Definition of GOLD-0

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GOLD-0: One of the stages of chronic obstructive lung disease (COPD), according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD).

GOLD-0 is stage 0 in the GOLD classification of COPD and indicates "at risk" for COPD. GOLD-0 is characterized by chronic cough and sputum production. Lung function, as measured by spirometry (a test of the air capacity of the lungs),is still normal.