What are the diagnostic criteria for COPD?

COPD stands for chronic obstructive pulmonary disease, and its diagnosis is typically based on clinical symptoms and pulmonary function testing. The most prominent symptoms of COPD include chronic cough with excessive sputum production, as well as wheezing and dyspnea. COPD is a respiratory disorder characterized by irreversible airflow limitation in the lungs. It is often an occupational disease, frequently associated with prolonged inhalation of excessive dust and harmful gases.