walking testing: Your doctor might use this test to find out if the oxygen level in your blood decreases when you exercise.
• Alpha-1-antitrypsin (AAt) test: This is done to test for a protein made in the liver that protects that lungs from damage.

Best Lifestyle Tips to Manage COPD

There are certain ways to slow down the progression of COPD. Practice the following steps to help prevent the complications associated with COPD: 

Avoid Smoking and Exposure to Pollutants:

• Smoking cigarettes is the leading cause of COPD.  Quitting smoking and avoiding secondhand smoke are crucial for preventing COPD. 
• It is also important to avoid exposure to indoor and outdoor pollutants, such as dust, chemical fumes, and air pollution.

Maintain Good Indoor Air Quality:

• Using air purifiers, maintaining cleanliness, and ensuring proper ventilation can help improve indoor air quality. 
• Air purifiers work by removing particulate matter, which includes dust, pet dander, smoke particles, and certain types of pollen, from the air. 

Healthy Lifestyle: 

• A balanced diet rich in fruits, vegetables, lean proteins, and whole grains can support overall health. 
• Regular exercise, as recommended by a healthcare professional, can help improve lung capacity and physical endurance. 

Stress Management: 

• Stress management is an integral part of chronic disease management, including COPD. Chronic stress can exacerbate symptoms, affect overall well-being, and potentially contribute to more frequent exacerbations.
• Manage your stress with techniques you prefer such as yoga, exercise, meditation or even by engaging in your favourite leisure activities.

Proper Hand Hygiene and Vaccinations

• Regular hand washing can prevent respiratory infections, which may exacerbate COPD and accelerate lung function decline. 
• Staying up-to-date with vaccinations, such as the flu shot and the pneumonia vaccine, can also help prevent infections that could potentially worsen COPD.

Regular Check-ups and Early Detection: 

• Regular check-ups with a pulmonologist allow for early detection of symptoms and timely management of COPD.

How to Prevent COPD Exacerbations

When you have chronic obstructive pulmonary disease (COPD), you might experience occasional exacerbations (flare-ups). These episodes are characterized by a sudden worsening of symptoms including severe shortness of breath and a sense of chest tightness. Prevention is important if you are at risk of COPD exacerbations. 

Here are a few handy tips that can help prevent COPD exacerbations: 

• Taking your COPD medications (long-acting inhalers/bronchodilators) can optimize your lung function, making you less susceptible to the effects of lung inflammation and mucus accumulation.
• Lifestyle strategies such as a healthy diet, proper sleep, regular light exercise and avoiding pollutants can reduce the chances of infections and exposure to inhaled irritants.
• Smoking cessation is the most effective intervention for preventing COPD and disease progression.

When to See a Pulmonologist?

You should see your pulmonologist for the following 4 reasons: 

• For a COPD management plan: The pulmonologist will devise a treatment plan which will include personalised advice about your COPD, including information about your symptoms, treatments, self-management.

• For management of COPD exacerbations: Exacerbations of COPD can result in the need for emergency department visits and hospitalizations. Your pulmonologist may treat the exacerbation with short-acting bronchodilators along with corticosteroids, if necessary. 

• For regular check-ups: You should see your pulmonologist to review your COPD at least once a year. Frequent checkups may be needed to test your pulmonary function and evaluate your response to medications. 

• For surgical treatment options: In more severe cases of COPD, surgery may be necessary. Your pulmonologist may suggest bronchoscopic lung volume reduction (BLVR) or lung transplant.

Frequently Asked Questions