stages of COPD

Introduction

For all stages: FEV1/FVC < 70%

Staging

Stage 1: (mild COPD)

• mild airflow limitation
• FEV1 >= 80% predicted
• chronic cough & sputum production may be present
• patient/subject may not be aware of COPD

Stage 2: (moderate COPD)

• worsening airflow limitation
• FEV1 50-80% predicted
• shortness of breath on exertion
• patient/subject typically seeks medical attention at this stage due to chronic respiratory symptoms or exacerbation of disease

Stage 3: (severe COPD)

• further worsening airflow limitation
• FEV1 30-50% predicted
• greater dypnea
• reduced exercise tolerance
• recurrent exacerbations

Stage 4: (very severe COPD)

• severe airflow limitation
• FEV1 < 30% predicted or < 50% predicited + respiratory failure
• quality of life is impaired
• exacerbations may be life-threatening

Additional terms

• chronic obstructive pulmonary disease (COPD)
• Global Initiative for Chronic Obstructive Lung Disease (GOLD)